A.O. Smith Dura-Max DW-1810 User manual

Page 1 of 4
Revised November 2009
AOSDG25300
Domestic Hot Water Boilers
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
of individual tubes
GASKETLESS WET SECTION
positioned away from and outside the combustion chamber
DRAWER-MOUNTED, STAINLESS STEEL DURA-MAX® BURNERS
COMPACT, LOW-PROFILE DESIGN
INTERMITTENT ELECTRONIC IGNITION
FACTORY-MOUNTED BRONZE-FITTED PUMP
reduces standby heat loss
MAXIMUM HYDROSTATIC WORKING PRESSURE: 160 PSI
MEETS CURRENT EDITION ASHRAE/IESNA 90.1
FIVE-YEAR HEAT EXCHANGER LIMITED WARRANTY
MODELS
DW-720
through
DW-1810
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Domestic Hot Water Boilers
Revised November 2009 Page 2 of 4
www.hotwater.com AOSDG25300
* Natural gas only
MODEL
NUMBER
BTU
INPUT
PER
HOUR*
GPH
OR
LPH
RECOVERY -GALLONS OR
LITRES PER HOUR AT
DEGREE RISE
22°C 78°C
720,000
707
1911
840,000
3122 2230
943
8920
1,080,000
1073
2902
1,210,000
3007 1203
11,381
1342
1,480,000
3880
3903
14,774 4221
1,810,000
4388
INPUT AND RECOVERY
MINIMUM CLEARANCES TO COMBUSTIBLES -
ALL MODELS
CM
12
18
REAR
VENT
Alcove
OTHER DURA-MAX®FEATURES
DURA-MAX®OPTIONS
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Domestic Hot Water Boilers
Revised November 2009 Page 3 of 4
www.hotwater.com AOSDG25300
INPUT/OUTPUT, FLOW RATE (GALLONS AND LITRES PER MINUTE) AND PRESSURE DROP
GPM LPM GPM LPM
720,000 223 1.1 39 149 1.7 29 111 1.0 0.3
840,000 4.8 173 2.1 34 130
79 297 2.1 198 3.3 1.0 39 149 1.9
1,080,000 89 339 1.4 2.1 1.4 0.4
1,210,000 992,200 100 379 2.7 0.8 190
1,107,000 112 423 2.1 282 3.2 1.0 212 1.8
1,490,000 1,184,000 120 7.9 2.4 80 302 3.9 1.2 2.1
1,288,000 130 492 2.9 87 328 3.0 0.9
1,810,000 1,448,000 12.0 3.7 98 1.9 73 277 3.9 1.2
Pressure drop shown is loss through boiler only, and does not include any additional piping.
DIMENSIONS AND SHIPPING WEIGHTS
MODEL
NUMBER
INCHES OR
CM
DIMENSIONS
SHIPPING
WEIGHT
ABCDEFGHLMNP
112 780 Lbs.
CM 118.1 139.1 3.2 19.7 39.4 43.8 10.8 39.4
114
CM 139.1 3.2 19.7 39.4 43.8 10.8 41.9 79.1 431 Kg
114
CM 139.1 3.2 19.7 39.4 43.8 10.8 41.9 431 Kg
4 1000 Lbs.
CM 134.3 83.2 147.3 3.2 19.1 47 47.1 10.2 3.2 43.8
4
CM 83.2 147.3 3.8 19.1 47 47.1 10.2 3.2 43.8 488 Kg
4 18 11 00 Lbs.
CM 83.2 147.3 3.8 19.1 47 47.1 10.2 3.2 499 Kg
34 18 31
CM 3.8 19.1 47 11.4 3.2 34.9 78.7
34 2 18 31
CM 19.1 47 11.4 3.2 34.9 78.7
34 2 20 31
CM 19.1 47 11.4 3.2 34.9 78.7
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Domestic Hot Water 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 current edition ASHRAE/IESNA 90.1. 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
www.hotwater.com AOSDG25300
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