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GSA
Gas-Fired Steam Boilers –
Boiler Manual
11
Part Number 550-110-738/1012
3 Install piping
General
1. Pipe before installing controls. Connect return piping after
jacket is attached. Connect supply piping before or after jacket
is attached.
Failure to properly pipe the boiler may result in
improper operation and damage to the boiler or
building.
2. See Figure 12 and Table 6. Pipe exactly as shown.
3. Satisfactory operation of a steam heating system depends
on adequate condensate return to boiler to maintain a steady
water level. Avoid adding raw makeup water. Where conden-
sate return is not adequate, refer to recommendations on
page 13.
Figure 12
Recommended piping, piping for parallel-flow
systems only.
(see Table 6 for recommended sizing)
Table 6
Recommended pipe sizing
Connecting to counterflow piping
Apply the recommended piping in Figures 12 and 14 only when
connecting to a parallel‑flow system. When connecting to a
counterflow system, the boiler steam supply must connect into
the top of the counterflow system header, as shown in Figure 13.
Figure 13
Connection to counterflow steam piping
(see Table 6 for recommended sizing)
Boiler model number
Riser (A) Header (H)
see Note
Equalizer (J)
GSA-075 and GSA-100
2”
2”
1 ½”
GSA-125 through GSA-175
2 ½”
2 ½”
1 ½”
GSA-200, GSA-250 & GSA-300
3”
3”
1 ½”
Note:
24” minimum from waterline to bottom of header.