AO Smith Boiler DW 1810 User Manual

Commercial Gas Boilers  
MODELS  
DW-720  
through  
DW-1810  
UP TO 82% EFFICIENT HOT WATER SUPPLY BOILERS  
The Dura-Max® series offers excellent performance and low-profile design flexibility for both  
new construction and retrofit applications. A double-row, integral-finned copper tube heat  
exchanger provides exceptional heat transfer efficiency. Each unit features a small footprint  
with a built-in draft diverter for extra clearance to simplify installation. Reliable, quiet, drawer-  
mounted stainless steel burners resist corrosion, improve access for easy maintenance.  
FEATURES  
100% ALL NON-FERROUS HEAT EXCHANGER WATERWAYS  
• All waterways 100% copper, brass or bronze  
• Won’t rust, resists thermal shock  
• Heavy-duty bronze castings and copper heat exchange tubes  
• Bronze removable return bends for easy access and inspection  
of individual tubes  
GASKETLESS WET SECTION  
• Unique “O”-ring design compresses to form water-tight seal  
positioned away from and outside the combustion chamber  
• Isolated location offers optimum protection and years of service  
DRAWER-MOUNTED, STAINLESS STEEL DURA-MAX® BURNERS  
• Quiet operation and efficient, reliable design  
• Protects against corrosion and condensation deterioration  
• Easy slide-out burner tray simplifies cleaning and maintenance  
COMPACT, LOW-PROFILE DESIGN  
• Built-in draft diverter provides extra clearance in tight, retrofit installations  
• Clean, compact jacket design for easy access and assembly  
• Cool to touch and approved for combustible floors  
INTERMITTENT ELECTRONIC IGNITION  
• Eliminates standing pilot, saves energy  
• Includes power ON/OFF switch  
FACTORY-MOUNTED BRONZE-FITTED PUMP  
• Ensures proper flow rates and efficient heat transfer  
• Thermal Balancer Pump Delay Switch cycles pump,  
reduces standby heat loss  
MAXIMUM HYDROSTATIC WORKING PRESSURE: 160 PSI  
MEETS ASHRAE/IESNA 90.1-2004  
FIVE-YEAR HEAT EXCHANGER LIMITED WARRANTY  
• For complete information, consult written warranty or contact A. O. Smith  
Page 1 of 4  
Revised November 2009  
AOSDG25300  
Commercial Gas Boilers  
OTHER DURA-MAX® FEATURES  
l
l
MANUAL RESET, HIGH LIMIT ASME-RATED PRESSURE RELIEF VALVE 125#  
l
l
l
MINIMUM CLEARANCES TO COMBUSTIBLES -  
ALL MODELS  
SAFETY FLOW SWITCH REDUNDANT GAS VALVE  
DURA-MAX® OPTIONS  
Inches  
12  
CM  
30.5  
45.7  
q CSD-1  
q NEW YORK CODE  
TOP  
q CALIFORNIA CODE  
WATERSIDE  
18  
q PANEL MOUNTED INLET/OUTLET DIAL  
q THERMOMETERS AND PRESSURE GAUGE  
q MOTORIZED MODULATING FIRE  
q DUAL STAGE FIRING  
BLANK SIDE  
REAR  
6
6
6
15.5  
15.5  
15.5  
q RIGHT HAND GAS AND/OR WATER CONNECTIONS  
q CUPRO-NICKEL HEAT EXCHANGER  
q SIDEWALL VENT KITSALL-BRONZE PUMP  
q HIGH VELOCITY HARD WATER PUMP  
q LOW WATER CUTOFF  
VENT  
FRONT  
Alcove  
INPUT AND RECOVERY  
RECOVERY -GALLONS OR  
LITRES PER HOUR AT  
DEGREE RISE  
BTU  
INPUT  
PER  
GPH  
OR  
LPH  
MODEL  
NUMBER  
40°F  
100°F  
56°C  
707  
140°F  
HOUR*  
22°C  
78°C  
GPH  
1767  
505  
DW-720  
720,000  
LPH  
GPH  
LPH  
GPH  
LPH  
GPH  
LPH  
GPH  
LPH  
GPH  
LPH  
GPH  
LPH  
GPH  
LPH  
GPH  
6690  
2062  
2676  
825  
3122  
943  
3568  
1073  
4063  
1203  
4552  
1342  
5079  
1435  
5432  
1561  
5910  
1755  
1911  
589  
2230  
673  
2548  
767  
2902  
859  
3252  
958  
3628  
1025  
3880  
1115  
4221  
1254  
DW-840  
DW-960  
DW-1080  
840,000  
960,000  
7805  
2356  
8920  
2684  
1,080,000  
10,158  
3007  
DW-1210  
DW-1350  
DW-1480  
DW-1610  
1,210,000  
1,350,000  
1,480,000  
1,610,000  
11,381  
3355  
12,698  
3588  
13,581  
3903  
14,774  
4388  
DW-1810  
1,810,000  
LPH  
16,609  
6644  
4746  
* Natural gas only  
Gas supply pressure: 13:8” w.c. maximum, 5.5” w.c. minimum  
Electrical requirements: 120 VAC, 15 Amps  
Revised November 2009  
Page 2 of 4  
AOSDG25300  
Commercial Gas Boilers  
INPUT/OUTPUT, FLOW RATE (GALLONS AND LITRES PER MINUTE) AND PRESSURE DROP  
20°F/11°C DELTA T  
MAXIMUM FLOW PRESSURE DROP  
30°F/17°C DELTA T  
MAXIMUM FLOW PRESSURE DROP  
40°F/22°C DELTA T  
MODEL  
NUMBER  
BTU/HR.  
INPUT  
BTU/HR.  
OUTPUT  
MAXIMUM FLOW PRESSURE DROP  
GPM  
59  
LPM  
223  
260  
297  
339  
379  
423  
453  
FEET  
3.5  
4.8  
6.8  
4.5  
5.3  
6.8  
7.9  
METERS  
1.1  
GPM  
39  
LPM  
149  
173  
198  
226  
253  
282  
302  
FEET  
1.7  
2.1  
3.3  
2.1  
2.7  
3.2  
3.9  
METERS  
0.5  
DW-720  
DW-840  
720,000  
840,000  
583,200  
680,400  
777,600  
885,600  
992,200  
1,107,000  
1,184,000  
29  
34  
39  
45  
50  
56  
60  
111  
130  
149  
169  
190  
212  
226  
1.0  
1.5  
1.9  
1.4  
1.6  
1.8  
2.1  
0.3  
0.5  
0.6  
0.4  
0.5  
0.5  
0.6  
69  
1.5  
46  
0.6  
DW-960  
960,000  
79  
2.1  
52  
1.0  
DW-1080  
DW-1210  
DW-1350  
DW-1490  
1,080,000  
1,210,000  
1,350,000  
1,490,000  
89  
1.4  
60  
0.6  
100  
112  
120  
1.6  
67  
0.8  
2.1  
75  
1.0  
2.4  
80  
1.2  
DW-1610  
DW-1810  
1,610,000  
1,288,000  
1,448,000  
130  
492  
9.5  
2.9  
3.7  
87  
98  
328  
5.0  
6.2  
1.5  
65  
246  
3.0  
3.9  
0.9  
1.2  
1,810,000  
146  
554  
12.0  
369  
1.9  
73  
277  
Pressure drop shown is loss through boiler only, and does not include any additional piping.  
DIMENSIONS AND SHIPPING WEIGHTS  
DIMENSIONS  
MODEL  
NUMBER  
INCHES OR  
CM  
SHIPPING  
WEIGHT  
A
B
C
D
E
F
G
H
L
M
N
P
Inches  
CM  
46-1/2  
29-5/8 54-3/4  
75.2 139.1  
29-5/8 54-3/4  
75.2 139.1  
29-5/8 54-3/4  
1-1/4  
3.2  
7-3/4  
15-1/2 17-1/4  
39.4 43.8  
15-1/2 17-1/4  
39.4 43.8  
15-1/2 17-1/4  
39.4 43.8  
18-1/2 18-9/16  
47 47.1  
18-1/2 18-9/16  
47 47.1  
18-1/2 18-9/16  
47 47.1  
18-1/2 19-1/8  
47 48.6  
18-1/2 19-1/8  
47 48.6  
18-1/2 19-1/8  
47 48.6  
4-1/4  
10.8  
4-1/4  
10.8  
4-1/4  
10.8  
4
1
12  
30.5  
14  
15-1/2 32-1/8  
39.4 81.6  
16-1/2 31-1/8  
41.9 79.1  
16-1/2 32-1/8  
41.9 81.6  
17-1/4 30-15/16  
43.8 78.6  
17-1/4 30-15/16  
43.8 78.6  
780 Lbs.  
354 Kg  
DW-720  
DW-840  
DW-960  
DW-1080  
118.1  
19.7  
2.5  
1
Inches  
CM  
52-1/5  
132.6  
57-3/4  
146.7  
52-7/8  
134.3  
1-1/4  
3.2  
7-3/4  
19.7  
7-3/4  
19.7  
7-1/2  
19.1  
950 Lbs.  
431 Kg  
2.5  
1
35.6  
14  
Inches  
CM  
1-1/4  
3.2  
950 Lbs.  
431 Kg  
75.2  
32-3/4  
83.2  
139.1  
58  
2.5  
1-1/4  
3.2  
1-1/4  
3.2  
1-1/4  
3.2  
1-1/4  
35.6  
16  
Inches  
CM  
1-1/4  
3.2  
1000 Lbs.  
454 Kg  
147.3  
58  
10.2  
4
40.6  
16  
Inches  
CM  
58-1/2  
148.6  
64-1/2  
163.8  
69-1/2  
32-3/4  
83.2  
1-1/2  
3.8  
7-1/2  
19.1  
1075 Lbs.  
488 Kg  
DW-1210  
DW-1350  
DW-1480  
DW-1610  
DW-1810  
147.3  
58  
10.2  
4
40.6  
18  
Inches  
CM  
32-3/4  
83.2  
1-1/2  
3.8  
7-1/2  
19.1  
17 1/4 30-15/16 11 00 Lbs.  
147.3  
60-1/2  
10.2  
4-1/2  
45.7  
18  
45.7  
78.6  
499 Kg  
Inches  
34  
1-1/2  
7-1/2  
13-3/4  
31  
11 25 Lbs.  
CM  
Inches  
CM  
176.5  
75  
86.4  
34  
153.7  
60-1/2  
153.7  
60-1/2  
3.8  
2
19.1  
7-1/2  
19.1  
11.4  
4-1/2  
11.4  
3.2  
1-1/4  
3.2  
45.7  
18  
34.9  
13-3/4  
34.9  
78.7  
31  
510 Kg  
11 50 Lbs.  
522 Kg  
190.5  
82-1/2  
86.4  
34  
5.1  
2
45.7  
20  
78.7  
31  
Inches  
7-1/2  
4-1/2  
1-1/4  
13-3/4  
1250 Lbs.  
CM  
209.6  
86.4  
153.7  
5.1  
19.1  
11.4  
3.2  
50.8  
34.9  
78.7  
567 Kg  
Water connections on DW-720 through DW-960: 2”  
Water connections on DW-1080 through DW-1810: 2-1/2”  
Revised November 2009  
Page 3 of 4  
AOSDG25300  
Commercial Gas Boilers  
SUGGESTED SPECIFICATION  
The hot water supply boiler(s) shall be A. O. Smith Dura-Max® model DW ______ with an input rating of ______ BTU/hr and a recovery rating of ________________ BTU/hr at  
100°F temperature rise. The boiler(s) shall be design-tested and certified to the ANSI Z21.13 standard, approved by CSA International and shall carry the ASME “H” Symbol. The wet  
section shall be design-registered in accordance with the requirements of the ASME Code and shall carry an appropriate National Board Number or Canadian Registration Number.  
All waterways shall be copper, brass or bronze. The heat exchanger shall be a two (2)-pass design incorporating integral-finned copper tubes. The double-row heat exchanger  
shall have staggered tubes. Cast bronze return bends shall be readily removable to permit visual inspection or cleaning without removing the entire wet section assembly. Silicone  
“O”-ring gaskets shall form a water-tight seal by compression and shall be isolated from the flue gases by 3/4” board-type ceramic fiber insulation. The heat exchanger assembly  
shall be hydrostatically tested to a pressure of 240 psi (1655 kPa) and shall have a maximum working pressure of 160 psi (1100 kPa).The combustion chamber shall be constructed  
of board-type ceramic fiber insulation rated to 2300°F (1260°C) which interlocks to form a gas-tight seal and shall be supported in a heavy-gauge corrugated steel frame. The  
external cabinet shall incorporate a built-in draft hood and shall be of baked enamel steel construction. It shall be suitable for installation on combustible flooring. The burners  
shall be a stainless steel stamped design and shall be mounted in a removable drawer assembly.The burner controls shall be 24 VAC and shall include slow-opening main gas valve  
for soft ignition, redundant safety shutoff gas valve, main and pilot pressure regulators, recycling intermittent pilot system with one-second shutdown in the event of pilot flame  
failure, automatic recycling high limit, manual reset ECO limit, main and pilot manual cocks and manual firing valve, and an ASME-rated pressure relief valve. The boiler shall be  
approved by Factory Mutual (FM).The boiler shall comply with ASHRAE/IESNA 90.1-2004 standards. Optional: Factory-installed, dial-type temperature and pressure gauges shall  
be mounted on the front of the cabinet.  
For Technical Information and Automated Fax Service, call 800-527-1953. A.O. Smith Corporation reserves the right to make product changes or improvements without prior notice.  
Revised November 2009  
Page 4 of 4  
AOSDG25300  

AO Smith Water Heater 100 Power Vent DV Series 120 User Guide
AO Smith Water Heater COF 700A User Manual
AO Smith Water Heater DEN 52 User Manual
AO Smith Water Heater EWS 25 User Manual
AO Smith Water Heater Residential Water Heater User Guide