4f
Water piping — refrigeration systems
27
Part Number
550-110-290/0219
CGt
GAS-FIRED WATER BOILER — Series 2 —
Boiler Manual
Prevent chilled water from entering boiler
Install boiler so that chilled medium is piped in parallel with the heating boiler. Use appropriate
valves to prevent chilled medium from entering boiler. See Figure 22 for typical installation
of balancing valve and check valve.
If boiler is connected to heating coils located in air handling units where they can be exposed
to refrigerated air, use flow control valves or other automatic means to prevent gravity circula-
tion during cooling cycle.
Figure 22 Piping refrigeration
systems