A.O. Smith GW-1000 Specification Sheet
Revised March 2003
A 012.15
HOT WATER SUPPLY BOILERS
MODELS GW/GWO-1000 THRU GW/GWO-2500
LIMITED WARRANTY OUTLINE
If the heat exchanger should fail within 5 years, under
the terms of the warranty, A.O. Smith will furnish a
replacement part; installation, labor, handling and local
delivery extra. THIS OUTLINE IS NOT A WARRANTY.
For complete information, consult the written warranty
or A.O. Smith Water Products Company.
Warranty does not apply to product installed outside of the
United States of America or its territorial possessions and
Canada.
OPTIONS
Code Options: CSD-1, California Code, IRI,
New York, and Illinois School 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
• Cupro-Nickel Tubes
• Hard Water Pump (inline)
• Sequencing Control Panel (2-8 Boilers)
FEATURES
84% THERMAL EFFICIENCY –The absolute highest thermal
efficiency possible by a non-condensing boiler is achieved by
the new 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. Meets or
exceeds California SCAQMD air quality standards.
EXCLUSIVE DIA-SCAN II W/STAGED FIRING –The Dia -Scan II 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 Dia-Scan II provides true self-diagnostic
capabilities, eliminates guesswork, and reveals exactly where
the problem is. Troubleshooting has never been easier.
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
HEAVY-DUTY CAST HEADERS –Choose from heavy non-ferrous
all bronze headers or heavy cast iron Cora-Shield Coated
headers. Genesis boiler headers are split bolted designs that
allow complete and easy inspection of all internal header water
surfaces and easy inspection of the copper tubes.
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 and integrally rear header mounted, pre-wired bronze fitted
pump is standard. Dia-Scan II controlled 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
the space of a 2.5 million btu boiler.
OTHER FEATURES
ASME Pressure Relief Valve 125# • Mounted Flow Switch
• Remote Tanks Temperature Sensor • Alternate Thermostat
Terminals (24V) • Manual Reset High Limit • Blocked Flue
Switch • Fan Proving Switch • Adjustable Pump Delay.
ASME
CRN