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vice valve, Operate pump until manometer again
Note. Rise in pressure will be influenced by am-
indicates 2.5 mm hg. abs.
bient temperature. Make sure that vacuum in system is
completely relieved before charging.
(12) Inspect service valve area before install-
(11) Close suction service valve and allow
ing condenser fan (para. 3-21) and fan guard.
unit to stand under vacuum for approximately 12
e. Charging the Unit,
hours. If no noticeable rise in pressure occurs,
(1) Remove the condenser fan (para 3-21)
the system is ready for charging. Close service
and the alternate receptacle cover located on the
valves, remove vacuum pump, manometer and in-
right side immediately beneath the condenser
stall valve caps.
fan.
Figure 6-1. Pressure testing (refrigerant R-22).
6-2
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