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(448 kPa) for HCFC-22, 30 psig (207 kPa) for HFC-134a, and then turn off the
compressor. Repeat this process until the pressure no longer rises, then turn on the
pumpout compressor and pumpout until the pressure reaches 18 in. Hg. (40 kPa
absolute).
f. Close valves 1a, 1b, 3, 4, and 6.
g. Turn off the pumpout condenser water and continue with the Control Test for
Pumpdown, which will lock out the machine compressor for operation.
4. Establish vacuum for service.
a. In order to conserve refrigerant, operate the pumpout compressor until the machine
pressure is reduced to 18 in. Hg vac., ref 30 in. bar. (40 kPa abs.) following Step 3e.
Valve
1a 1b 2 3 4 5 6 7 8 11 12 13 14
Condition
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