A.O. Smith DW-1810 User Manual
Commercial Gas Boilers
MODELS
DW -720
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, drawermounted 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 efcient, reliable design
• Protects against corrosion and condensation deterioration
• Easy slide-out burner tray simplies cleaning and maintenance
through
DW- 1810
COMPACT, LOW-PROFILE DESIGN
• Built-in draft diverter provides extra clearance in tight, retrot installations
• Clean, compact jacket design for easy access and assembly
• Cool to touch and approved for combustible oors
INTERMITTENT ELECTRONIC IGNITION
• Eliminates standing pilot, saves energy
• Includes power ON/OFF switch
FACTORY-MOUNTED BRONZE-FITTED PUMP
• Ensures proper ow rates and efcient 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
Revised November 2009
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AOSDG25300
OTHER DURA-MAX® FEATURES
l
MANUAL RESET, HIGH LIMIT
l
SAFETY FLOW
l
SWITCH
ASME-RATED PRESSURE RELIEF VALVE
l
REDUNDANT GAS VALVE
DURA-MAX® OPTIONS
q CSD-1
q NEW YORK CODE
q CALIFORNIA CODE
q PANEL MOUNTED INLET/OUTLET DIAL
q THERMOMETERS AND PRESSURE GAUGE
q MOTORIZED MODULATING FIRE
q DUAL STAGE FIRING
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
INPUT AND RECOVERY
Commercial Gas Boilers
l
125#
MINIMUM CLEARANCES TO COMBUSTIBLES ALL MODELS
Inches CM
TOP 12
WATERSIDE
BLANK SIDE
REAR
VENT
FRONT
18
6
6
6
30.5
45.7
15.5
15.5
15.5
Alcove
MODEL
NUMBER
DW-720
DW-840
DW-960
DW-1080
DW-1210
DW-1350
DW-1480
DW-1610
DW-1810
BTU
INPUT
PER
HOUR*
720,000
840,000
960,000
1,080,000
1,210,000
1,350,000
1,480,000
1,610,000
1,810,000
GPH
OR
LPH
GPH
LPH
GPH
LPH
GPH
LPH
GPH
LPH
GPH
LPH
GPH
LPH
GPH
LPH
GPH
LPH
GPH
LPH
RECOVERY -GALLONS OR
LITRES PER HOUR AT
DEGREE RISE
40°F
22°C
1767
6690 2676
2062
7805 3122
2356
8920 3568 2548
2684
10,158
3007
11,381
3355
12,698
3588
13,581
3903
14,774
4388
16,609
100°F
56°C 78°C
707 505
825 589
943 673
1073
4063
1203
4552
1342
5079 3628
1435 1025
5432
1561
5910
1755
6644 4746
140°F
1911
2230
767
2902
859
3252
958
3880
1115
4221
1254
* 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
www.hotwater.com
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AOSDG25300
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