Operating instructions

Boiler
model
number
Supply
tappings
(inches NPT)
Return
tappings
(inches NPT)
Gas connection
& manifold size
(Note 3)
(inches NPT)
“A”
Vent
location
(inches)
“D”
Vent
diameter
(inches)
“W”
Jacket
width
(inches)
“H”
Damper
height
(inches)
GWA-052
1¼ 1¼ ½ 5 4 10 45⅜
GWA-070
1¼ 1¼ ½ 5 4 10 52⅜
GWA-105
1¼ 1¼ ½ 6½ 5 13 54⅜
GWA-140
1¼ 1¼ ½ 8 6 16 57⅞
GWA-175
1¼ 1¼ ½ 9½ 6 19 60⅜
GWA-210
1¼ 1¼ ½ 11 7 22 62⅛
GWA-245
1¼ 1¼ ½ 12½ 7 25 64⅞
Note 3: Size gas piping from meter to boiler per local utility requirements.
45
Part Number 550-142-784/0812
GWA Series 2 Gas-Fired Water Boilers – Boiler Manual
14 Dimensions
Figure 23 Dimensional drawing — ALL DIMENSIONS IN INCHES