Commercial Gas Boilers
MODELS
GWT-300
through
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.
GWT-2500
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
CRN
AOSDG61020
Revised August 2008
PG 1 OF 4
Commercial Gas Boilers
BOILER DATA
Model to Specify:
GWT - 650 - AJH - 750A - S
DIMENSIONS
WIDTH
(C1)
MODEL
NUMBER
INCHES OR
CM
LENGTH
(C2)
29-1/2
74.9
35-3/4
90.8
42
106.7
51-3/8
130.5
57-5/8
146.4
47
119.4
57-1/2
146.1
64-1/2
163.8
78-3/4
200
HEIGHT
(D)
32
81.3
32
81.3
32
81.3
32
81.3
32
81.3
42-1/2
108
42-1/2
108
Indicates System
Configuration
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
24
61
24
61
24
61
24
61
GW-300
GW-400
GW-500
GW-650
GW-750
GW-1000
GW-1300
GW-1500
GW-1850
GW-2100
GW-2500
A = ASME Code
Tank Capacity
(Gallons Storage)
Tank Type (AJV = Vertical,
AJH = Horizontal)
Boiler BTU Size
24
61
T =
System
31-3/4
80.6
31-3/4
80.6
31-3/4
80.6
31-3/4
80.6
31-3/4
80.6
31-3/4
80.6
Boiler Type
42-1/2
108
Inches
cm
Inches
cm
Inches
cm
45-1/4
114.9
45-1/4
114.9
45-1/4
114.9
85-1/2
217.2
85-1/2
217.2
VERTICAL STORAGE VESSEL DATA
DIMENSIONS
MODEL NUMBER
INCHES OR CM
INLET HEIGHT
(B2)
HEIGHT (A)
WIDTH (B1)
INLET SIZE
OUTLET SIZE
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
Inches
cm
67-1/4
170.8
88
223.5
84
213.4
97
246.4
99
251.5
106
269.2
101
256.5
86
218.4
118
28
71.1
30
76.2
36
91.4
36
91.4
42
106.7
42
106.7
48
121.9
54
137.2
54
15
38.1
19
49.5
21
53.3
21
53.3
25-1/2
57.2
22-1/2
57.2
24
2
5.1
2-1/2
6.4
2-1/2
6.4
2-1/2
6.4
2-1/2
6.4
2-1/2
6.4
3
7.6
3
7.6
3
7.6
3
7.6
2
5.1
2-1/2
6.4
2-1/2
6.4
2-1/2
6.4
2-1/2
6.4
2-1/2
6.4
3
7.6
3
7.6
3
7.6
3
7.6
AJV-120
AJV-140
AJV-200
AJV-250
AJV-350
AJV-400
AJVT-500
AJV-500
AJV-750
AJV-1000
61
25-1/2
64.8
25-1/2
64.8
25-1/2
64.8
Inches
cm
Inches
cm
299.7
118
299.7
137.2
54
137.2
AOSDG61020
Revised August 2008
PG 3 OF 4
Commercial Gas Boilers
Configuration H
Configuration P
Configuration S
Configuration V
SUGGESTED SPECIFICATION
Hot Water Supply System - shall consist of A. O. Smith Ac-U-Temp® factory assembled unit Model No.______. System shall be completely factory
assembled and shall include the A. O. Smith Genesis hot water supply boiler(s), with input of ______ BTU/H for ______ gas and recovery capacity
of ______ gph, and the A. O. Smith glass-lined (cement/epoxy) hot water storage tank with ______ gallons capacity for ______ mounting (vertical-
horizontal). System shall include properly sized circulator, inlet and outlet thermometers, tank temperature thermometer, relief valve, and tank temperature
control. Entire system shall be rigidly mounted on welded steel skid base and shipped assembled to job site (Ac-U-Temp systems employing tanks too
large for shipping as an assembled unit, will be shipped with the tank mounted on a split bolt-together skid).
See Genesis Boiler Specifications and Storage Tank Specifications in your A & E book. Hot water supply boiler(s) and storage tank(s) shall have a 5 year
limited warranty against corrosion as outlined in the written warranty.
NOTE: Custom arrangement also available. Consult factory.
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.
AOSDG61020
Revised August 2008
PG 4 OF 4
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