8
CONNECtINg SuppLy ANd REtuRN pIpINg
Connect supply and return piping as suggested in
8.
Figure 6, when boiler is used in connection with
refrigerated systems:
Chilled medium must be in parallel with the boiler.
A.
Use appropriate valves to prevent chilled medium
B.
from entering heating boiler.
During heating cycle open valves A and B, close valves
9.
C and D.
During heating cooling cycle open valves C and D, close
10.
valves A and B.
Maintain minimum clearance of one inch to hot
A.
water pipes.
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.
For further piping information refer to the I=B=R
11.
installation and piping guide.
Figure 6
