A.O. Smith GWT-2500 User Manual

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AOSDG61020
Revised August 2008 
PG 1 OF 4
Commercial Gas Boilers
HOT WATER SUPPLY SYSTEM USING GENESIS
®
 BOILERS
With Ac-U-Temp, A. O. Smith makes it easy as possible to install a complete packaged hot water 
supply system, combining 84% efficient Genesis
®
 boilers with storage tanks up to 1,000 gallons. 
Each Ac-U-Temp system is custom-made to your specifications for each application and shipped 
fully assembled, pre-piped and pre-wired. All the installer has to do is make the flue, gas, 
electrical and water connections, so installations are easy.
Consult your A. O. Smith representative for more information on the wide range of available 
boiler/storage tank combinations using the Ac-U-Temp system.
GENESIS® BOILERS–UP TO 84% THERMAL EFFICIENCY
•  The highest possible efficiency for a non-condensing boiler
•  Available inputs range from 300,000 to 2,500,000 BTU
•  Flexible conventional-vent or sealed-combustion direct-vent options
•  For complete information on Genesis
®
 Hot Water Supply Boilers, 
consult Specification Sheet
GLASS-LINED STORAGE TANKS
•  Standard capacities up to 1,000 gallons
•  Custom tanks available up to 10,000 gallons
•  Standard tanks are factory jacketed and insulated – bare uninsulated
tanks also available
•  Optional cement or epoxy-lined tanks available
•  For complete information on standard tanks, consult tank spec
sheet or see your local rep
MULTIPLE BOILER SYSTEMS
•  Ac-U-Temp systems can be designed with multiple boilers to
provide 50%–100% back-up
•  Boilers can be on & off fired, or sequenced to meet changing system demands
•  Sequenced multi-boiler systems with small storage tanks are ideal for applications with
relatively constant hot water demands
•  Optional sequenced control panel available
MULTIPLE TANK SYSTEMS
•  Ac-U-Temp systems can be designed with multiple tanks for applications with low ceiling
heights or other unique installation challenges
DUAL ENERGY SOURCE OPTION
•  Storage tanks can be specified with heat exchangers to allow winter/summer heating boiler
operation
•  Water-to-water or steam-to-water heat exchangers available in both single-wall or double-
wall design
•  Complete control packages can be factory-installed for “hook up and run” simplicity
OPTIONAL
MODELS 
GWT-300
through 
GWT-2500
CRN