A. O.SMITH’S
INNOVATION ON DEMAND
A. O. Smith’s complete line of tankless gas water heaters
A Variety of Sleek, Compact Indoor Models To Choose From
ATI-305-N (Natural Gas), ATI-305-P (Propane)
ATI-505-N (Natural Gas), ATI-505-P (Propane)
ATI-705-N (Natural Gas), ATI-705-P (Propane)
ATI-705A-N (Natural Gas), ATI-705A-P (Propane) Commercial
305 and 505 Models
705 Model
Model Dimensions
305 and 505
inches (mm)
705
inches (mm)
Dimension
Description
A
B
C
D
E
F
G
H
I
Width
14 (355.6)
9.6 (244.5)
22.9 (582)
25.5 (648.2)
3.6 (91)
18.5 (470)
9.3 (230.5)
23.6 (600)
25.2 (640)
4.5 (115)
2.4 (61)
Depth
Height - Unit
Height - with brackets
Hot Water Outlet - from wall*
Hot Water Outlet - from center
Cold Water Inlet - from wall*
Cold Water Inlet - from center
Gas Connection - from wall*
4.3 (110)
2.8 (70)
3.9 (99)
1.1 (27)
2.0 (52)
4.3 (109)
2.4 (61.2)
J
Gas Connection - from center
From base to gas connection
3.5 (89)
1.6 (40)
4.3 (110)
1.6 (40)
K
From base to cold connection
From base to hot connection
2.0 (50)
1.6 (41)
2.0 (50)
1.6 (41)
All Models Available
In Both Natural Gas
And Propane Designs
* This is the minimum dimension from the wall. The wall bracket is adjustable to allow an additional
1.57 inches (40mm).
A. O. Smith On-Demand Gas Water Heaters
Residential and Commercial Product Features:
Outlet Flow Data
Innovative Technology
Excellent Performance
■
■
A variety of indoor installation options
12-year limited warranty on heat
exchanger, 5-year warranty on all parts
■
Continuous hot water on demand (up to 9.8 GPM)
■
Models available that meet requirements
of ASME Boiler and Pressure Vessel Code
■
Whole house water heating solution
■
Direct electronic ignition – no pilot light
■
On-board diagnostics and safety monitoring
Energy Efficiency
■
Interior sealed combustion
(does not use interior combustion air)
■
Up to 84% thermal efficiency, providing
significant energy cost savings
Model Specifications
Model
305
505
705
Minimum Gas Consumption Btu/h
Maximum Gas Consumption Btu/h
15,000
19,000
237,000
199,000 Natural Gas
190,000 Propane Gas
Hot water capacity (Min - Max)*
Hot water capacity (45°F rise)
0.6 - 5.3 GPM
0.6 - 8.5 GPM
0.6 - 9.8 GPM
(2.3 - 20.1 L/min)
(2.3 - 32.0 L/min)
(2.3 - 37 L/min)
7.4 GPM (28.0 L/min)
Natural Gas
7.1 GPM (26.9 L/min)
Propane Gas
5.3 GPM
(20.1 L/min)
8.8 GPM
(33.5 L/min)
Default Temperature Setting (no controller)
Remote Controller Default Temperature Setting
Maximum Temp Setting (Commercial**)
Maximum Temp Setting (Residential)
Minimum Temperature Setting
Weight
120º F (49º C)
104º F (40º C)
160º F (71º C)
185º F (85º C)
140º F (60º C)
98º F (37º C)
50 lb (23 kg)
55 lb (25 kg)
Efficiency Rating
84%
Noise level
49 dB
Electrical Consumption
By-Pass Control
Normal
79 W
2.8 W
100 W
99 W
2 W
Standby
Anti-frost Protection
116 W
Fixed
Electronic
Minimum Gas Supply Pressure Natural Gas
Propane
5.0 inch W.C.
8.0 inch W.C.
10.5 inch W.C.
13.5 inch W.C.
Maximum Gas Supply Pressure Natural Gas
Propane
Type of Appliance
Direct Vent, Temperature controlled continuous flow gas hot water system.
With or without remote controls, mounted in kitchen, bathroom, etc.
Natural Gas or Propane - Ensure unit matches gas type it's being installed on.
Gas Supply: 3/4˝ MNPT, Cold Water Inlet: 3/4˝ MNPT, Hot Water Outlet: 3/4˝
Direct Electronic Ignition
Operation
Approved Gas Type
Connections
Ignition System
Electric Connections
Water Temperature Control
Water Supply Pressure
Maximum Water Supply Pressure
Remote Control Cable
Appliance: AC 120 Volts, 60Hz. Remote Control: DC 12 Volts (Digital)
Simulation Feedforward and Feedback.
Minimum Water Pressure: 20 PSI (Recommended 30-80 PSI for maximum
150 PSI
Non-Polarized Two Core Cable (Minimum 22 AWG)
* Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature.
** for commercial and hydronic applications requiring higher temperatures
Specifications are subject to change without prior notice.
The maximum inlet gas pressure must not exceed the value specified by the manufacturer. The minimum value listed is for the purpose of input adjustment.
500 Tennessee Waltz Parkway
Ashland City, TN 37015
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AMGSS00207 ©2007 A. O. Smith Corporation
A. O. Smith reserves the right to make product changes or improvements at any time without notice.
Printed in U.S.A
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