Refrigerant charging – Carrier 5H User Manual
Page 10
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REFRIGERANT CHARGING
Refer to 5F,H Start-Up and Service Instructions and Carrier
Standard Service Techniques Manual, Chapter 1, for complete
charging information.
Pneumatic Control may be connected to capacity control valve
on all 5F,H compressors except 5F20 and 5F30. A 1/4-inch IPS
connection is located above the capacity control valve on each
compressor.
The capacity control valve is set as described in the Start-Up
and Service book.
The pneumatic control, in effect, resets the control point
upward by the amount of air pressure applied. Do not apply
more than 25 psig. For example, if system suction pressure is 40
psig and the control point setting is 35 psig, an applied air
pressure of 5 psig causes first cylinder to unload.
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