Instruction manual

Part number 550-142-056/0411
101
GWC gas-fired water boiler — Boiler Manual
Figure 107 Engineering data — see page 99 for additional technical information
Boiler
Model
Water flow rate per boiler
Vent/air pipe size —
Provide a separate vent
for each boiler
Note 1
GPM @ 20°F rise GPM @ 40°F rise
GWC-070
6.5 3.3 3”
GWC-105
9.7 4.9 3”
GWC-140
13.0 6.5 3”
GWC-175
16.1 8.1 3”
Note 1
All GWC installations require a separate vent pipe and termination for each boiler. Vent piping cannot be manifolded.
Install and terminate vents as described in vent/air installation instructions in this manual.
Combustion air piping can be individually piped or manifolded. See Figure 37, page 31, for manifolded air piping.
Dimensions and ratings (continued)