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8.
Connect supply and return piping as suggested in
Figure 6, when boiler is used in connection with
refrigerated systems:
A.
Chilled medium must be in parallel with the boiler.
B.
Use appropriate valves to prevent chilled medium
from entering heating boiler.
During heating cycle open valves A and B, close valves
9.
C and D.
10.
During heating cooling cycle open valves C and D, close
valves A and B.
Figure 6
CONNECtINg SuppLy ANd REtuRN pIpINg
In air handling units where they may be exposed to
refrigerated air circulation, boiler piping system MUST be
supplied with flow control valves or other automatic means
to prevent gravity circulation of boiler water during cooling
cycle.
11.
8
A.
Maintain minimum clearance of one inch to hot
water pipes.
For further piping information refer to the I=B=R
installation and piping guide.
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