V
120
150
200
Installation
User aanndd
Service Manual
WATER PRODUCTS
COMPANY
A DIVISION OF A. O. SMITH CORPORATION
www.aosmithinternational.com
your installer
gis
Read this manual carefully
Warning
Read this manual carefully before starting up the water heater. Failure to
read this manual and to follow the instructions in this manual may lead to
accidents, personal injury, and damage to the appliance.
Copyright © 2007 A.O. Smith Water Products Company
All rights reserved.
Nothing from this publication may be copied, reproduced and/or published by
means of printing, photocopying or by whatsoever means, without the prior
written approval of A.O. Smith Water Products Company.
A.O. Smith Water Products Company reserves the right to modify specifications
stated in this manual.
Any brand names mentioned in this manual are registered trademarks of their
respective owners.
Trademarks
Liability
A.O. Smith Water Products Company accepts no liability for claims from third
parties arising from improper use other than that stated in this manual and in
accordance with the General Conditions registered at the Eindhoven Chamber
of Commerce.
Refer further to the General Conditions. These are available on request, free of
charge.
Although considerable care has been taken to ensure a correct and suitably
comprehensive description of all relevant components, the manual may
nonetheless contain errors and inaccuracies.
Should you detect any errors or inaccuracies in the manual, we would be
grateful if you would inform us. This helps us to further improve our
documentation.
If you have any comments or queries concerning any aspect related to the
appliance, then please do not hesitate to contact:
More information
A.O. Smith Water Products Company
PO Box 70
5500 AB Veldhoven
Netherlands
Telephone:
(free) 0870 - AOSMITH
0870 - 267 64 84
General:
Fax:
+31 40 294 25 00
+31 40 294 25 39
E-mail :
Website:
www.aosmithinternational.com
In the event of problems with connecting to the gas, electricity or water supply,
please contact your installation's supplier/installation engineer .
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Table of contents
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Table of contents
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Instruction manual GWV
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Table of contents
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Instruction manual GWV
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1 Introduction
This manual describes how to install, service and use the GWV appliance. This
appliance is a closed, gas-fired water heater with a fan in the air supply. The
appliance is always supplied together with a storage tank.
1.1 About the appliance
The possible categories for this appliance are C13, C33, and B23.
The information in this manual applies to the: GWV 120, GWV 150 and GWV
200.
The appliance has been manufactured and equipped in accordance with the
European standard for gas-fired storage water heaters for the production of
domestic hot water (EN 89). The appliances are therefore compliant with the
European Directive for Gas Appliances, and are entitled to bear the CE mark.
Warning
Read this manual carefully before starting up the installation. Failure to read
the manual and to follow the printed instructions may lead to personal injury and
damage to the appliance.
Warning
If there is a gas smell:
1.2 What to do if you
smell gas
No naked flames! No smoking!
Avoid causing sparks! Do not use any electrical equipment or switch, i.e. no
telephones, plugs or bells!
Open windows and doors!
Shut off the mains gas supply valve!
Warn occupants and leave the building!
After leaving the building, alert the gas distribution company or your installation
engineer.
As the (end) user, installation engineer or service and maintenance engineer,
you must ensure that the entire installation complies, as a minimum, with the
official local:
1.3 Regulations
•
•
•
•
•
•
•
•
•
•
•
building regulations;
energy supplier's directives for existing gas installations;
directives and technical guidelines for natural gas installations;
safety requirements for low-voltage installations;
regulations governing the supply of drinking water;
regulations governing ventilation in buildings;
regulations governing the supply of air for combustion;
regulations governing the discharge of products of combustion;
requirements for installations that consume gas;
regulations governing indoor waste water disposal;
regulations imposed by fire brigade, power companies and municipality.
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Introduction
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Furthermore, the installation must comply with the manufacturer's instructions.
Note
Later amendments and/or additions to all regulations, requirements and
guidelines published on or prior to the moment of installing, will apply to the
installation.
The three target groups for this manual are:
1.4 Target groups
•
•
•
(end) users;
installation engineers;
service and maintenance engineers.
Symbols on each page indicate the target groups for whom the information is
intended. See the table.
Target group symbols
Symbol
Target group
(End) user
Installation engineer
Service and maintenance engineer
A service should be carried out at least once a year, both on the water side and
on the gas side. Maintenance frequency depends, among other things, on the
water quality, the average burning time per day and the set water temperature.
1.5 Maintenance
Note
To determine the correct maintenance frequency, it is recommended to
arrange for the service and maintenance engineer to check the appliance on
both the water and gas side within three months following installation. Based on
this check, the best maintenance frequency can be determined.
Note
Regular maintenance extends the service life of the appliance.
Note
Both the end user and the service and maintenance engineer are
responsible for regular maintenance. They will need to establish clear
agreements on this.
Note
If the appliance is not regularly maintained, the warranty will become void.
The following notation is used in this manual:
1.6 Forms of notation
Note
Important information.
Caution
Ignoring this information can lead to the appliance being damaged.
Warning
Failure to carefully read this information may lead to personal injury and
serious damage to the appliance.
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1.7 Overview of this
document
The table provides an overview of the contents of this document.
Contents of this document
Chapter
Target groups
Description
This chapter describes how the appliance functions.
This chapter describes the installation activity to be
completed before you actually start up the appliance.
This chapter describes how to fill the appliance.
This chapter describes how to drain the appliance.
This chapter describes the general control of the
appliance using the display.
This chapter describes the status (mode or condition) that
the appliance may have, and possible actions to take.
This chapter describes how to start the appliance running.
The general heating cycle of the appliance is also
described.
This chapter describes how to shut the appliance down for
a brief or long period of time.
This chapter describes the main menu of the display. This
is the actual menu for the user, however the installation
engineer and service and maintenance engineers will also
need to use this menu.
This chapter describes the service menu. It is mainly
intended for the installation engineer and service and
maintenance engineers. End users may also refer to this
chapter for additional information about the appliance.
This chapter is mainly intended for the installation
engineer and the service and maintenance engineer. It
describes appliance errors. These errors are indicated on
the display. A troubleshooting table of possible causes
and solutions is provided. End users may also refer to this
chapter for additional information about the appliance.
This chapter describes how to determine the optimum
frequency at which to carry out maintenance. Both the
end user and the service and maintenance engineer are
responsible for regular maintenance. They need to reach
clear agreement on this.
Note
If the appliance is not regularly maintained, the
warranty will become void.
This chapter sets out the maintenance tasks to be carried
out during a service.
This chapter states the warranty terms and conditions.
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Introduction
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Working principle of the appliance
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Cut-away view of the appliance
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Legend
11.
Drain valve
22. System pump:
23. Temperature sensor T
24. Cold water inlet
25. Inlet line
1.
2.
3.
4.
5.
Hot water outlet
12. Pressure switch
13. Air distributor plate
14. Flame probe
3
Insulation layer
Electrical connector block
Aluminium strips
15. Hot surface igniter/flame
probe connector
26. Return line
ThermoControl (electronic
controller)
27. Return valve
16. Injectors
28. Supply valve
6.
7.
8.
9.
Flue gas discharge
Jacket cover plate
Air supply
17. Glow plug
29. Flow-through switch:
30. Temperature sensor T
31. Temperature sensor T
32. Storage tank
18. Bar burners
1
2
19. Combustion chamber
20. Heat exchanger
21. Inspection glass
Gas controls
10. Fan
33. P-valve
In this appliance, the cold water enters the bottom of the storage tank through
the cold water inlet (24). The system pump (22) ensures that the water flows into
the appliance. The water is heated by the heat exchanger (20) in the
combustion chamber (19).
The heated water leaves the appliance via the return valve (26) and then, once
heated, flows into the storage tank (32).
To prevent condensation from forming in the appliance, the water that flows into
o
it via the supply line (25) must not be colder than 30 C. This will only be the case
the very first time, or after it has been shut down for a long period.
Once the appliance and the storage tank are completely filled with water, they
are permanently pressurised by the water pipes. As hot water is drawn from the
storage tank, cold water is immediately added.
Water flows into the appliance through the ribbed elements (20). This ribbing
ensures better heat transfer. There are aluminium strips (4) on these elements.
These slow down the flue gases, improving the yield. The air required for
combustion is forcibly delivered by the fan (10).
The appliance has two identical gas controls (9) of which one will be open
(partial load) or both (full load). Thanks to the modulated supply of gas and air
(8), the optimum gas/air mixture is always achieved. The flue gases are
removed via the flue gas outlet pipe (6). The air supply and flue gas outlet are
always in parallel.
The insulation layer (2) prevents heat loss. To protect against corrosion, the
storage tank is enamelled on the inside. Anodes provide extra protection
against corrosion.
For maintenance, the storage tank has an aperture for inspection and cleaning.
2.3 The appliance's
heating cycle
The appliance uses sensor T (23) to determine whether the water temperature
3
set (T ) has been reached. When T is lower than the set water temperature
set
3
(T ), the electronic controller registers a "heat demand". This will switch the
set
system pump on and the flow-through switch (29) will give a signal to the
controller. The appliance will ignite and the water will be heated. Once T gets
3
above T , the demand for heat has been met and the electronic control stops
set
the heating cycle; the system pump (22) keeps running (12.12 "Setting the
pump running-on time") for a little while.
The electronic controller assumes a certain margin when ending a heat
demand. We refer to this margin as the hysteresis (12.2 "Setting the
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Working principle of the appliance
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2.4 Protection for the
appliance
2.4.1 Introduction
The electronic controller monitors the water temperature and ensures safe
combustion. This is achieved by:
•
•
•
•
•
•
the Gas control
the Fan
the Pressure switch
the Flame probe
2.4.2 Water temperature protection
The electronic controller monitors the water temperature with temperature
sensors T , T and T as shown in the table.
1
2
3
Temperature protection
Safety
T , T , T > 98°C
Description
The appliance switches back to partial load once the heat demand has been
met.
1
2
3
For additional safety
T , T , T > 99°C
A lockout error of the appliance occurs. The controller must be manually reset
1
2
3
may only be performed if T < 90°C.
3
2.4.3 Gas control
When heat is required, the controller (5) opens the left-hand gas control (9) so
that the gas can flow into the premix bar burners (18) of the first tray of burners.
The air is mixed in with the gas at the front of the burners. The hot surface igniter
(17) ignites the leftmost burner. The adjacent burners then ignite from left to
right.
If more heat is demanded, the controller opens the second gas control (9) as
well. There is no separate igniter for the ignition of the second tray of burners.
The gas controls have two valves as safety devices. The valves shut off the gas
supply.
Smooth ignition is achieved by opening the gas controls with a delay ("softlite").
2.4.4 Fan
The fan (10) provides an optimum air supply (8) when there is a heat demand.
This air comes into a separate chamber on the air distribution plate (13).
Overpressure is created in the space and the air can only escape the appliance
via the premix bar burners (18).
As a safety feature, the fan ensures that any gases present in the combustion
chamber are removed, both before and after combustion. We refer to this as
pre-purge and post-purge.
The fan speed is continuously monitored by the electronic controller (5). The
electronic controller takes control if the speed of rotation varies too much from
the set value.
2.4.5 Pressure switch
The pressure switch (12) guarantees the air supply during pre-purging and
when the appliance is operational. The standard position of the pressure switch
is open. When sufficient pressure difference is reached, the pressure switch
closes. However, in the event of a fault, the pressure switch is tripped open, and
the heating cycle is interrupted.
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Pressure measurements are made at the air distribution plate (high pressure)
and in a Venturi in the burners (low pressure).
The table shows the trip point per appliance.
Note
The trip point of the pressure switch is not adjustable.
Pressure switch trip points
Appliance
Closing pressure
differential
Opening pressure
differential
GWV 120
GWV 150
GWV 200
> 80 Pa
> 89 Pa
> 107 Pa
< 66 Pa
< 75 Pa
< 92 Pa
2.4.6 Flame probe
To ensure that no gas can flow when there is no combustion, the water heater
has a flame probe (14). The electronic controller uses this probe for flame
detection, by means of ionisation detection. The electronic control closes the
gas valve as soon as it detects that no flame is present.
2.4.7 Flow-through switch
the flow-through switch (29) guarantees the flow of water through the appliance
(before operation and while the appliance is running). The standard position of
the flow-through switch is open. When the flow is sufficient, the switch closes
and the heating cycle starts. If the flow of water through the appliance gets too
low, then the switch opens, which interrupts the heating cycle; this is to prevent
overheating.
Flow measurement is done in the return line between the appliance and the
storage tank.
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Working principle of the appliance
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2.5 Safety of the instal-
lation
As well as the standard safeties in the appliance (2.4 "Protection for the
appliance"), it must also be protected by an inlet combination and a pressure-
reducing valve. A P-valve is also used.
2.5.1 Unvented installation
With unvented installation, an expansion valve and expansion vessel prevent
excessive pressure in appliance. This prevents damage being caused to the
enamelled coating (in the appliance) or to the heat exchanger. A non-return
valve prevents excessive pressure build-up in the water supply system. This
valve also prevents water from flowing backwards from the storage tank into the
cold water supply system. The pressure-reducing valve protects the installation
against excessively high water supply pressures (> 8 bar). These components
2.5.2 Vented installation
With a vented installation, excess pressure is taken up by the open water tank.
The height of the head tank determines the working pressure in the appliance,
which may not exceed 8 bar. The appliance must also be fitted with a vent pipe
from the hot water pipe, which opens into the cold water tank.
Normally, the vent pipe should discharge into a separate discharge
channel/drain or otherwise to the open cold water head tank. The appliance
side.
2.5.3 Inlet combination and pressure-reducing valve
An excessively high pressure in the storage tank can damage the enamelled
layer. An inlet combination and pressure-reducing valve prevents this. The inlet
combination acts as a stop valve, non-return valve and overflow valve. If the
water supply pressure is too high (> 8 bar), a pressure-reducing valve must be
used. Both components must be fitted in the cold water supply (3.6 "Water
2.5.4 P-valve
The appliance has a P-valve (33) as standard. A P-valve (Pressure Relief Valve)
monitors the pressure in the installation. If the pressure gets too high (> 10 bar),
the valve will open. The water can now flow out of the installation. Because the
installation is under water supply pressure, cold water will automatically flow into
the storage tank. The valve remains open until the unsafe situation (< 10 bar)
has been resolved.
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3 Installation
Warning
Installation work should be carried out by an approved installation engineer
in compliance with the general and local regulations imposed by the gas, water
and power supply companies and the fire service.
The appliance may only be installed in a room that complies with the
requirements stated in national and local ventilation
This chapter describes the installation activities to be carried out before you
3.1 Introduction
•
•
•
•
•
•
•
•
•
For a possible conversion to a different gas category, see
To avoid damaging the appliance, remove the packaging carefully.
We recommend unpacking the appliance at or near its intended location.
3.2 Packaging
Caution
The appliance may only be manoeuvred in an upright position. Take care
that the appliance is not damaged after unpacking.
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Installation
Caution
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3.3 Environmental
conditions
An open appliance may not be used in rooms where chemical substances
are stored or used due to the risk of explosion and corrosion of the appliance.
Some propellants, bleaching agents and degreasing agents etc. disperse
vapours that are explosive and/or cause accelerated corrosion. If the appliance
is used in a room in which such substances are present, the warranty will be
void.
The appliance is suitable for both open and closed combustion.
For closed combustion, the air supply required is independent of the room in
which it is installed. In this event, there are no additional ventilation
requirements. Appliance types possible here are C13 and C33.
The appliances can also be installed as open appliances and may then only
be placed in an open boiler room. The appliance type is B23.
3.3.1 Air humidity and ambient temperature
The boiler room must be frost-free, or be protected against frost. The table
shows the environmental conditions that must be adhered to for correct
functioning of the electronics present in the appliance to be guaranteed.
Air humidity and ambient temperature specifications
Air humidity and ambient temperature
Air humidity
max. 93% RV at +25°C
Functional: 0 < T < 60°C
Ambient temperature
3.3.2 Maximum floor loading
Allow for the weight of the appliance and the storage tank with respect to the
maximum floor loading; refer to the tables.
Specifications of the weight of the appliance, with respect to the maximum floor
loads.
Weight of the appliance (kg)
GWV 120
GWV 150
GWV 200
225
250
300
Specifications of the weight of the storage tank, with respect to the maximum
floor loads.
Weight of the storage tank filled with water (kg)
ST 400
ST 500
ST 600
ST 750
ST 1000
505
630
855
965
1315
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3.3.3 Water composition
The appliance is intended for heating drinking water. The drinking water must
comply with the regulations governing drinking water for human consumption.
The table gives an overview of the specifications.
Water specifications
Water composition
Hardness
> 1.00 mmol/l:
(alkaline earth ions)
•
•
•
German hardness > 5.6° dH
French hardness > 10.0° fH
British hardness > 7.0° eH
Conductivity
> 125 µS/cm
Acidity (pH value)
7,0 < pH value < 9.5
Note
If the water specifications deviate from those stated in the table, the storage
If the water hardness is greater than 4° dH, please contact A.O. Smith.
3.3.4 Working clearances
For access to the appliance and the storage tank it is recommended that the
following clearances are observed:
•
•
Around the appliance and the storage tank: 50 cm.
Above the storage tank (room to replace the anodes):
-
-
100 cm if using fixed anodes, or
50 cm if using flexible anodes.
If the available clearance is less than 100 cm, flexible magnesium anodes
may be ordered.
Note
When installing the appliance and storage tank, be aware that any leakage
can cause damage to the immediate environment or floors below. If this is the
case, the appliance should be installed above a wastewater drain or in a
suitable metal leak tray.
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Installation
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specifications") of the appliance.
3.4 Technical specifica-
tions
3.4.1 Dimensions of the appliance
Plan and elevation of the appliance
D
H
I
J
2
E
G
F
1
M
3
5
A
4
K
B
L
C
IMD-0483 R0
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Dimensions (all measurements in mm unless otherwise indicated)
Size
A
Description
GWV 120
835
GWV 150
835
GWV 200
835
Overall height
B
Height of pump connection + heat
exchanger outlet
350
350
350
C
D
E
F
Length of appliance
910
1230
625
150
150
300
1065
1495
625
1465
1895
625
Length including flow switch
Width of appliance
Air supply diameter
150
200
G
H
Diameter of flue gas discharge
150
200
Centre-to-centre distance between air
supply/flue gas outlet
300
480
I
Air supply distance
160
185
760
345
240
185
760
345
1680
R 2
260
185
760
345
2100
R 2
J
Air supply/flue gas discharge distance
Height of gas connection
K
L
M
1
2
3
4
5
Height of drain valve connection
Length including pump
1500
1
Supply connection (external)
Return connection (internal)
Gas connection (external)
Drain valve connection (internal)
P-valve connection (internal)
R 1 /
2
1
Rp 1 /
Rp 2
Rp 2
2
R 1
R 1
R 1
3
3
3
/ "
/ "
/ "
4
4
4
3
3
3
/ "
/ "
/ "
4
4
4
3.4.2 General and electrical specifications
Chimney data
1
Chimney
Unit
GWV 120
GWV 150
GWV 200
Not insulated (max. length)
m
-
8
8
8
Not insulated (number of bends)
2
2
2
Not insulated with condensation removal
(max. length)
m
20
20
20
Not insulated with condensation removal
(number of bends)
-
2
2
2
Insulated (max. length)
m
-
20
2
20
2
20
2
Insulated (number of bends)
1) Stated lengths and bends apply for both flue gas removal and air supply
Tap capacity
Tap capacity (Tcold = 10°C)
Unit
GWV 120
GWV 150
GWV 200
Maximum temperature regulated
continuous ∆T=28°C
continuous ∆T=44°C
continuous ∆T=50°C
continuous ∆T=55°C
continuous ∆T=70°C
°C
l/h
l/h
l/h
l/h
l/h
85
85
85
3041
1935
1703
1548
1216
3787
2410
2121
1928
1515
4838
3078
2709
2463
1935
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Contact ratings
Unit
W
GWV 120
GWV 150
GWV 200
Electrical power consumption
Supply voltage
200
210
350
VAC
230 (+10 -15%) - 50Hz
Operating pressure
Unit
GWV 120
GWV 150
GWV 200
Operating pressure
bar
8
8
8
3.4.3 Gas data
Gas data
Description II
Unit
GWV 120
GWV 150
GWV 200
2H3P
Gas category 2H: G20 - 20 mbar
Orifice diameter
mm
2,31
2
2,31
2
2,31
2
(1) = Blank plate
(2) = Burner pressure regulator
Nominal load (upper value)
Nominal output
kW
122,2
99,0
20
152,1
123,3
20
194,3
157,5
20
kW
Supply pressure
mbar
mbar
Burner pressure
2 x 8.9
11,5
8
2 x 9.3
14,3
10
2 x 8.0
18,4
15
3
Gas consumption*
m /h
Number of burners (total)
Gas category 3P: G31 – 37 mbar
Orifice diameter
-
mm
1,50
2
1,50
2
1,50
2
(1) = Blank plate
(2) = Burner pressure regulator
(3) = High/low regulator
Nominal load (upper value)
Nominal output
kW
111,1
90,0
37
138,8
112,5
37
216,6
175,5
37
kW
Supply pressure
mbar
mbar
kg/h
-
Burner pressure
2 x 13.3
7,8
2 x 12.7
9,7
2 x 14.5
15,1
15
Gas consumption
Number of burners (total)
8
10
* Gas consumption at 15°C and 1013.25 mbar
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3.5 Installation diagram
This figure shows the installation diagram. This diagram is used in the sections
in which the actual connection process is described.
Installation diagram
Unvented
12
14
14
14
11
B
C
3
4
6
5
4
D
10
23
11
11
9
16
A
9
4
1
5
15
IMD-0486 R2
Vented
12
14
14
14
17
H
A
11
19
E
4
B
18
C
3
4
6
5
4
D
10
23
11
9
11
9
4
IMD-0487 R2
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Installation
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Legend
Only applicable numbers are mentioned.
14. hot water draw-off points
15. expansion valve (mandatory)
16. expansion vessel (mandatory)
18. water tank
1.
pressure-reducing valve (mandatory if the mains
water pressure exceeds 8 bar)
2.
3.
4.
5.
6.
9.
inlet combination (mandatory)
expansion valve
19. float valve
stop valve (recommended)
non-return valve (mandatory)
circulation pump (optional)
drain valve
23. P-valve
A.
B.
C.
D.
E.
H.
cold water supply
hot water supply
circulation pipe
gas supply
10. manual gas valve (mandatory)
11. service stop valve
12. temperature gauge (recommended)
overflow pipe
overflow safety
Warning
3.6 Water connections,
Vented
The installation should be carried out by an authorised installation engineer,
3.6.1 Cold water side
1. Fit an approved stop valve (4) on the cold water side between the cold water
head tank (18) and the appliance, as required by
3.6.2 Hot water side
Note
Insulating long hot water pipes prevents unnecessary energy loss.
1. Fit the T&P valve (3).
2. Optional: fit a temperature gauge (12) so you can check the temperature of
the tap water.
3. Fit a stop valve (11) in the hot water outlet pipe for servicing.
4. If a circulation pipe is required, continue by installing the circulation
3.6.3 Circulation pipe
If an immediate flow of hot water is required at draw-off points, a circulation
pump can be installed. This improves comfort and reduces water wastage.
1. Fit a circulation pump (6) of the correct capacity for the length and resistance
of the circulation system.
2. Fit a non-return valve (5) behind the circulation pump to guarantee the
direction of circulation.
3. Fit two stop valves for service purposes (4).
4. Connect the circulation pipe up to a connection of the storage tank.
3.6.4 System pump
The pump revs can be set using an adjuster unit. This setting depends on the
length of the pipes X between the storage tank and the appliance.
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Instruction manual GWV
is
Distance X
GWV 120
GWV 150
GWV 200
1
Pipe diameter
Ø 42 (1 / ") Ø 54 (2")
Ø 54 (2")
2
Distance X
•
•
•
0 < X < 2 metres, rev setting 1
2 < X < 4 metres, rev setting 2
4 < X < 6 metres, rev setting 3
You set the revs using the pump's adjuster unit. Proceed as follows:
1. Unscrew the pump's cap.
2. The pump's adjuster unit can be seen.
3. Take the adjuster unit out.
4. Remove the cap of the adjuster unit.
IMD-0519 R0
5. Turn the adjuster unit so that the number of the rev setting required can be
seen.
Instruction manual GWV
27
3
Installation
is
IMD-0520 R0
6. Put the cap back on the adjuster unit.
7. Insert the adjuster unit back in the pump.
8. Fit the cap back on the pump.
Warning
3.7 Water connections,
Unvented
The installation should be carried out by an authorised installation engineer,
3.7.1 Cold water side
1. Fit an approved stop valve (4) on the cold water side as required by
2. The maximum working pressure of the appliance is 8 bar. Because the
pressure in the water pipe at times can exceed 8 bar, you must fit an
approved pressure-reducing valve (1).
3. Fit a non-return valve (5) and an expansion vessel (16).
4. Fit an expansion valve (15) and connect the overflow side to an open
wastewater pipe.
3.7.2 Hot water side
Note
Insulating long hot water pipes will prevent unnecessary energy loss.
1. Optional: fit a temperature gauge (12) so you can check the temperature of
the tap water.
2. Fit the T&P valve (3).
3. Fit a stop valve (11) in the hot water outlet pipe for servicing.
3.7.3 Circulation pipe
If an immediate flow of hot water is required at draw-off points, a circulation
pump can be installed. This improves comfort and reduces water wastage.
1. Fit a circulation pump (6) of the correct capacity for the length and resistance
of the circulation system.
2. Fit a non-return valve (5) behind the circulation pump to guarantee the
direction of circulation.
3. Fit two stop valves for service purposes (4).
4. Connect the circulation pipe up to a connection of the storage tank
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Instruction manual GWV
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3.8 Gas connection
Warning
The installation should be carried out by an authorised installation engineer,
Caution
Make sure that the diameter and length of the gas supply pipe are large
enough to supply sufficient capacity to the appliance.
1. Fit a manual gas valve (10) in the gas supply pipe.
2. Blow the gas pipe clean before use.
3. Close the gas system.
4. Fit the gas supply pipe to the gas system.
Warning
After fitting, check for leaks.
3.9 Air supply and flue
3.9.1 Introduction
This section covers the following subjects:
•
•
•
3.9.2 Requirements for flue gas discharge materials
Warning
Installation must be carried out by an authorised installation engineer, in
Types of appliances
The appliances are approved for appliance types C13, C33 and B23. The figure
and table give information about appliance types C13 and C33. For an
explanation of the possibilities, please contact the manufacturer.
Instruction manual GWV
29
3
Installation
is
C13: appliance with wall conduit
B
A
IMD-0503 R0
C33: appliance with roof conduit
C
B
A
IMD-0509 R0
Note
Make sure that the chimney discharges into an area where this is permitted
for this category of appliance.
30
Instruction manual GWV
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3.9.3 Parallel connections
The air supply duct and flue gas outlet duct for the GWV 120, 150 and 200 exit
flue gas discharge materials") to the concentric wall conduit or roof conduit
using a transition piece.
The following requirements must also be fulfilled:
•
The maximum allowed chimney length (A+B (C)) has the following
dimensions:
-
-
8 metres of uninsulated pipe including 2 bends;
20 metres of uninsulated pipe including 2 bends. With a condensation
outlet in the flue gas outlet, within 8 metres of the appliance;
-
20 metres of insulated pipe including 2 bends;
Caution
Contact the supplier for the installation of an insulated pipe.
•
•
maximum number of 45° or 90° bends allowed is 2.
If you make use of horizontal piping, then this must slope towards the
appliance at a minimum of 5 mm per metre running length!
•
•
The transition piece to convert the air supply and flue gas discharge from
parallel to concentric must be placed immediately before the roof or wall flue
terminal.
The duct length of the air supply must be approximately the same as that of
the flue gas discharge chimney. Make sure that the chimney discharges into
an area where this is permitted for this type of appliance.
3.9.4 Specifications
Note
For C13 and C33-category appliances, we prescribe the use of a roof or wall
conduit approved for the appliance. Use of an incorrect roof or wall flue conduit
can cause the installation to malfunction.
Instruction manual GWV
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3
Installation
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Specifications for transition piece and concentric wall flue terminal (C13)
Subject
Wall flue terminal set:
Description
1
Item No.
GWV 120: 0308 241
GWV 150: 0308 241
GWV 200: 0308 242
1
1
•
1x wall flue terminal (incl. transition
piece)
•
•
•
•
1x wall plate
Construction
Manufacturer
Type
Concentric
1x clamping ring
2x pipe, 500mm
3x bend, 90°
Muelink & Grol
GWV 120: M2000 MDV SE 150
GWV 150: M2000 MDV SE 150
GWV 200: M2000 MDV SE 200
Pipe material
Construction
Parallel
Flue gas
Thick-walled aluminium with lipped sealing ring
discharge
Air supply
Thick-walled aluminium with lipped sealing ring
Pipe diameters
Flue gas
discharge
GWV 120: Ø 150 mm
GWV 150: Ø 150 mm
GWV 200: Ø 200 mm
Air supply
GWV 120: Ø 150 mm
GWV 150: Ø 150 mm
GWV 200: Ø 200 mm
1
No other wall flue terminal is permitted. Use this item number to order the wall conduit set from supplier,
manufacturer or wholesaler.
Specifications for transition piece and concentric roof conduit (C33)
Subject
Description
1
1
1
Roof flue terminal set:
Item No.
GWV 120: 0308 239
GWV 150: 0308 239
GWV 200: 0308 240
•
1x roof flue terminal (incl. transition
piece)
•
•
•
•
1x adhesive sheet
1x clamping ring
2x pipe, 1000 mm
1x bend, 90°
Construction
Manufacturer
Type
Concentric
Muelink & Grol
GWV 120: DDV-VR 150/150-150/220
GWV 150: DDV-VR 150/150-150/220
GWV 200: DDV-VR 200/200-200/300
Pipe material
Construction
Parallel
Flue gas
Thick-walled aluminium with lipped sealing ring
discharge
Air supply
Thick-walled aluminium with lipped sealing ring
Pipe diameters
Flue gas
discharge
GWV 120: Ø 150 mm
GWV 150: Ø 150 mm
GWV 200: Ø 200 mm
Air supply
GWV 120: Ø 150 mm
GWV 150: Ø 150 mm
GWV 200: Ø 200 mm
1
No other wall flue terminal is permitted. Use this item number to order the wall conduit set from supplier,
manufacturer or wholesaler.
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Instruction manual GWV
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Specification of condensation outlet for uninsulated lengths greater than 8
metres and no more than 20 metres
Subject
Description
Condensation outlet set
Item No.
GWV 120: 0308 278
GWV 150: 0308 278
GWV 200: 0308 279
•
•
•
•
1x clamping ring
1x trap
Construction
Manufacturer
Type
n/a
2x pipe Ø 32x500 mm
o
2x bend, Ø 32 90
Muelink & Grol
n/a
Pipe material
Construction
Outlet
Parallel
Thick-walled aluminium with lipped sealing ring
Pipe diameters
Outlet
GWV 120: Ø 150 mm
GWV 150: Ø 150 mm
GWV 200: Ø 200 mm
Warning
3.10 Electrical
connection
The installation should be carried out by an authorised installation engineer,
3.10.1 Introduction
Topics covered in this paragraph, in sequence:
•
•
A program-controlled pump, and external on/off switch and an alarm can
optionally be fitted to the appliance. For these options, see:
•
•
•
•
Note
The optional components are not included in the rating for electrical power
3.10.2 Preparation
Caution
The appliance is phase-sensitive. It is absolutely essential to connect the
mains live (L) to the live of the appliance, and the mains neutral (N) to the neutral
of the appliance.
The figure shows a view of the electrical connector block, and the table shows
the appropriate connections.
Instruction manual GWV
33
3
Installation
is
Connector block
Legend
A.
B.
C.
screws
protector plate
connector block
C
A
B
19
1
IMD-0504 R1
As part of the preparations, you should first remove the protective plate from
the electrical section.
1. Loosen the 2 screws (A) of the electrical section, and remove the protective
cap (B) from the electrical section.
The connector block (C) is now visible.
Note
Consult the table for the connections and consult the electrical diagram for
the electrical component connections.
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Instruction manual GWV
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Electrical connector block
19
18
17
16
15
14
13
12
11
10
9
8
L
7
6
5
L
4
3
2
L
1
X
X
X
X
X
X
X
N
N
N
7
6
5
4
3
2
1
2
1
Terminal Name
Function
Earth connection
19
18
17
16
15
14
13
12
11
10
9
X
X
X
X
External on/off switch
7
6
5
4
n/a
n/a
Earth connection
Alarm signal
X
X
3
2
Earth connection
n/a
X
1
N
Program-controlled pump
8
L
2
7
6
N
System pump
5
L
1
4
3
N
L
Mains voltage (230VAC-50Hz)
2
1
3.10.3 Connecting the mains voltage
The appliance is supplied without a power cable and isolator.
Note
To provide the appliance with voltage, the appliance must be permanently
connected to the mains voltage. A double-pole isolator with a contact gap of at
least 3 mm must be fitted between this permanent connection and the
2
appliance. The power cable must have cores of at least 3 x 1.0 mm .
Warning
Leave the appliance isolated until you are ready to start it up.
1. Pass the power cable through the right-hand strain relief.
2. Connect the cable to terminals 1-2-3 of the DIN rail.
3. Connect the power cable to the double-pole isolator.
4. If you do not need to make any more connections:
-
Fit the protector plate onto the electrical connector block.
3.10.4 Connecting a program-controlled pump
1. Pass the cable through the third strain relief from the right.
2. Connect the cable to terminals 7-8-9 of the DIN rail.
3. Connect the wire up to the pump.
Instruction manual GWV
35
3
Installation
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4. If you do not need to make any more connections:
-
Fit the protector plate onto the electrical connector block.
3.10.5 Connecting an external on/off switch
There is an option for connecting an external ON/OFF switch. In the OFF
position, the programmed operating state is active. In the ON position, the
programmed operating mode is overruled, and the "ON mode" is active.
1. Pass the power cable through the left-hand strain relief.
2. Connect the cables (X and X ) to terminals 17 and 18 according to the
6
3. Connect the wires up to the external switch.
4. If you do not need to make any more connections:
-
Fit the protector plate onto the electrical connector block.
3.10.6 Connecting an alarm signal ('Alarm OUT')
Alarm OUT is a potential free terminal that is switched when an error is
detected. This can be used to signal errors, for example with a bulb. A 230V
circuit can be powered directly. For other voltages, a specific relay prescribed
by AO Smith is required.
1. Pass the lead through the strain relief.
2. Connect the phase cables (X and X ) up to terminals 12 and 13 according
2
3
to the table on page 34. If required, connect earth ( ) to terminal 11.
3. Connect the wires up to the fault sensor.
4. If you do not need to make any more connections:
-
Fit the protector plate onto the electrical connector block.
3.10.7 Sensor wiring
Four connectors are fitted to the left-hand side of the appliance. These
connectors connect four components up to the electronic controller. From top to
bottom, these are:
•
•
•
•
Flow-through switch
Storage tank
Cold water in
Hot water out
The wiring to these components is assembled in the factory. Only the wire to the
storage tank still needs connecting up to the sensor.
Note
3.11 Checking the supply
pressure and burner
pressure
Before starting the appliance and/or checking the supply pressure and
Caution
Before starting up for the first time or after conversion, you must always
check the supply pressure and burner pressure.
Note
The easiest way to check the gas pressures is by using two pressure
gauges. This procedure assumes that these two gauges are available.
36
Instruction manual GWV
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Gas control
Legend
Only applicable numbers are
mentioned.
1.
2.
3.
4.
5.
supply pressure test nipple
burner pressure test nipple
burner pressure regulator
burner pressure control cap
1
2
burner pressure control
adjusting screw
3
4
5
IMD-0510 R0
3.11.1 Preparation
To check the supply pressure and burner pressure, proceed as follows:
the power supply.
2. Undo the screws of the front cover.
3.11.2 Procedure for checking pressures
1. There are two test nipples on both gas controls:
-
-
a supply pressure nipple (1)
a burner pressure nipple (2)
Sealing screws are located inside the test nipples. Loosen both sealing
screws by a few turns. Do no completely undo them, as it may be awkward
retightening them.
2. Connect a pressure gauge to the burner pressure nipple (2).
3. Open the gas supply and vent the gas supply line through the supply
pressure nipple (1).
4. Connect a pressure gauge to the supply pressure nipple (1) when gas starts
to flow from this nipple.
5. Switch on the power to the appliance using the isolator on the appliance.
6. Switch the electronic controller ON by setting the 0/I switch to position I.
Instruction manual GWV
37
3
Installation
is
GENESIS
IMD-0511 R1
The display will now show INTERNAL CHECKfor about 10 seconds and
go to the main menu.
INTERNAL CHECK
MENU
»OFF
^ ON
È WEEK PROGRAM
7. Activate the "ON mode" by going through the following steps:
-
Press the blue arrow once ( ) to position the cursor in front of ONand
press . The display shown here will appear.
»START OPERATION
^ CHANGE SETPOINT
È
Tset=65C
-
Confirm the START OPERATIONby pressing
.
The appliance is now in the "ON mode" and will ignite.
8. When the display shows the text RUNNING 2, you must wait about 1
minute before reading the dynamic pressures (the fan needs this time to run
up to full rotational speed).
9. Use the pressure gauge to read the supply pressure at the test nipple
Note
Consult the mains gas supply company if the supply pressure is not correct.
10. Use the pressure gauge to read the burner pressure at nipple
If the burner pressure is not correct, you can adjust the pressure according to
3.11.3 Adjusting the pressure
1. Remove the cap (4) from the burner pressure regulator (3).
2. Correct the burner pressure by turning the adjusting screw (5), depending
on the correction required:
-
-
Adjustment screw anticlockwise: burner pressure decreases.
Adjustment screw clockwise: burner pressure increases.
38
Instruction manual GWV
is
3. Cover the opening of the adjusting screw and check the burner pressure
4. If the pressure is not set correctly, repeat the preceding steps until the
correct pressure is attained.
5. Fit the cap (4) back on the burner pressure regulator.
6. Activate the "OFF mode" of the electronic controller:
MENU
»OFF
^ ON
È WEEK PROGRAM
7. If the MENUis not displayed:
press
.
-
-
Use and to place the cursor beside OFF
.
Confirm with
.
8. Wait until the fan has stopped, and switch the electronic controller off.
Caution
Failure to wait until the fan stops can cause damage to the appliance.
3.11.4 Finalising
1. Shut off the gas supply.
2. Disconnect the two pressure gauges and retighten the sealing screws in the
test nipples in the gas controls.
3. Put the front panel back.
Note
Before starting the appliance up, take time to fill in the warranty card
supplied with the appliance. This enables us to guarantee the quality of our
systems, and to further enhance our warranty procedure.
Please return this card as soon as possible. Your customer will then receive a
warranty certificate with our warranty conditions.
Instruction manual GWV
39
3
Installation
is
40
Instruction manual GWV
is
4 Conversion to a
different gas category
Caution
The conversion may only by carried out by an authorised installation
engineer.
If the appliance must operate on a family of gases (LP gas or natural gas) or
other gas category than that for which the appliance has been set at the
factory, the appliance will have be adapted using a special conversion kit.
Caution
You must check the supply pressure and burner pressure once the
conversion is complete.
The conversion instructions are not part of this manual.
Contact A.O. Smith if conversion is needed.
Instruction manual GWV
41
4
Conversion to a different gas category
is
42
Instruction manual GWV
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5 Filling
This figure shows the installation diagram. This diagram is used in the sections
in which the actual connection process is described.
5.1 Installation diagram
Installation diagram
Unvented
12
14
14
14
11
B
C
3
4
6
5
4
D
10
23
11
11
9
16
A
9
4
1
5
15
IMD-0486 R2
Instruction manual GWV
43
5
Filling
gis
Vented
12
14
14
14
17
H
E
A
11
19
4
B
18
C
3
4
6
5
4
D
10
23
11
11
9
9
4
IMD-0487 R2
Legend
Only applicable numbers are mentioned.
14. hot water draw-off points
1.
pressure-reducing valve (mandatory if the mains
water pressure exceeds 8 bar)
15. expansion valve (mandatory)
16. expansion vessel (mandatory)
18. water tank
2.
3.
4.
5.
6.
9.
inlet combination (mandatory)
expansion valve
19. float valve
stop valve (recommended)
non-return valve (mandatory)
circulation pump (optional)
drain valve
23. P-valve
A.
B.
C.
D.
E.
H.
cold water supply
hot water supply
circulation pipe
gas supply
10. manual gas valve (mandatory)
11. service stop valve
12. temperature gauge (recommended)
overflow pipe
overflow safety
To fill the appliance, proceed as follows:
5.2 Filling unvented
installations
1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves
(4) for the circulation pump (6).
2. Close the drain valve (9).
3. Open the nearest hot water draw-off point (14).
4. Open the stop valves (11) between the storage tank and the appliance.
5. Open the stop valve (4) on the cold water side (A) so that cold water flows
into the appliance.
6. Completely fill the appliance. When a full water jet flows from the nearest
draw-off point, the appliance is full.
7. Bleed the entire installation of air, for example by opening all draw-off points.
8. Bleed the pump.
44
Instruction manual GWV
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9. The appliance is now under water supply pressure. There should be no
water coming out of the expansion valve (15) or out of the P-valve (23). If
there is, the cause might be:
-
The water supply pressure is greater than the specified 8 bar.
Rectify this by fitting a pressure reducing valve (1).
-
The expansion valve in the protected cold supply setup is defective or
incorrectly fitted.
To fill the appliance, proceed as follows:
5.3 Filling vented instal-
lations
1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves
(4) for the circulation pump (6).
2. Close the drain valve (9).
3. Open the nearest hot water draw-off point (14).
4. Open the stop valves (11) between the storage tank and the appliance.
5. Open the stop valve (4) on the cold water side (A) so that cold water flows
into the appliance.
6. Completely fill the appliance. When a full water jet flows from the nearest
draw-off point, the appliance is full.
7. Bleed the entire installation of air, for example by opening all draw-off points.
8. Bleed the pump.
9. The appliance is now under water supply pressure. There should be no
water coming out of the P-valve (23). If this does happen, the P-valve might
be defective or incorrectly fitted.
Instruction manual GWV
45
5
Filling
gis
46
Instruction manual GWV
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6 Draining
This figure shows the installation diagram. This diagram is used in the sections
in which the actual connection process is described.
6.1 Installation diagram
Installation diagram
Unvented
12
14
14
14
11
B
C
3
4
6
5
4
D
10
23
11
11
9
16
A
9
4
1
5
15
IMD-0486 R2
Instruction manual GWV
47
6
Draining
gis
Vented
12
14
14
14
17
H
E
A
11
19
4
B
18
C
3
4
6
5
4
D
10
23
11
11
9
9
4
IMD-0487 R2
Legend
Only applicable numbers are mentioned.
14. hot water draw-off points
1.
pressure-reducing valve (mandatory if the mains
water pressure exceeds 8 bar)
15. expansion valve (mandatory)
16. expansion vessel (mandatory)
18. water tank
2.
3.
4.
5.
6.
9.
inlet combination (mandatory)
expansion valve
19. float valve
stop valve (recommended)
non-return valve (mandatory)
circulation pump (optional)
drain valve
23. P-valve
A.
B.
C.
D.
E.
H.
cold water supply
hot water supply
circulation pipe
gas supply
10. manual gas valve (mandatory)
11. service stop valve
overflow pipe
12. temperature gauge (recommended)
overflow safety
6.2 Draining unvented
installations
Some service activities require the appliance to be drained. The procedure is as
follows:
1. Activate the MENUwith
.
MENU
»OFF
^ ON
È WEEK PROGRAM
2. Position the cursor in front of OFF
3. Confirm OFFwith
.
.
4. Wait until the fan has stopped. The symbol is then dimmed.
Caution
Failure to wait until the fan stops purging can cause damage to the
appliance.
48
Instruction manual GWV
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5. Switch the appliance OFF (position 0) using the ON/OFF switch on the
control panel.
GENESIS
IMD-0511 R1
6. Isolate the water heater from the power supply by putting the isolator
between the appliance and the mains power supply to position 0.
7. Shut off the gas supply (10).
8. Close the stop valve (11) in the hot water pipe.
9. Close the supply valve (4) in the cold water supply (A).
10. Open the drain valve (9).
11. Bleed the appliance (or installation) so that it drains completely.
6.3 Draining vented
installations
Some service activities require the appliance to be drained. The procedure is as
follows:
1. Activate the MENUwith
2. Position the cursor in front of OFF
3. Confirm OFFwith
.
.
.
4. Wait until the fan has stopped. The symbol is then dimmed.
Caution
Failure to wait until the fan stops purging can cause damage to the
appliance.
5. Switch the appliance OFF (position 0) using the ON/OFF switch on the
control panel.
GENESIS
IMD-0511 R1
6. Isolate the water heater from the power supply by putting the isolator
between the appliance and the mains power supply to position 0.
7. Shut off the gas supply (10).
8. Close the stop valve (11) in the hot water pipe.
Instruction manual GWV
49
6
Draining
gis
9. Close the stop valve (4) between the water tank and the cold water inlet (A).
10. Open the drain valve (9).
11. Bleed the appliance (or installation) so that it drains completely.
50
Instruction manual GWV
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7 The control panel
7.1 Introduction
Topics covered in this chapter:
a
•
•
•
•
•
^»START OPERATION
È CHANGE SETPOINT
Tset=70ÉC
7.3 Meaning of icons
The table explains the meanings of the icons.
7.2 Operation
The entire appliance is controlled and monitored by
the ThermoControl (the electronic control).The figure
shows the electronic controller.
Icons and their meaning
Name
Meaning
Heat demand
Purge
Heat demand detected
Pre- and post-purge using
fan
Pressure switch Pressure switch is closed
GENESIS
Glowing
(Pre)glow
Gas control
Gas control open/ignition
Flame detection Appliance operational
7.4 Electronic controller ON/OFF switch
The ON/OFF switch of the electronic controller is used
to switch the appliance ON and OFF.
IMD-0511 R1
The control panel is completely menu-driven, and
comprises:
INTERNAL CHECK
•
•
a 4-line display with 20 characters per line;
6 pushbuttons for operating the appliance (below
the display);
After switching on, the text INTERNAL CHECK
appears on the display for about 10 seconds. Themain
is made in the main menu, the appliance automatically
•
•
•
6 graphical symbols (above the display);
a connector for a service PC;
an ON/OFF switch.
The pushbuttons are divided into three groups:
•
Navigation buttons:
Note
To isolate the appliance electrically, you must use
the isolator between the appliance and the mains
power supply.
-
-
-
Buttons for UP , and DOWN
;
Enter:
;
Reset button:
•
•
;
7.5 Navigation buttons
.
The use of these buttons is explained with the help of
the figure that shows the main menu (11 "Main
This chapter is specifically intended for the service
and maintenance engineer and installation
engineer.
The navigation buttons are:
In this manual, the display of the electronic controller
is shown as in the figure, both with and without icons.
•
•
•
Buttons for UP , and DOWN
;
Enter:
;
Reset button:
.
Instruction manual GWV
51
7
The control panel
gis
The
^
and
È
indicate that you can scroll up and/or
down. Use the and buttons to scroll.
MENU
OFF
^»ON
È WEEK PROGRAM
EXTRA PERIOD
SETTINGS
The cursor
»points to the option to be activated. In the
display as shown in the figure, you can scroll through
the main menu.
The main menu comprises: OFF
,
ON,
WEEK PROGRAM EXTRA PERIODand
,
SETTINGS. You have to scroll down further to see the
EXTRA PERIODand SETTINGStexts.
Press
to confirm the selected option.
With the
button, you go back one page in a
menu and all options selected in the current menu are
discarded.
Note
The
button is also used to reset the
appliance after a fault.
7.6 PC connection
The PC connection is solely intended to enable
technicians from A.O. Smith to display the status and
history of the appliance. These details can be
important for troubleshooting and/or responding to
complaints.
52
Instruction manual GWV
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8 Status of the
appliance
8.1 Introduction
Topics covered in this chapter, in sequence:
8.2.3
PROG
In this mode a preset week program is active, and the
appliance responds continually to demand within the
time periods set in the week program. There are two
distinct situations possible in this mode:
•
•
•
•
PROG
10:00 Monday
76ÉC
MO 11:15 Tset 75ÉC
8.2 Operating modes
When running, the appliance has four basic operating
modes, namely:
1. The current time falls within a set time period
of the week program.
•
•
•
•
OFF
ON
The figure shows the display with the following
information:
PROG
EXTRA
-
-
line one: the text PROG
;
line two: the time, the day and T and T
8.2.1
OFF
alternately (2.3 "The appliance's heating
In this mode, the frost protection is activated. The
figure shows the display with the following information:
-
-
line three: the next scheduled switch-off time
and the water temperature
period;
of the active
•
•
•
line one: the text OFF
Tset
line two: the time, the day and T
3
line four: is empty when the appliance is idle,
or depending on the heating cycle (2.3 "The
appliance's heating cycle"), displays a text
lines three and four: the text
FROST PROTECTION ACTIVATED
.
such as HEAT DEMAND
.
OFF
13:45 Thursday 6ÉC
FROST PROTECTION
ACTIVATED
PROG
12:00 Monday
MO 11:15
76ÉC
PERIOD ACTIVATED
8.2.2
ON
2. The current time falls outside a set time period
In this mode, the appliance continually responds to the
hot water demand. The figure shows the display with
the following information:
of the week program.
The figure shows the display with the following
information:
•
•
line one: the text ON
;
line two: the time, the day and T and T
-
-
line one: the text PROG
;
line two: the time, the day and T
•
•
line three: the programmed water temperature
alternately (2.3 "The appliance's heating
T
;
set
line four: is empty when the appliance is idle, or
depending on the heating cycle (2.3 "The
appliance's heating cycle"), displays a text such as
-
-
line three: the next scheduled switch-on
time;
line four: displays the text
HEAT DEMAND
.
PERIOD ACTIVATED
.
ON
13:45 Thursday 67ÉC
Tset 75ÉC
Instruction manual GWV
53
8
Status of the appliance
gis
In all modes, the temperature may at any moment
drop below the desired temperature. The appliance
then enters a heating cycle. This heating cycle is
basic operating modes.
The display does not show what type of error has been
detected. A comprehensive overview of the errors is
provided elsewhere in the
If, as end-user, you find the appliance in an error
condition, you may attempt to restart the appliance by
Note
pressing the
button once.
Setting and programming the basic operating
modes is described in the chapter on the Main
However, if the error returns or occurs several times in
a short time, you must contact your service and
maintenance engineer.
8.4 Service condition
8.2.4
EXTRA
In this mode, a single extra period is programmed and
activated. In this mode, the PROGand ONmodes are
temporarily overruled to meet a single period of heat
demand. When the period has passed, the appliance
automatically returns to the previous operating mode.
The figure shows the display with the following
information:
The figure shows the message
!!! WARNING !!!
MAX. BURNINGHOURS:
SERVICE REQUIRED
SERVICE REQUIRED. Should this message
appear, then the appliance is in need of a service and
maintenance inspection. In that case, contact your
service and maintenance engineer.
•
•
line one: the text EXTRA
;
line two: the time, the day and T and T
•
•
line three: the switch-on or switch-off time and the
related water temperature setting;
Note
The message SERVICE REQUIREDis based on
the number of expired burning hours and the preset
service interval. Should the service interval have been
incorrectly selected, contact the service and
maintenance engineer for instructions on how to
adjust this. Information on the maintenance frequency
is provided elsewhere in the
line four: the text PERIOD ACTIVATED
.
EXTRA
12:30 Thursday 76ÉC
TH 12:45 Tset 75ÉC
PERIOD ACTIVATED
8.3 Error conditions
The figure shows an example of an error condition. If
the appliance enters this condition, the display will
show the following information:
8.5 Warning
The figure shows the message:
•
line one: error code comprising a letter and two
digits, followed by the error description;
!!! WARNING !!!
•
lines two to four: alternately, a brief explanation of
the error, and a brief action to resolve the error.
SHORT CYCLE
PREVENTION
S04: SENSOR ERROR
The appliance will continue to run under partial load.
Explanations of the warnings are provided elsewhere
CHECK
SENSOR OR DUMMY
Caution
The displayed action to resolve the error may only
be performed by a service and maintenance engineer.
There are various types of errors:
•
•
LOCK OUT ERRORS
When the cause has been removed, these errors
require a reset with the
appliance can resume operation.
button before the
BLOCKING ERRORS
These errors disappear automatically once the
cause of the error has been removed, after which
the appliance resumes operation by itself.
54
Instruction manual GWV
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9 Starting and running
9.1 Introduction
Topics covered in this chapter, in sequence:
a
•
•
»START OPERATION
^ CHANGE SETPOINT
9.2 Starting and running
Start the appliance as follows:
È
Tset=65ÉC
6. Confirm the START OPERATIONby pressing
.
valve.
The appliance is now in "ON mode". If there is a
heat demand, the appliance will run through the
heating cycle (2.3 "The appliance's heating
3. Switch on the power to the appliance using the
isolator between the appliance and the power
supply.
If the heating cycle is not run, there is no heat
demand; if this is the case, Tset will probably need
4. Switch the electronic controller ON by setting the
ON/OFF switch to position I.
9.3 The appliance's heating cycle
The appliance's heating cycle is activated when the
measured water temperature (T ) falls below the
3
threshold value (T ). This set point value depends on
set
GENESIS
the currently selected appliance operating mode. If the
appliance is in the "OFF mode" (frost protection), for
example, this value is 5°C. If the appliance is in the
"ON mode", this set point can be selected, for
example, 65°C.
The heating cycle runs successively through the
following states:
1. HEAT DEMAND;
2. PRE-PURGE;
3. PRESSURE SWITCH;
4. PRE-GLOW;
IMD-0511 R1
The display will now show INTERNAL CHECKfor
about 10 seconds and go to the main menu.
5. IGNITION;
a
6. RUNNING 1;
INTERNAL CHECK
7. RUNNING 2;
8. POST-PURGE.
The complete cycle is explained in the following
example, which assumes the appliance is in the basic
mode ON
.
a
MENU
Note
»OFF
^ ON
The same heating cycle applies to the other
operating modes.
È WEEK PROGRAM
5. Press the blue arrow once ( ) to position the
cursor in front of ONand press
. The
display shown in the figure will appear.
Instruction manual GWV
55
9
Starting and running
gis
Once the appliance starts, it will run through the
following steps:
5. After a number of seconds pre-glow, the partial
load gas control is opened and ignition takes
place.
1. The water temperature drops below the set
temperature of (for example) 65°C. The electronic
controller detects a demand and starts the heating
cycle.
-
-
The icon is activated.
The IGNITIONmessage appears.
a
-
-
The icon is activated.
ON
Ê
Ê Ê
The message HEAT DEMANDappears.
13:45 Thursday 63ÉC
Tset 65ÉC
a
IGNITION
ON
Ê
13:45 Thursday 63ÉC
Tset 65ÉC
HEAT DEMAND
6. After ignition, the flame is detected and the
appliance will be running. This means that actual
heating has started. The rotational speed of the fan
then increases to the normal running speed for the
partial load phase, and the pressure switch closes:
2. Following heat demand, the fan is powered up and
the pre-purge begins. This lasts about 15 seconds.
During this phase, any residual gases are
removed.
-
-
-
The icon is removed.
The
and icons are activated.
-
-
The icon is activated.
The RUNNING 1message appears.
The message PRE PURGEappears.
a
a
ON
Ê Ê Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
RUNNING 1
ON
Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
PRE PURGE
7. If the temperature difference between T and T
set
3
is greater than the downward hysteresis plus the
stage difference, then second gas control (full loaf
gas control) is opened and the other burners ignite.
3. During the pre-purge, the pressure switch closes.
-
-
The icon is activated.
The message PRESSURE SWITCH
8. After ignition of the full load phase, the flame on
these burners is not detected separately; the
appliance is however operational. The rotational
speed of the fan then increases to the normal
running speed for the fully loaded phase:
appears.
a
ON
Ê Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
-
The RUNNING 2message appears.
PRESSURE SWITCH
a
4. After a little time, the pre-purge ceases and the
electronic controller reduces the speed of the fan
to the rotational speed for ignition. This is followed
by the (pre-)glow of the hot surface igniter.
ON
Ê Ê Ê Ê
13:45 Thursday 63ÉC
Tset 65ÉC
RUNNING 2
-
-
The
and icons are removed.
9. When the water is almost up to temperature (T
set
The icon is activated.
minus stage difference), the gas control for the full
load phase closes and the fan's rate drops to the
revs for the partially loaded phase.
a
ON
Ê
Ê
-
-
The
,
,
and icons remain activated.
13:45 Thursday 63ÉC
Tset 65ÉC
The RUNNING 1message appears.
GLOW PLUG
56
Instruction manual GWV
gis
10. When the water is up to temperature, the heat
demand drops off and the post-purge starts. This
lasts about 25 seconds.
-
-
-
The
,
and icons are removed.
The icon is activated.
The message POST PURGEappears.
a
ON
Ê Ê
13:45 Thursday 65ÉC
Tset 65ÉC
POST PURGE
11. Following the post-purge, the fan stops and the
pressure switch opens:
-
-
The
and icons are removed.
The POST PURGEmessage is removed.
a
ON
14:05 Thursday 65ÉC
With any subsequent heat demand, the heating cycle
will resume from step 1.
Instruction manual GWV
57
9
Starting and running
gis
58
Instruction manual GWV
gis
10 Shutting down
4. Wait until the fan has stopped. The icon then
goes out.
10.1 Introduction
This chapter describes:
5. Switch the appliance OFF (position 0) using the
•
ON/OFF switch on the control panel.
•
•
GENESIS
10.2 Shutting the installation down for a
brief period ("OFF mode")
To shut the installation down for a brief period, you
must activate the frost protection.
You can use the frost protection to prevent water
freezing in the appliance.
Activate the frost protection as follows:
IMD-0511 R1
1. Press the
2. Use and to position the cursor in front of OFF
Confirm with
button to select the main menu.
6. Isolate the appliance from the power supply by
setting the isolator between the appliance and the
mains power supply to position 0.
.
.
10.4 Shutting the appliance and storage
tank down for a long period
OFF
13:45 Thursday 6ÉC
FROST PROTECTION
ACTIVATED
Drain the appliance and storage tank if you are
shutting the installation down for a longer period of
time. Proceed as follows:
1. Isolate the appliance from the power
The frost protection cuts in if the water temperature
drops below 5°C. The text FROSTwill then appear on
line one of the display. The appliance heats the water
to 20°C (T ) and drops back to the OFFmode.
set
2. Shut off the gas supply.
3. Close the stop valve in the hot water pipe.
Note
These values of 5°C and 20°C cannot be adjusted.
4. Close the supply valve of the protected cold supply
setup.
10.3 Isolating the appliance from the mains
5. Open the drain valve
The appliance should only be isolated from mains
power in the correct way. The correct procedure is as
follows:
6. Open the air valves to the appliance and storage
tank so that the water can run out of them
completely.
1. Activate the MENUwith
.
2. Position the cursor in front of OFF
.
3. Confirm OFFwith
.
MENU
»OFF
^ ON
È WEEK PROGRAM
Caution
Failure to wait until the fan stops purging can
cause damage to the appliance.
Instruction manual GWV
59
10
Shutting down
gis
60
Instruction manual GWV
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11 Main menu
Confirm with
This means:
1. : Activate the main menu with
2. SETTINGS: Use the and/or buttons to go to
SETTINGSand confirm with
.
11.1 Introduction
The MENUis reached by pressing the
button of the
electronic controller.
.
MENU
»OFF
.
^ ON
È WEEK PROGRAM
3. LANGUAGE: Use the and/or buttons to go to
LANGUAGE
EXTRA PERIOD
SETTINGS
4. Confirm with
. After entering
, you
will have activated the LANGUAGEsubmenu.
11.3 Switching on the "ON mode"
The main menu comprises:
•
OFF
You can switch the appliance to the ONmode from any
Select this option if you wish to shut the appliance
do not wish to drain it. In this mode, the frost
protection is active. This prevents water from
freezing in the appliance.
operational mode, as follows:
1.
:
ON START OPERATION
|
Confirm with
.
Note
•
•
ON
First consult the chapter about switching
In this mode, the appliance continually responds to
the hot water demand (11.3 "Switching on the "ON
11.4 Setting the water temperature
WEEK PROGRAM
Select this option to allow the appliance to respond
to demand only during pre-programmed
periods, only frost protection is active.
11.4.1
Setting the water temperature via
the SET POINT menu
The water temperature can be adjusted between 40°C
and 85°C.
•
•
EXTRA PERIOD
Set the water temperature via:
Use this option to overrule the OFF ONor PROG
,
positions (=weekly program) to meet the demand
for hot water for a temporary period (11.10 "Extra
1.
:
ON
|
CHANGE SETPOINT
Confirm with
.
SETTINGS
language and the time. You can also use this
option to display the control range (temperature),
and the ignition and running speeds of the fan.
START OPERATION
^»CHANGE SETPOINT
È
Tset=65ÉC
2. Use:
Note
•
•
to increase the value;
to decrease the value.
If you fail to make any selection with the main
menu open, then after 30 seconds, the appliance will
automatically return to the mode it was previously in.
11.2 Notationalconventionformenu-related
instructions
The MENU
(
) of the electronic controller is divided
into submenus. For example, SETTINGSis one of the
functions reached from the main menu. The
SETTINGSmenu is divided into submenus in turn.
For example, LANGUAGEis a submenu of
SETTINGS. So, for example, to select the
LANGUAGEmenu, this manual uses the following
notational convention:
•
:
SETTINGS LANGUAGE
|
Instruction manual GWV
61
11
Main menu
gis
•
Confirm with
appliance enters "ON mode".
.After confirming, the
•
•
•
•
SET POINT
» 65ÉC
11.6 Starting and stopping the week
program
The week program can be started up from any other
operating mode, as follows:
Note
If the temperature setting is higher than the current
water temperature, it is possible that the appliance will
not immediately start heating. To prevent excessively
frequent switching on and off, there is a heating
margin. The standard margin setting is 4°C. The
appliance starts heating up if the water temperature is
4°C below the SETPOINT.
1.
:
WEEK PROGRAM
|
START OPERATION
Confirm with
.
A week program can be shut down simply by
activating a different operating mode, for example the
"ON mode".
We refer to this margin as the hysteresis. The service
and maintenance engineer can set (12.2 "Setting the
hysteresis") the hysteresis value.
11.7 Changing the appliance's standard
week program
Note
11.4.2
Setting water temperature during
ON mode
First enter the desired week program on the
program card supplied.
The water temperature can also be directly adjusted
when the appliance is in the "ON mode". Simply use:
A week program is made up of a number of
programmable periods in which you can have the
appliance switch on and off. A period consists of:
•
•
•
to increase the value;
to decrease the value.
•
switch-on time: day of the week, hours and
minutes:
Confirm with
.
•
•
•
switch-off time: hours and minutes;
the water temperature setting;
ON
13:45 Thursday 65ÉC
Tset»65ÉC
on/off setting for a program-controlled pump.
Note
11.5 Week program
The switch-on and switch-off times may only be on
the same day of the week. A maximum of three
periods may be programmed per day. You can
program a maximum of 21 periods.
Using the week program, you can set the water
temperature for the days and times you want.
If the appliance is running under a week program, this
is indicated on the display by the PROGtext on the first
line (see the figure). The second line shows the time
of day, the day of the week and the temperature. The
third line shows the next switching time of the week
program and the programmed temperature. The fourth
line shows the PROGRAM ACTIVATEDtext.
Call the menu for the week program up as follows:
•
:
WEEK PROGRAM PROGRAM OVERVIEW.
|
Confirm with
.
WEEK PROGRAM
START OPERATION
PROG
07:55 Monday
^»PROGRAM OVERVIEW
È
64ÉC
MO 08:00 Tset 75ÉC
PROGRAM ACTIVATED
The appliance's default week program switches the
appliance on every day at 00:00 and off at 23:59. The
default water temperature setting is 65°C.
If you want, you can change every setting in the
appliance's standard week program.
If the water temperature becomes too low while the
week program is running, the appliance will run
through the heating cycle (2.3 "The appliance's
heating cycle") and return to the week program.
This following are discussed:
62
Instruction manual GWV
gis
The display shows the menu for the week program
(see figure below). With the default setting, the
program switches on and off every day at 00:00 and
23:59 respectively, the water temperature is 65ºC and
The cursor moves to the minute digits, which flash.
ON SU 08»15
OFF SU 08:15
Tset 65ÉC
the pump is switched on (
P).
PUMP ON
SAVE
DAY TIME Tset
ON »SU 00:00 65ÉC P
OFF SU 23:59
ON MO 00:00 65ÉC P
Note
Because the switch-off time can never be earlier
than the switch-on time, the switch-off time setting is
automatically adjusted with the switch-on time.
OFF MO 23:59
ON TU 00:00 65ÉC P
OFF TU 23:59
4. Use and to set the minutes. In the example,
ON WE 00:00 65ÉC P
OFF WE 23:59
ON TH 00:00 65ÉC P
OFF TH 23:59
ON FR 00:00 65ÉC P
OFF FR 23:59
ON SA 00:00 65ÉC P
OFF SA 23:59
this is 15
.
Confirm with
.
The cursor moves to the switch-off hour digits,
which flash.
ON SU 08:15
OFF SU»08:15
Tset 65ÉC
INSERT
DELETE
PUMP ON
SAVE
START OPERATION
11.7.2
Week program: setting switch-off
time
Example
1. Use and to set the hour. In the example, this
is 12
As an example, we will set the switch-on time for
Sunday to 08:15 and the corresponding switch-off
time to 12:45. The water temperature will be set to
75ºC and the pump will run continuously.
The following settings are entered one by one using
the menus: the switch-on time, the switch-off time, the
desired water temperature and the mode of the
program-controlled pump.
.
Confirm with
.
The cursor moves to the minute digits, which flash.
ON SU 08:15
OFF SU 12»15
Tset 65ÉC
PUMP ON
SAVE
11.7.1
Week program: setting the switch-
on time
2. Use and to set the minutes. In the example,
this is 45
.
1. Position the cursor at SU
Confirm with
.
Confirm with
.
The cursor moves to the desired water
temperature.
ON »SU 08:00
OFF SU 08:00
Tset 65ÉC
ON SU 08:15
OFF SU 12:45
Tset»65ÉC
PUMP ON
SAVE
PUMP ON
SAVE
The day indicated by the
»
will blink.
2. Use and to set the desired day. In the
11.7.3
Week program: setting the water
temperature
example, this is SU(Sunday).
Confirm with
.
1. Use and to set the water temperature. In the
example this is 75°C.
ON SU»08:00
OFF SU 08:00
Tset 65ÉC
Confirm with
.
The cursor moves to PUMP ON
PUMP ON
SAVE
ON SU 08:15
OFF SU 12:45
Tset 75ÉC
The cursor moves to the hour digits, which flash.
3. Use and to set the hour. In the example, this
PUMP»ON
SAVE
is 08
.
Confirm with
.
Instruction manual GWV
63
11
Main menu
gis
The display shows the menu for the week
program. The cursor points to the active period.
11.7.4
Week program: setting the program-
controlled pump
1. If required, a pump can be controlled during the
period. Use and to set PUMP ON The pump
ensures a regular circulation of hot water in the hot
water pipes. You can skip this step if you there is
no pump in your hot water circuit.
DAY TIME Tset
ON »SU 08:15 75ÉC P
OFF SU 12:45
ON MO 00:00 65ÉC P
....................
....................
OFF SA 23:59
INSERT
Confirm with
.
The cursor moves to
SAVE.
ON
SU 08:15
OFF SU 12:45
Tset 75ÉC
DELETE
START OPERATION
2. Scroll to INSERT
.
PUMP ON
»SAVE
Confirm with
.
2. Confirm with
.
The submenu for adding a period will appear.
The display shown in the figure will appear.
ON »SU 08:15
OFF SU 12:45
Tset 65ÉC
DAY TIME Tset
ON »SU 08:15 75ÉC P
OFF SU 12:45
PUMP ON
SAVE
ON MO 00:00 65ÉC P
OFF MO 23:59
ON TU 00:00 65ÉC P
OFF TU 23:59
Example
Asan example, we will program an extra period in
which the switch-on time is set to 18:00, and the
switch-off time to 22:00. The water temperature will be
set to 75ºC and the pump will run continuously.
3. If you wish, you can use to scroll to another day,
and change more switch-on (11.7.1 "Week
program: setting the switch-on time") and switch-
DAY TIME Tset
ON »SU 18:00 75ÉC P
OFF SU 22:00
ON MO 00:00 65ÉC P
4. After changing all desired switch-on and switch off
times, you can start running the week program:
OFF MO 23:59
....................
....................
OFF SA 23:59
INSERT
Use to scroll to START OPERATION
.
Confirm with
.
11.8 Adding times to a week program
DELETE
START OPERATION
The menu for INSERTswitch-on and switch-off times
to a week program is reached via:
3. Do the following:
1.
:
WEEK PROGRAM
Confirm with
WEEK PROGRAM
START OPERATION
|
PROGRAM OVERVIEW.
.
^»PROGRAM OVERVIEW
È
d. Set the program-controlled
5. To activate the week program with the new period
added, scroll to START OPERATIONand
confirm with
.
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Instruction manual GWV
gis
11.9 Deleting times from a week program
3. The lines showing switch-on/off times are replaced
by DELETE BLOCK?. See the figure.
All switch-on/off times are shown sequentially in the
display. Assume that the switch-on/off times for the
appliance are programmed as in the figure.
Confirm with
(or use
to cancel)
DAY TIME Tset
DAY TIME Tset
ON »SU 08:15 75ÉC P
OFF SU 12:45
ON
OFF
DELETE
BLOCK?
ON MO 00:00 65ÉC P
ON SU 18:00 75ÉC P
OFF SU 22:00
....................
....................
OFF SA 23:59
INSERT
The switching period has been deleted. You will return
now to the week program menu. The cursor points to
the first programmed period.
DAY TIME Tset
ON SU 08:15 75ÉC P
OFF SU 12:45
DELETE
START OPERATION
ON MO 00:00 65ÉC P
To delete a period, proceed as follows:
OFF MO 23:59
....................
....................
OFF SA 23:59
INSERT
WEEK PROGRAM
START OPERATION
^»PROGRAM OVERVIEW
È
DELETE
START OPERATION
The display shows the menu for the week
program.
4. Use to scroll to START OPERATION
Confirm with
.
1. Scroll to DELETE
.
.
Confirm with
.
The week program is active.
To warn you that you are now working in the
"delete" submenu, the cursor is replaced with an
exclamation mark (!) and the period settings flash.
11.10 Extra period
Use an extra period when you either want to have the
appliance switch on and off for a certain period, either
without modifying the active week program, or without
taking the appliance out of the ON or OFF mode (frost
protection active).
DAY TIME Tset
ON !SU 08:15 75ÉC P
OFF SU 12:45
ON SU 18:00 75ÉC P
If the appliance is running an "extra period", this is
OFF SU 22:00
....................
....................
OFF SA 23:59
INSERT
indicated in the display with EXTRA
.
EXTRA
10:00 Monday
76ÉC
MO 11:15 Tset 75ÉC
PERIOD ACTIVATED
DELETE
START OPERATION
If the water temperature becomes too low during the
extra period, the appliance will run through the heating
back into the extra period.
2. Scroll with to the day to be deleted. For
example, the second period on SU(Sunday). See
the figure.
Confirm with
.
The same settings can be made for an extra period as
for a week program (11.7 "Changing the appliance's
standard week program") period.
DAY TIME Tset
ON !SU 18:00 75ÉC P
OFF SU 22:00
ON MO 00:00 65ÉC P
OFF MO 23:59
....................
....................
OFF SA 23:59
INSERT
DELETE
START OPERATION
Instruction manual GWV
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11
Main menu
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The cursor moves to the minute digits, which flash.
11.11 Programming an extra period
1. Call up the menu for entering an extra period via:
ON
SU 08:15
OFF SU 12»15
Tset 65ÉC
2.
:
EXTRA PERIOD
Confirm with
MENU
ON
.
PUMP ON
START
2. Use and to set the minutes. In the example,
this is 45
.
^ WEEK PROGRAM
ȻEXTRA PERIOD
Confirm with
.
The cursor moves to the water temperature. See
the figure.
The display show the settings for the extra period.
11.11.1 Setting the switch-on time
ON
SU 08:15
OFF SU 12:45
Tset»65ÉC
1. Use and to set the day. In the example, this is
SU
Confirm with
The cursor moves to the hour digits, which flash.
.
PUMP ON
START
.
11.11.3 Setting the water temperature
ON
SU»08:00
OFF SU 08:00
Tset 65ÉC
1. Use and to set the water temperature. In the
example this is 75°C.
Confirm with
.
PUMP ON
START
The cursor moves to PUMP ON
2. Use and to set the switch-on hour to the
desired value. In the example, this is 08
ON
SU 08:15
OFF SU 12:45
Tset 75ÉC
.
Confirm with
.
PUMP»ON
START
The cursor moves to the minute digits, which flash.
ON
SU 08»15
OFF SU 08:15
Tset 65ÉC
11.11.4 Setting the program-controlled
pump
1. If required, a pump can be controlled during the
period. Use and to set PUMP ONThe pump
ensures a regular circulation of hot water in the hot
water pipes. You can skip this step if you there is
no pump in your hot water circuit.
PUMP ON
START
Note
Because the switch-off time can never be earlier
than the switch-on time, the switch-off time setting is
automatically adjusted with the switch-on time.
Confirm with
.
The cursor moves to START
.
3. Use and to set the minutes. In the example,
ON
SU 08:15
OFF SU 12:45
Tset 75ÉC
this is 15
.
Confirm with
.
The cursor moves to the hour digits of the switch-
off period.
PUMP ON
»START
2. Confirm with
.
ON
SU 08:15
OFF SU»08:15
Tset 65ÉC
The extra period has been programmed.
Note
PUMP ON
START
When the extra period is finished, the controller
returns to the ON, OFF or WEEK PROGRAMmode.
The following week, the extra period will NOT be
switched on automatically.
11.11.2 Setting the switch-off time
1. Use and to set the hour. In the example, this
is 12
.
Confirm with
.
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11.12 Settings
11.12.2 Setting day and time
Using the SETTINGSoption, you can adjust certain
To enter the time and day:
settings and read certain appliance data:
MENU
•
•
Adjustable settings
WEEK PROGRAM
^ EXTRA PERIOD
ȻSETTINGS
-
-
Language of the menu.
Current day of week and time.
Displayable appliance specifications, this
category is only relevant to the installation
engineer and/or service and maintenance
engineer
1. Call up the menu for entering the day and time as
follows:
2.
:
SETTINGS
Confirm with
The display shows the menu for settings.
.
.
-
-
-
Control range (water temperature).
Ignition speed of fan.
3. Scroll to DAY
/
TIMEusing and
Working speed of fan.
Confirm with
.
11.12.1 Setting menu language
SETTINGS
LANGUAGE
^»DAY/TIME
To set menu language:
MENU
WEEK PROGRAM
^ EXTRA PERIOD
ȻSETTINGS
È SPECIFICATIONS
The display shows the submenu for adjusting the
day.
1. Call up the menu for selecting the language as
follows:
DAY
»Sunday
Monday
Tuesday
2.
:
SETTINGS
Confirm with
The display shows the menu for settings.
.
.
Wednesday
Thursday
Friday
SETTINGS
»LANGUAGE
^ DAY/TIME
È SPECIFICATIONS
Saturday
4. The cursor is positioned in front of Sunday
Scroll to the desired day using and
Confirm with
.
.
3. The cursor is positioned in front of LANGUAGE
.
Confirm with
.
The day has been set. The display shows the
submenu for adjusting the time.
The display shows the language selection menu.
LANGUAGE
TIME
ENGLISH
»00:00
^ NEDERLANDS
ȻDEUTSCH
FRANCAIS
ITALIANO
CZECH
5. The cursor moves to the hour digits, which flash.
Scroll w to the current hour, for example 15, using
and
Confirm with
TIME
.
4. Scroll to the desired language with
.
.
Confirm with
.
The language is set.
15»00
6. The cursor moves to the minute digits, which flash.
Scroll to the minute to come, for example 45, using
and
.
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11
Main menu
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Confirm the minute setting with
Confirm with
.
TIME
SETTINGS
15»45
LANGUAGE
^ DAY/TIME
ȻSPECIFICATIONS
The time has been set.
The display shows the submenu for displaying
appliance specifications.
Note
SPECIFICATIONS
The appliance takes no account of summer time.
»
REGULATION INTERVAL
IGNITION SPEED
WORKING SPEED
^
È
11.12.3 Displaying appliance specifications
3. Scroll with to the section to be displayed, for
Note
example REGULATION INTERVAL
.
This category is only relevant to the installation
engineer and/or service and maintenance engineer.
The relevant display appears.
The table shows the correct settings.
REGULATION INTERVAL
40_85ÉC
GWV 120
Ignition rotation
speed (rpm)
1620
Working revs 1
(partial load)
(rpm)
2040
Working revs 2 (full
2340
load)
(rpm)
Adjustability
( C)
40 - 85
o
GWV 150
GWV 200
Ignition rotation
speed (rpm)
1500
1800
Working revs 1
(partial load)
(rpm)
2340
2460
Working revs 2 (full
2700
2820
load)
(rpm)
Adjustability
( C)
40 - 85
40 - 85
o
Bring up the menu to display the appliance
specifications via:
1.
:
SETTINGS
Confirm with
MENU
WEEK PROGRAM
.
.
^ EXTRA PERIOD
ȻSETTINGS
2. Scroll to SPECIFICATIONS
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Instruction manual GWV
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12 Service program
•
:
HYSTERESIS DOWN
12.1 Introduction
The figure shows an example.
The service program is used by the installation
engineer or service and maintenance engineer for:
•
•
•
•
•
•
•
•
•
•
•
HYSTERESIS DOWN »4ÉC
12.3 Displaying the error history
Display the error history as follows:
•
:
HISTORY OF ERRORS
The controller will display an overview of "Blocking
errors" and "Lock out errors". In both cases, the
electronic controller reserves 15 lines for the last 15
error messages. If there are fewer than 15 error
messages, three points (...) are displayed. The display
first shows the "Blocking errors". When
is
pressed, the "Lock out errors" are displayed.
SERVICE MENU
»HYSTERESIS
^ HISTORY OF ERRORS
È APPLIANCE HISTORY
The figure shows an example of "Blocking errors". The
HISTORY OF ERRORStext is followed by (B)
.
HISTORY OF ERRORS(B)
S04 SENSOR ERROR
F06 IONISATION
SELECT APPLIANCE
PUMP RELAY
SERVICE INTERVAL
DISPLAY CONTRAST
BACKLIGHT TIME
SCROLL SPEED
È CO2 50 HZ ERROR
The figure shows an example of "Lock out errors". The
HISTORY OF ERRORStext is now followed by (L)
.
STAGE DIFFERENCE
PUMP POST PURGE
HISTORY OF ERRORS(L)
F02 FAN
F07 FLAME ERROR
È ...
These submenus are briefly described in the following
paragraphs. If you are not familiar in general with how
to use the displays and menus, first read the
Note
For an overview of all errors and the possible
causes, please refer to the relevant
Note
The notation convention for the service menu is
identical to that of the main menu (11.2 "Notational
difference is that you use
program, instead of , which calls up the main menu.
12.4 Displaying the appliance history
to call up the service
The appliance history submenu is used to display the
burning hours, the number of ignitions, the number of
flame errors and the number of ignition errors.
12.2 Setting the hysteresis
Call up the menu for displaying the appliance history
as follows:
If the preset temperature (SET POINT) is higher than
the current water temperature, the appliance might not
immediately start the heating cycle (2.3 "The
appliance's heating cycle"). This is caused by the built-
in safety margin. To prevent excessively frequent
switching on and off, there is a heating margin. This
margin is called the hysteresis. The hysteresis can be
set DOWN (negative hysteresis). The hysteresis can
be adjusted between 2°C and 7°C.
•
:
APPLIANCE HISTORY
The figure shows an example.
Set the hysteresis DOWN as follows:
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12
Service program
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The service interval is based on the number of burning
hours. This can be set to 500, 1000 and 1500 hours.
The standard setting for number of hours is 500. Once
the preset number of hours is reached, a
appear. Adjust the service interval via:
APPLIANCE HISTORY
BURNINGHOURS 000410
^IGNITIONS
001000
ÈFLAME ERRORS 000021
IGNIT ERROR 000013
•
:
SERVICE INTERVAL
SERVICE INTERVAL
» 500
^ 1000 BURNING HOURS
È 1500
12.5 Displaying the appliance selection
To display the appliance selection, use:
•
:
SELECT APPLIANCE
12.8 Setting the display contrast
The appliance number can be found on the rating
plate.
Set the display contrast as follows:
•
:
DISPLAY CONTRAST
The appliance selection has been correctly preset
in the factory.
The default setting is 100%. The range is 0 to
100%.
SELECT APPLIANCE
»5934
The figure shows the related display.
^ 8576
È 3379
DISPLAY CONTRAST
6527
2331
3908
2510
7767
» 90 %
12.9 Setting the display backlight switching
period
Set the backlight time (the time that the display
backlight remains lit after the last button is pressed) as
follows:
12.6 Switching the pump on or off
If a program-controlled pump is
installed (3.10.4 "Connecting a program-controlled
pump") then this can be turned ON or OFF via:
•
:
BACKLIGHT TIME
The default value is 255 seconds. The range is 0
to 255 seconds.
•
:
PUMP RELAY
The standard setting for the pump is OFF.
The figure shows the related display.
PUMP RELAY
»ON
BACKLIGHT TIME
OFF
» 255 sec
If the WEEK PROGRAMor EXTRA PERIODmodes
are active, then the setting for the WEEK PROGRAMor
EXTRA PERIODmodes takes priority over the
ON/OFF selection for the pump relay in the service
menu.
12.10 Setting the display scroll speed
Adjust the control speed via:
•
:
SCROLL SPEED
The default is 10. The range is from 0 through 100.
Setting the value too high or low will make scrolling
difficult.
Example
One of the week program periods is active. During this
period, the pump relay setting is OFF. If the pump relay
is set ON in the service menu, the pump will
nonetheless remain OFF. The pump will only switch
ON once the week program period has ended.
SCROLL SPEED
» 10
12.11 Setting the stage difference for the
appliance
12.7 Setting the service interval
To aid servicing, the electronic controller includes a
service interval which is used to set the frequency of
maintenance interval (14.2 "Determining service
interval") by the service and maintenance engineer,
based on the number of burning hours.
Switching from partial load to full load is handled by
the electronic controller, using the stage difference.
This value is adjustable.
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Instruction manual GWV
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The appliance switches from partial load to full load if
the temperature difference between the water in the
storage tank (T ) and the set point (T ) minus the
3
set
negative hysteresis is greater than this stage
difference. Conversely, the apparatus switches from
full load to partial load if this temperature difference is
smaller than the stage difference.
The stage difference can be adjusted between 2°C
and 8°C. The default stage difference is 5°C.
You can set the stage difference using:
•
:
STAGE DIFFERENCE
The figure shows an example.
STAGE DIFFERENCE
» 5ÉC
12.12 Setting the pump running-on time
Once the heat demand has been met, the heating
cycle stops but the pump continues to run for a short
time. The run-on time can be set to 45, 90 or 180
seconds. The default setting is 45 seconds. You can
set the run-on time using:
•
:
PUMP POST PURGE
The figure shows an example.
PUMP POST PURGE
» 45 sec
90
180
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Service program
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13 Troubleshooting
A distinction is made between:
13.1 Introduction
•
General errors
General errors are not reported on the display. General errors are:
-
-
-
-
-
Gas smell
Display does not light up
Insufficient or no hot water.
Water leakage
Explosive ignition.
table with general errors.
•
Displayed errors
Errors are reported on the display as follows:
-
One: a code plus a brief description. The code consists of a letter and
two digits.
-
Two, three and four: a long description, alternating with a
recommended action every two seconds. See the figures. The first
shows a possible error, the second shows the appropriate checking
action.
S02: SENSOR ERROR
HOT WATER OUTLET
SENSOR 1 NOT
CONNECTED
S02: SENSOR ERROR
CHECK OUTLET SENSOR
HEAT EXCHANGER
There are various types of errors, all falling into one of two groups:
-
-
LOCK OUT ERRORS
When the cause has been removed, these errors must be reset with
the
button before the appliance can resume operation.
BLOCKING ERRORS
These errors disappear automatically when the cause of the error is
removed, after which the appliance resumes operation by itself.
table of error messages that can appear on the display.
•
Displayed warnings
be reset by pressing the
button and then
.
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13.2 Troubleshooting table for general errors
Warning
General errors
Features
Cause
Comment
Gas smell
Gas leak
Warning
Contact your installation engineer or local gas company
immediately.
Close the main gas valve immediately.
Do not operate any switches.
Warning
No naked flames.
Warning
Ventilate the boiler room.
Display is off
Appliance is turned off Start the appliance up (9 "Starting and running")
No supply voltage
present
1. Check if the isolator is ON.
See the GWV electrical diagram (17 "Appendices")
If the error persists, consult your installation engineer.
2. Check that there is power to the isolator.
3. Check whether the ON/OFF switch of the electronic controller is
ON (position I).
4. Check whether there is power to the electrical connector block.
5. The measured voltage must be 230 VAC (-15%, +10%).
Replace fuse(s)
Defective fuse(s)
To replace the fuses, you must contact your installation engineer.
If the leak persists, consult your installation engineer
Water leakage
Leakage from a water Tighten the threaded connection
connection (threaded)
Leakage from another Trace the leak
nearby water appliance
or pipe segment
Leak from the storage Consult the supplier and/or manufacturer
tank
Instruction manual GWV
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is
Features
Measures to take
Comment
Explosive ignition
If ignition is not improved, consult your installation engineer.
pressure")
Hot water supply
insufficient or absent
See the GWV electrical diagram (17 "Appendices")
If the error persists, consult your installation engineer.
ON (position I).
Hot water supply is
used up
Reduce hot water consumption and give the appliance time to heat If there continues to be insufficient hot water, or none at all, consult
up. your installation engineer.
The controller is in OFF Switch the controller to the ON mode (11.3 "Switching on the "ON
mode. mode"")
Temperature (T ) is
set too low.
Adjust (11.4 "Setting the water temperature") temperature (T ) to
a higher value.
set
set
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13.3 Troubleshooting table for displayed errors
Displayed errors
Code + description
S01 (blocking error)
Cause
Measures to take
Comment
Sensorisnot(correctly) Connect the sensor lead to JP3
connected
See the GWV electrical diagram (17 "Appendices")
Open circuit for
temperature sensor T ,
inlet to heat exchanger
Damaged cable or
defective sensor
Replace sensor T
To replace the necessary parts, you must contact your installation
engineer
1
1
S02 (blocking error)
Sensorisnot(correctly) Connect the sensor lead to JP5
connected
See the GWV electrical diagram (17 "Appendices")
Open circuit for sensor
1 of temperature
(1)
Damaged cable or
defective sensor
Replace sensor T2
To replace the necessary parts, you must contact your installation
engineer
sensor T , outlet of
2
heat exchanger
S03 (blocking error)
Sensorisnot(correctly) Connect the sensor lead to JP5
connected
See the GWV electrical diagram (17 "Appendices")
Open circuit for sensor
2 of temperature
(1)
Damaged cable or
defective sensor
Replace sensor T2
To replace the necessary parts, you must contact your installation
engineer
sensor T , outlet of
2
heat exchanger
S04 (blocking error)
Dummy is not
(correctly) connected
Connect the dummy sensor (dummy sensor 1 and 2) leads to JP4. See the GWV electrical diagram (17 "Appendices")
Open circuit in
dummy 1
(1)
Defective dummy
Replace the dummy sensor
To replace the necessary parts, you must contact your installation
engineer
S05 (blocking error)
Dummy is not
(correctly) connected
Connect the dummy sensor (dummy sensor 1 and 2) leads to JP4. See the GWV electrical diagram (17 "Appendices")
Open circuit in
dummy 2
(1)
Defective dummy
Replace the dummy sensor 2
To replace the necessary parts, you must contact your installation
engineer
S06 (blocking error)
Sensorisnot(correctly) Connect the sensor lead to JP5
connected.
See the GWV electrical diagram (17 "Appendices")
Open circuit for
Damaged cable or
defective sensor
Replace the sensor
To replace the necessary parts, you must contact your installation
engineer
temperature sensor T
at the bottom of the
storage tank.
3
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Code + description
S11 (blocking error)
Cause
Measures to take
Comment
Short circuit in sensor Replace sensor T
circuit
To replace the necessary parts, you must contact your installation
engineer
1
2
2
Short-circuit for
temperature sensor T ,
inlet to heat exchanger
1
(1)
(1)
S12 (blocking error)
Short circuit in sensor Replace sensor T
circuit
To replace the necessary parts, you must contact your installation
engineer
Circuit for sensor 1 of
temperature sensor T
is shorted.
2
S13 (blocking error)
Short circuit in sensor Replace sensor T
circuit
To replace the necessary parts, you must contact your installation
engineer
Short-circuit for sensor
2 of temperature
sensor T , outlet of
2
heat exchanger
(2)
(2)
S14 (blocking error)
Short circuit in sensor Replace the dummy sensor
circuit
To replace the necessary parts, you must contact your installation
engineer
Short circuit from
dummy 1
S15 (blocking error)
Short circuit in sensor Replace the dummy sensor
circuit
To replace the necessary parts, you must contact your installation
engineer
Short circuit from
dummy 2
S16 (blocking error)
Short circuit in sensor Replace sensor T
circuit
To replace the necessary parts, you must contact your installation
engineer
3
Circuit for temperature
sensor T at the bottom
3
of the storage tank is
shorted
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Cause
Measures to take
Comment
Live and neutral
connected wrong way the appliance is phase-sensitive
round
Connect live and neutral correctly (3.10 "Electrical connection");
See the GWV electrical diagram (17 "Appendices")
circuit
Condensation on the
flame probe
1. Disconnect the lead at the flame probe
If the error persists, contact your installation engineer
2. Ignite the appliance three times, with an interrupted ionisation
circuit
3. Reconnect the ionisation lead to the flame probe
4. Ignite the appliance again
5. The repeated ignition attempts will have caused the
condensation to evaporate
F02 (lock out error)
Damaged wiring
1. Check the wiring between the fan and the controller.
2. If any wires are damaged, the wiring harness must be replaced.
3. Reset appliance controller
See the GWV electrical diagram (17 "Appendices")
Fan fails to run at
correct speed.
To have the wiring replaced and a new fan fitted, you must contact
your installation engineer
Dirty or blocked fan
1. Check if the fan is dirty
2. Check that the rotor can rotate freely
3. Reset appliance controller
Because of a drop in
the supply voltage, the
fan is not running at the
correct speed.
1. Check the supply voltage, this must be 230 VAC (-15%, +10%).
2. Reset appliance controller
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Code + description
F03 (lock out error)
Cause
Measures to take
Comment
circuit
If the error cannot be resolved or is persistent, contact your
installation engineer
controller
The pressure switch
fails to work correctly
To replace the necessary parts, you must contact your installation
engineer
Pressure switch not
closing
air supply hose for the fan. If necessary, replace the hoses.
4. Check that the flue gas outlet is compliant (3.9 "Air supply and
pressure difference, clean the heat exchanger. If the pressure
differential is acceptable, check that the pressure switch is
closing, using a multimeter.
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Code + description
F04 (lock out error)
Cause
Measures to take
Comment
No gas
1. Open the main gas valve and/or the manual gas valve supplying To repair the gas supply, contact your installation engineer
the water heater
Three unsuccessful
ignition attempts.
2. Check the supply pressure to the gas control
3. If necessary, repair the gas supply
Air in the gas pipes
No burner pressure
Bleed the air out of the gas pipe
See Checking the supply pressure and burner pressure for how to
bleed air from the gas line, and measure the supply pressure and
burner pressure.
To replace the necessary parts, you must contact your installation
engineer
1. Check the burner pressure to the gas control
2. Check that the gas valve(s) open and shut correctly
3. If necessary, replace the gas control.
Defect in the hot
1. Check that the hot surface igniter is correctly connected (JP2). If the error persists, contact your installation engineer.
surface igniter circuit
To replace the necessary parts, you must contact your installation
engineer
lie between 2 and 5 ohms.
Defect in the ionisation 1. Check that the flame probe is correctly connected (JP2)
circuit
2. Check the wiring of the flame probe
3. Measure the ionisation current. This must be at least 1.5
microamps.
4. Replace the wiring if necessary.
Supply voltage too low Check the supply voltage, this must be 230 VAC (-15%, +10%).
F05 (lock out error)
Incorrect roof or wall
conduit.
1. Check that the correct roof or wall flue conduit (3.9 "Air supply If the error cannot be resolved or is persistent, contact your
installation engineer
and flue") has been fitted.
Too many flame errors Recirculating flue
have been signalled. gases.
2. If necessary, install the correct roof or wall conduit.
3. Check that the roof or wall conduit discharges into a permitted
area.
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Code + description
F06 (blocking error)
Cause
Measures to take
Comment
Damaged cable in
contact with metal
surface.
Check the wiring of the flame probe. Replace the wiring if
necessary..
If the error persists, contact your installation engineer.
To replace the necessary parts, you must contact your installation
engineer.
Short circuit between
flame probe and earth
Ceramic part of the
flame probe is
broken/cracked.
1. Check that the ceramic part of the flame probe is still intact in
the vicinity of the burner's air distribution plate.
2. If not, the flame probe must be replaced.
F07 (lock out error)
Defective gas valves
1. Check whether there is still burner pressure present after the
gas valves have closed.
If the error cannot be resolved or is persistent, contact your
installation engineer
A flame has been
detected after the gas
valve was closed.
To replace the necessary parts, you must contact your installation
engineer
2. Check whether a flame is still present after the gas valves have
closed.
3. If this is the case, the gas control must be replaced.
F08 (lock out error)
Flame detection before 1. Reset electronic controller.
the gas valve opened.
If the error cannot be resolved or is persistent, contact your
installation engineer
2. If the error appears again, replace the electronic controller.
Error message from
safety relay
To replace the necessary parts, you must contact your installation
engineer
3. If this is the case, the gas control must be replaced.
F09 (lock out error)
Temperature T , T or 1. Check that the system pump is functioning.
Error F09 remains active in the event that the water temperature
during a reset was higher than 90 C. If this is the case, first draw
water off by opening the nearest hot water tap, so that cold water
can flow in.
1
2
o
o
T is greater than 99 C.
3
2. Check the position of the temperature sensor T ., T and T .
1
2
3
Water temperature
safety.
3. Reset appliance controller
If the error cannot be resolved or is persistent, contact your
installation engineer
Instruction manual GWV
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is
Code + description
F10 (lock out error)
Cause
Measures to take
Comment
Pressure switch not
closing
1. Check the running speed of the fan
If the error cannot be resolved or is persistent, contact your
installation engineer
To replace the necessary parts, you must contact your installation
engineer
2. Check that the hoses are fitted correctly to the pressure switch
and the ventilator's air supply hose. Refit them if necessary
Restriction on the
number of ignition
attempts based on
pressure switch state
changes.
3. Check for cracks in the hoses on the pressure switch and in the
air supply hose for the fan. If necessary, replace the hoses.
4. Check that the flue gas outlet is satisfactory.
5. Measure the pressure differential across the pressure switch.
See the table (2.4.5 "Pressure switch"). If there is insufficient
pressure difference, clean the heat exchanger. If the pressure
differential is acceptable, check that the pressure switch is
closing, using a multimeter.
F11 (blocking error)
Defective gas valves
See F07.
Flame detection with
closed gas valve.
F16 (lock out error)
Flow switch does not
close
Component is not
(correctly) connected
Remove the protective cap from the flow switch and connect the
wires to terminals COMM and N.O.
If the error cannot be resolved or is persistent, contact your
installation engineer
Component is not
(correctly)connectedto
the controller
Connect the component's controller to connector JP!2.
See the GWV electrical diagram (17 "Appendices")
Blocked vane switch
Disassemble the flow switch from the T-piece and remove any lime For repairing and cleaning the component, contact your installation
accretions or baked-on dirt from the van switch. engineer.
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is
Code + description
C02 (lock out error)
Cause
Measures to take
Comment
Incorrect reference
voltage from the AD
converter.
1. Reset electronic controller.
To replace the necessary parts, you must contact your installation
engineer
appliance controller.
electronic controller.
from the appliance
controller.
•
EEPROM read
error
•
•
50 Hz error
Internal
communication
error
from the appliance
controller.
•
Gas valve relay
error
•
•
•
•
•
Safety relay error
Ignition relay error
RAM error
EEPROM error
EEPROM contents
do not match the
software version
•
Processor software
error
C04 (blocking error)
Incorrect appliance
selection / Incorrect
selection resistor
1. Check whether the correct appliance is
If the error cannot be resolved or is persistent, contact your
installation engineer
To replace the necessary parts, you must contact your installation
engineer
selected (12.5 "Displaying the appliance selection").
Appliance selection
error
2. If the correct appliance is selected, fit the correct selection
resistor.
3. If incorrect appliance selected, select the correct one.
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is
Code + description
E03 (lock-out error)
Cause
Measures to take
Comment
The two temperature
sensors in the tank
1. Check sensor position and wiring.
To replace the necessary parts, you must contact your installation
engineer
2. If necessary, reset the electronic controller. Replace the sensor
if the error persists.
detect a differential of >
Error in temperature
o
10 C over a period of
sensor T , outlet of
2
(1)
at least 60 seconds.
heat exchanger
E04 (lock-out error)
The two dummy
1. Check leads from dummy 1 and dummy 2.
To replace the necessary parts, you must contact your installation
engineer
sensors in the tank
detect a differential of >
2. If necessary, reset the electronic controller. Replace the dummy
sensor if the error persists.
Error in dummy
o
(2)
10 C over a period of
sensor
.
at least 60 seconds.
E05 (lock out error)
The controller has been 1. Resolve the blocking error and press RESET to remove the lock To resolve the blocking error, see fault description for the error
in a blocking error for at
least 20 hours.
concerned.
out error.
Controller too long in a
blocking error
E07 (lock out error)
Temperature difference
across the heat
Defective pump
1. Check that the pump is working correctly
To replace the necessary parts, you must contact your installation
engineer
Blocked or bunged up 1. Replace blocked or distorted parts of the pipe system.
pipe system
For repairing and cleaning the pipe system, contact your installation
engineer.
exchanger too large
2. Clean the pipes to remove any lime accretions or baked-on dirt.
Wrong pump mode
1. Check the pump operating mode according to the table
If the error cannot be resolved or is persistent, contact your
installation engineer
Note:
(1) Temperature sensor T is a '2 in 1' sensor; T contains 2 NTCs for maximum thermostat and safety thermostat protection.
2
2
(2) The dummy flue gas sensor consists of dummy flue gas sensor 1 and dummy flue gas sensor 2.
Instruction manual GWV
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is
13.4 Warnings
Warning
Features
Cause
Comment
The display shows the text:
!!! WARNING !!!
WORKING SPEED 2
FAN
Fan is running at the 1. Check running speed 2 of the fan (12.5 "Displaying the
If the error cannot be resolved or is persistent, contact your
installation engineer.
To replace the necessary parts, you must contact your
installation engineer.
wrong speed during
full load.
appliance selection")
2. Check whether the flue gas discharge is compliant with the
table.
NOT CORRECT
3. Check that the flue gas outlet is not blocked; remove any
blockage.
(see note 1)
The display shows the text:
!!! WARNING !!!
TEMPERATURE DIFFERENCE
HEAT EXCHANGER
TOO LARGE
Defective pump
Check that the pump is working correctly
To replace the necessary parts, you must contact your
installation engineer.
Blocked or bunged 1. Replace blocked or distorted parts of the pipe system.
up pipe system
For repairing and cleaning the pipe system, contact your
installation engineer.
2. Clean the pipes to remove any lime accretions or baked-on
dirt.
(see note 1)
Wrong pump mode Check the pump mode (3.6.4 "System pump")
If the error cannot be resolved or is persistent, contact your
installation engineer.
The display shows the text:
!!! WARNING !!!
SHORT
The appliance is
oscillating between
full load and partial
load.
1. Change the margin between switching in full load and partial If the error cannot be resolved or is persistent, contact your
installation engineer.
load by changing the stage difference via "service program |
stage difference"
HEATING CYCLES
SAFETY
(see note 2)
Note:
(1) As a result of this warning, the appliance will switch to partial load and remain active in that mode until the warning is cleared with RESET and ENTER
(2) As a result of this warning, the controller will insert a delay of 180 seconds between switching off the stage in question and then starting it up again.
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13
Troubleshooting
gis
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14 Maintenance
frequency
A service should be carried out at least once a year, both on the water side and
on the gas side. Maintenance frequency depends, among other things, on the
water quality, the average burning time per day and the set water temperature.
14.1 Introduction
Note
Regular maintenance extends the service life of the appliance.
To determine the correct maintenance frequency, it is recommended to arrange
for the service and maintenance engineer to check the appliance on both the
water and gas side, three months after installation. Based on this check, the
best maintenance frequency can be determined.
To aid servicing, the electronic controller has a service interval with which the
service and maintenance engineer can determine the frequency of
maintenance, based on the number of burning hours.
14.2 Determining service
interval
The service interval can be set to: 500, 1000 or 1500 burning hours. The
standard setting is 500 burning hours.
Example
In the first three months, the appliance has burned for 300 hours. During
maintenance, it is evident that one service per year will be sufficient. Therefore,
after one year, some 1200 burning hours will have elapsed. The first value below
1200 hours that can be selected is 1000 burning hours.
In this case, the service and maintenance engineer sets the interval to 1000.
In the first three months, the appliance has burned for 300 hours. During
maintenance, it is evident (perhaps due to the water quality) that service will be
required at least once every 6 months.
Therefore, after six months, some 600 burning hours will have elapsed. The first
value below 600 hours that can be selected is 500 burning hours.
In this case, the service and maintenance engineer sets the interval to 500.
!!! WARNING !!!
MAX. BURNINGHOURS:
SERVICE REQUIRED
When the set number of burning hours has elapsed, the
SERVICE REQUIREDmessage will appear on the display. Soon after the
message appears, contact should be made with the service and maintenance
engineer.
Instruction manual GWV
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14
Maintenance frequency
is
88
Instruction manual GWV
s
15 Performing
maintenance
Caution
15.1 Introduction
Maintenance may only be performed by a qualified service and
maintenance engineer.
At each service, the appliance undergoes maintenance on both the water side
and the gas side. The maintenance must be carried out in the following order.
Note
To order spare parts, it is important to write down the appliance type and
model, and the full serial number of the appliance. These details can be found
on the rating plate. Only by ordering with this information can you be sure to
receive the correct spare parts.
To test whether all components are still working properly, complete the following
steps:
15.2 Preparation for
maintenance
1. Activate the MENUwith
.
2. Use and to position the cursor in front of OFF
.
3. Confirm OFFwith
.
MENU
»OFF
^ ON
È WEEK PROGRAM
4. Wait until the fan has stopped. The icon then goes out.
Caution
Failure to wait until the fan stops purging can cause damage to the
appliance.
5. Switch the appliance OFF (position 0) using the ON/OFF switch on the
control panel.
GENESIS
IMD-0511 R1
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15
Performing maintenance
s
6. Switch the electronic controller ON by setting the On/Off switch to position I.
INTERNAL CHECK
The display will now show INTERNAL CHECKfor about 10 seconds and
go to the main menu.
MENU
»OFF
^ ON
È WEEK PROGRAM
7. Activate the 'ON mode' by going through the following steps:
-
Press the blue arrow once ( ) to position the cursor in front of ONand
press
Confirm the START OPERATIONby pressing
.
-
.
temperature"). Note the original setting. If there is no demand, draw some
hot water off to create demand.
set
11. Carefully remove the sheeting from the front of the appliance.
12. Check the supply and burner pressures (3.11 "Checking the supply
pressure and burner pressure") and adjust these where necessary.
13. Check that all components of the flue gas system are properly attached.
14. Check the pressure differential across the orifice plate of the pressure switch
(see the table). If the pressure difference is too low, the flue gas outlet and
air supply should be checked for blockages.
Pressure switch differential
Appliance Observed pressure differential across the pressure switch
(Pa)
GWV 120
GWV 150
GWV 200
> 66
> 75
> 92
15. Test the operation of the overflow valve of the protected cold supply set-up.
The water should spurt out.
16. Test the overflow operation of the P-valve. The water should spurt out.
17. Check the drainage pipes from the discharge points of all valves and remove
any scale deposits that may be present.
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15.3 Water-side mainte-
nance
15.3.1 Introduction
The following steps must be carried out on the water side:
15.3.2 Checking the anodes
Timely replacement of the anodes extends the service life of the appliance. The
appliance's anodes must be replaced as soon as they are 60% used or more
(take this into consideration when determining the maintenance frequency).
1. Loosen the anodes using suitable tools.
2. Check the anodes, and if necessary, replace them.
15.3.3 Descaling and cleaning the storage tank
Scale and lime buildup prevent effective conduction of the heat to the water.
Periodic cleaning and descaling prevents buildup of these deposits. This
increases the service life of the appliance, and also improves the heating
process.
Take the rate of scale formation into account when deciding on maintenance
frequency. Scale formation depends on the local water composition, the water
consumption and the water temperature setting. A water temperature setting of
maximum 60°C is recommended for prevention of excessive scale buildup.
To guarantee a good, watertight seal around the cleaning opening, replace the
gasket, washers, bolts and, if necessary, the lid with new parts before
reassembly (see the figure). A special set is obtainable from the
supplier/manufacturer.
To simplify descaling and cleaning of the tank, the storage tank has a cleaning
opening.
1
IMD-0512 R0
1. Remove the cover plate (1) on the outer jacket (see the figure).
2. Undo the bolts.
3. Remove the cover and the gasket.
4. Inspect the storage tank and remove the loose limescale deposits and
contamination.
5. If the scale cannot be removed by hand, then the appliance will need to be
descaled using a descaling agent. Contact the supplier for advice on the
preferred descaling agent.
6. Close the cleaning opening. To avoid damage to the storage tank, tighten
the bolts that fasten the lid with a torque no greater than 50 Nm. Use suitable
tools for this.
Instruction manual GWV
91
15
Performing maintenance
s
15.4 Gas-side mainte-
nance
15.4.1 Introduction
The following steps must be carried out on the gas side:
15.4.2 Clean the burner(s)
1. Dismantle first the yellow flexible gas hose, the manifold and then the
burner(s).
2. Remove all contamination present on the burner(s).
3. Fit the burner(s)
15.4.3 Clean the injector(s)
1. Dismantle the injector(s)
2. Remove all contamination present in the injector(s).
3. Fit the injector(s), then the manifold and then the flexible gas hose.
15.4.4 Cleaning the aluminium strips
1. Dismantle the flue gas outlet
2. Use a vacuum cleaner to clean the aluminium strips.
To finalize the maintenance carry out the following steps:
15.5 Finalizing mainte-
nance
3. Erase the message SERVICE REQUIRED. Do this by pressing once on
then once on
.
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16 Warranty (certificate)
To register your warranty, you should complete and return the enclosed
warranty card after which a warranty certificate will be sent to you. This
certificate gives the owner of a appliance supplied by A.O. Smith Water
Products Company B.V. of Veldhoven, The Netherlands (hereinafter "A.O.
Smith") the right to the warranty set out below, defining the commitments of A.O.
Smith to the owner.
If within one year of the original installation date of an appliance supplied by
A.O. Smith following verification, and at the sole option of A.O. Smith, a section
or part proves to be defective or fails to function correctly due to manufacturing
and/or material defects, then A.O. Smith shall repair or replace this section or
part.
16.1 General warranty
16.2 Appliance warranty
If within 5 years of the original installation date of an appliance supplied by A.O.
Smith following verification and at the sole option of A.O. Smith, it transpires that
the heat exchanger leaks from the water side, A.O. Smith will provide a
complete new appliance of the same size and quality. The warranty period given
on the replacement appliance shall be equal to the remaining warranty period
of the original appliance that was supplied. Notwithstanding the stipulations
earlier in this article, in the event that unfiltered or softened water is used, or
allowed to stand in the appliance, the warranty shall be reduced to one year
from the original installation date.
The warranty set out in article 1 and 2 will apply solely under the following
conditions:
16.3 Conditions for Instal-
lation and use
a. The appliance is installed under strict adherence to the installation
instructions of A.O. Smith for the specific model, and the relevant local
authority installation and building codes, rules and regulations in force.
b. The appliance remains installed at the original site of installation.
c. The appliance is exclusively used with drinking water, which at all times
can freely circulate (a separately installed heat exchanger is mandatory
for heating salt water or corrosive water).
d. The storage tank is safeguarded against harmful scaling and lime
accretion by means of periodic maintenance.
e. The water temperatures in the appliance do not exceed the maximum
setting of the thermostats, which form a part of the appliance.
f. The water pressure and/or heat load do not exceed the maximum values
stated on the appliance's rating plate.
g. The appliance is installed in a non-corrosive atmosphere or
environment.
h. The appliance is connected to a protected cold supply arrangement,
which is: approved by the relevant authority; has sufficient capacity for
this purpose; supplying a pressure no greater than the working pressure
stated on the appliance; and where applicable by a likewise approved
temperature and pressure relief valve, fitted in accordance with the
installation instructions of A.O. Smith applying to the specific model of
the appliance, and further in compliance with the government and local
authority installation and building codes, rules and regulations.
i. The storage tank is at all times fitted with cathodic protection. If sacrificial
anodes are used for this, these must be replaced and renewed when,
and as soon as, they are 60% consumed or more. When electric anodes
are used, it is important to ensure that they continue to work properly.
Instruction manual GWV
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16
Warranty (certificate)
gis
The warranty set out in articles 1 and 2 will not apply in the event of:
16.4 Exclusions
a. damage to the appliance caused by an external factor;
b. misuse, neglect (including frost damage), modification, incorrect and/or
unauthorised use of the appliance and any attempt to repair leaks;
c. contaminants or other substances having been allowed to enter the
storage tank;
d. the conductivity of the water being less than 125µS/cm and/or the
hardness (alkaline-earth ions) of the water being less than 1.00
e. unfiltered, recirculated water flowing through or being stored in the
appliance;
f. any attempts at repair to a defective appliance other than by an
approved service engineer.
The obligations of A.O. Smith by virtue of the warranty provided do not extend
beyond delivery free of charge from the warehouse of the parts or components
or appliance to be replaced; transport, labour, installation and other costs
associated with the replacement will not be borne by A.O. Smith.
16.5 Scope of the
warranty
A claim on grounds of the specified warranty must be submitted to the dealer
from whom the appliance was purchased, or to another authorised dealer for the
products of A.O. Smith Water Products Company. Inspection of the appliance
as referred to in articles 1 and 2 shall take place in one of the laboratories of
A.O. Smith.
16.6 Claims
A.O. Smith grants no other warranty or guarantee over its appliances nor the
(parts or components of) appliances supplied for replacement, other than the
warranty expressly set out in this Certificate.
16.7 Obligations of A.O.
Smith
A.O. Smith is not liable for damage to persons or property caused by (parts or
components, or the glass-lined steel storage tank of) a (replacement) appliance
that it has supplied under the terms of this warranty, nor on any other grounds.
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17 Appendices
This appendix contains:
17.1 Introduction
•
•
Electrical diagram (17.2 "Electrical diagram")
Instruction manual GWV
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is
TERMINAL BLOCK CONNECTIONS:
Earth
N
L
Neutral
Phase input of controller
Phase input of system pump
Phase input of program-controlled pump
1
L
L
2
COMPONENTS:
A
B
C
D
E
F
Controller
Flame probe
Hot surface igniter
Gas control 1
Gas control 2
Display
G
H
J
Fan
External ON mode switch
n/a
K
L
Alarm signal
n/a
M
N
P
Q
R
S
T
Program-controlled pump
System pump
Double-pole isolator
0/1 switch of controller
Temperature sensor (T1 - heat exchanger inlet)
Dummy
Temperature sensor (T3 -Tank)
Temperature sensor (T2 - heat exchanger outlet)
Selection resistor
U
V
W
X
Air pressure switch
Flow-through switch
CONTROLLER CONNECTIONS:
J2 Connection for controller power
J19 Connection for system pump and alarm signal
J20 Connection for gas controls
J21 Program-controlled pump connection
J29 n/a
J33 Fan connection
J36 Connection of display to controller
JP2 Flame probe and hot surface igniter connection
JP3 Temperature sensor T1 connection
JP4 Dummy connection
JP5 Connection for temperature sensors T2 and T3
JP6 Selection resistor and air pressure switch connection
JP8 Extra ON mode switch connection
JP12 Connection for flow-through switch
F1
F3
Fuse
Fuse
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17
Appendices
is
98
Instruction manual GWV
17.3 Week program card
You can cut the week program card out and keep it near the appliance.
Period
DAY
TIME
Tset
Pump
ON OFF
Period
DAY
TIME
Tset
Pump
ON OFF
ON
ON
1.
2.
....°C
/
/
/
/
/
/
/
/
/
/
/
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
....°C
/
/
/
/
/
/
/
/
/
/
OFF
ON
OFF
ON
....°C
....°C
....°C
....°C
....°C
....°C
....°C
....°C
....°C
....°C
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
....°C
....°C
....°C
....°C
....°C
....°C
....°C
....°C
....°C
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
3.
OFF
ON
OFF
ON
4.
OFF
ON
OFF
ON
5.
OFF
ON
OFF
ON
6.
OFF
ON
OFF
ON
7.
OFF
ON
OFF
ON
8.
OFF
ON
OFF
ON
9.
OFF
ON
OFF
ON
10.
OFF
ON
OFF
11.
OFF
Example
Period
DAY
MO
TIME
14:30
16:15
Tset
Pump
ON OFF
ON
1.
70°C
/
OFF
MO
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Instruction manual GWV
100
gis
Index
A
L
appliance
M
maintenance
C
connect
mode
N
O
P
D
E
F
S
G
H
I
symbol
T
icons
U
W
Instruction manual GWV
101
Index
Instruction manual GWV
0307 971
4.0 UK
|