A. O. Smith GWO-1000 User Manual
®
;
Domestic Hot Water Boilers
FEATURES
84% THERMAL EFFICIENCY –The absolute highest thermal efficiency possible by a
non-condensing boiler is achieved by the Genesis Boiler.
Low NOx –Precise amounts of gas and air are premixed through special Pre-Jet Orifices
and forced through stainless steel burners that provide complete and clean combustion.
Complies with SCAQMD Rule 1146.2 and other Air Quality Management Districts with
similar requirements.
EXCLUSIVE EMC-5000 CONTROL W/STAGED FIRING-The EMC-5000 is a complete
microprocessor based boiler control. Every electrical boiler function; from starting the pump,
to stage firing the main burner, to cycling the pump off at the end of a heating cycle; is
controlled and monitored by the onboard computer. A comprehensive display panel includes
LEDs that indicate current operating and fault status. A digital LED displays temperature
set points, outlet temperature, current inlet/outlet differential (¨T), tank temperature, and
additional numerical fault codes. Precise temperature management is plus or minus 1°. In
addition, the EMC-5000 provides true self-diagnostic capabilities, eliminates guesswork, and
revea
ls exactly where the problem is. Troubleshooting has never been easier.
iCOMM™ compatible and can be monitored from remote locations.
Call 1.888.WATER02 for more information.
GW/GWO-1000
through
GW/GWO-2500
STAGED FIRING –All second family Genesis boilers are staged fired.
The boiler automatically adjusts its firing rate and btu output to
maintain precise system temperature control. Each stage is user
programmable; allows the boiler to be tailored to the installation
and adjusted for optimum boiler performance and overall system
efficiency. Models GW-1000 thru GW-1500 have three stages; Models
GW-1850 thru GW-2500 have four stages.
HEAT EXCHANGER WITH HEAVY-DUTY CAST HEADERS–Cast
iron glass lined headers are standard, bronze headers are optional.
HIGH EFFICIENCY HIGH HEAT TRANSFER – A. O. Smith’s
distinctive double row integral finned copper heat exchanger provides
maximum heat transfer and utilizes a self-baffling staggered tube design,
that assures 84% thermal efficiency.
INTEGRAL REAR HEADER BOILER MOUNTED PUMP –Factory sized, pre-wired bronze
fitted pump is standard. Factory standard pump time delay allows the removal of useable
residual heat from the combustion chamber during the stand-by cycle. Practically eliminates
stand-by heat loss.
FACTORY TESTED –Each Genesis boiler is water and fire tested before leaving the factory.
UNMATCHED VENTING FLEXIBILITY –Multiple venting options; choose from several
conventional or direct venting options. Multiple openings options; choose from exhaust outlet leaving the top of boiler or exhaust outlet-leaving the rear of boiler.
STACKABLE SPACE SAVING DESIGN –Up to 5 million btu’s in space of a 2.5 million btu
boiler.
OTHER FEATURES -Mounted Flow Switch Remote Tanks Temperature Sensor ASME
Rated T&P Relief Valve 125#
Limit Blocked Flue Switch Fan Proving Switch Adjustable Pump Delay.
Alternate Thermostat Terminals (24V) Manual Reset High
OPTIONS -Code Options: CSD-1, California Code Alarm Bell Outdoor Models Stack Rack
Low Water Cut Off Extended Power Venting Kits Dry Contacts For Any Boiler Failure
Direct and Sidewall Vent Terminal Kits
EMS converter (Allows Energy Management Controls systems to manage the stage firing.)
Cupro-Nickel Tubes Hard Water Pump (inline)
FIVE-YEAR HEAT EXCHANGER LIMITED WARRANTY
FACTORY START-UP INCLUDED-Required for activating warranty and assuring maximum
operating performance. Contact your local representative or Authorized Start-Up Agent to
arrange a FREE certified start-up.
For complete information, consult written warranty or contact A. O. Smith
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®
Domestic Hot Water Boilers
All Dimensions in Inches
Model
GW-1000 2 1/2 2 10 8 47 40 1/2 14 12 1/2 36 1/4 31 3/4 20 3/4 64
GW-1300 2 1/2 2 12 10 57 1/2 40 1/2 24 3/4 12 1/2 36 1/4 31 3/4 18 74 1/2
GW-1500 2 1/2 2 12 10 64 1/2 40 1/2 30 12 1/2 36 1/4 31 3/4 19 3/4 81 1/2
GW-1850 2 1/2 2 1/2 14 10 78 3/4 43 1/4 27 3/4 11 1/2 35 1/4 32 1/2 34 1/4 95 3/4
GW-2100 2 1/2 2 1/2 14 12 85 1/2 43 1/4 31 11 1/2 35 1/4 32 1/2 35 3/4 102 1/2
GW-2500 2 1/2 2 1/2 16 12 99 1/2 43 1/4 38 10 1/2 35 1/4 32 1/2 42 3/4 116 1/2
Maximum gas supply pressure is 13.8” W.C. for both Natural and Propane Gas.
The minimum supply gas pressure is 7” W.C. for Natural Gas.
The minimum supply gas pressure for Propane is 11.0” W.C.
Requires: 120V, 60 Hz, 30 Amps. Dedicated breaker.
Model
GW-1000 990,000 GPH 2520 2016 1680 1440 1260 1120 1008 918 840 775
GW-1300 1,300,000 GPH 3309 2847 2208 1891 1655 1471 1324 1203 1103 1018
GW-1500 1,500,000 GPH 3818 3055 2545 2182 1909 1697 1527 1388 1273 1175
GW-1850 1,850,000 GPH 4709 3767 3139 2691 2355 2093 1884 1712 1570 1449
GW-2100 2,100,000 GPH 5345 4276 3564 3055 2673 2376
GW-2500 2,490,000 GPH 6338 5071 4225 3622 3169 2817 2535 2305 2113 1950
Model
GW-1000 990,000 831,600 83 5.1 55 2.7 42 1.5 154 12.2 11 42 1.5 40
GW-1300 1,300,000 1,092,000 109 72 73 4.2 55 3.2 154 14.5 14 55 3.2 40
GW-1500 1,500,000 1,260,000 126 10.1 84 8.3 64 4.3 154 16.3 17 64 4.3 40
50 1,850,000 1,554,000 154 19 104 10.1 78 6.4 154 16.5 20 78 6.4 40
GW-18
GW-2100 2,100,000 1,764,000 N/A N/A 116 14.5 89 8.3 154 21.3 23 89 8.3 40
GW-2500 2,490,000 2,091,600 N/A N/A 139 16.5 105 11.6 154 23.2 26 106 11.6 40
Note: Flow rates and pressure drops shown above are through the boiler only and include no field piping. The field piping must also be considered when sizing system pumps.
Note: The standard factory supplied internal rear header mounted pump is sized for the boiler and up to additional 50 equivalent feet of field piping.
Water
Connections
Input Rating BTU/Hr.
Natural & Propane (LP) Gas
Input Rating BTU/Hr.
Natural & Propane (LP) Gas
Connections
BTU lnput/Output
Gas
Natural & Propane (LP) Gas
Vent InletAir
HOT WATER SUPPLY BOILER RECOVERY CAPACITIES
Temperature Rise-Degrees F. Gallons Per Hour
Output Rating BTU/Hr.
A Width
WO/Pump
40 50 60 70 60 90 100 110 120 130
20 Deg. F Rise 30 Deg. F Rise 40 Deg. F Rise Maximum Flow Rate Minimum Flow Rate
GPM
B Height C D E F G
2138 1944 1782 1645
Boiler Rate of Flow and Pressure Drop
PD-Ft.
Head
GPM
PD-Ft.
Head
GPM
PD-Ft.
Head
GPM
PD-Ft.
Head
Deg.F
Rise
GPM
PD-Ft.
Head
Width
W/Pump
Deg.F
Rise
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.
April 2011R
www.hotwater.com
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