8 Connect steam boiler piping
General steam piping information:
•Hartford loop piping arrangement and wet return are required for steam boilers. Use the Hartford loop for both
•Maintain
•When using condensate receiver, feed pump must be energized by
Install piping as shown on pages 16 through 18 for single boilers. See page 19 for additional requirements when piping multiple boilers.
Improperly piped systems or undersized piping can contribute to erratic boiler operation and possible boiler or system damage. Piping system must be installed as shown, using pipe sizes shown. Pipe sizes shown are for
1.Connect supply and return piping:
a.See Table 8.
1)Size condensate return piping by pump.
2)Size gravity condensate return same as equalizer “J” pipe size.
b.Install system drain valve in lowest part of return piping close to boiler. ASME size requirements are shown in Table 7, page 14.
c.Connect cold water fill piping as shown in Figure 14. Also shown are recommended valves and water meter, if used. Water meter will detect added makeup water, indicating leaks in system.
2.Condensate piping:
a.Satisfactory operation of any steam heating system depends on adequate return of condensate to maintain steady water level.
b.Avoid adding excessive amounts of raw
c.Where condensate return is not adequate, a low water cutoff with pump control, condensate receiver, and condensate boiler feed pump should be installed. Refer to page 18, Figure 18 for piping and Table 9 for sizing.
3.Multiple steam boiler piping
a.See page 19.
Figure 14 Cold water fill piping
Table 8 | Steam boiler pipe size for typical |
16 | Part No. |
