42
System filling with Propylene Glycol and water
At or near the chiller a flush/fill valve assembly must be installed. This can be made with three ball
valves and a couple hose fittings. See example below.
Pre-mix the propylene in a container large enough to hold the loop volume. Using a filling
pump and 3 hoses, place one hose in the glycol container and connect it to the suction side of
the pump, prime the pump, then connect the other hose to the pump discharge and the other
end to the valve “C” that is closest to the fan coils. Using a third hose, connect it to valve ”B”,
closest to the chiller. Close the middle valve “A”.
Minimum loop pressure is 14.5 psi, maximum
pressure is 43.5 psi, and ideal pressure is 29 psi.
Содержание CX45
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