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8
A Pipe as shown for gravity return systems, connecting
point A to the wet gravity return.
For pumped-return systems, install boiler water level
in Figure 30 on page 30. Provide at point A
boiler,
each boiler.
B For pumped-return systems, install a combination
float and thermostatic trap on each boiler to prevent
flooding of one boiler while other boiler is firing. Install
condensate receiver.
Gravity-return systems are self-levelling if the wet
returns are piped to the common system wet return.
C
through 19).
Part No. 550-141-935/0215
Multiple Steam Boiler Piping Gravity Condensate Return
or . . .
(continued)
D
For pump-return systems, if using automatic steam
valves, use only slow-opening automatic valves. Use
panel) to open each steam valve automatically before
firing burner.
E
at least same size as largest boiler header size.
F
G Install drip line in common supply drop header.
trap and drain to condensate receiver.
19
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