Air Purging; Vacuum Pump - Whirlpool SLIM RANGE R22 Instructions For Use Manual

33933049GB.fm Page 22 Monday, January 10, 2005 5:27 PM

Air purging

Air containing moisture remaining in the refrigerant cycle may cause a malfunction of the compressor. After connecting
the indoor and outdoor units, evacuate air and moisture from refrigerant cycle using a vacuum pump, as shown below.
Service
port
(2) Turn
(8) Tighten
3-way valve diagram
Note:
Because the system pressure is high and also to protect the environment, be sure not to discharge the
refrigerant to the air directly.
22
Indoor unit
Refrigerant flow direction
3-way valve
(7) Turn to fully open the valve
(1) Turn
(8) Tighten
Valve cap
Connect
to outdoor
unit
Valve core

Vacuum pump

2-way valve
(6) Open 1/4 turn
(7) Turn to fully open the valve
Valve cap
(1) Turn
Connect to indoor unit
Open position
Spindle
Needle
Service port cap
(8) Tighten