Vacuum Testing And Charging - Emerson Quiet Kool 21 SEER Series Installation Manual

Installation Instructions

Vacuum Testing and Charging

The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the
compressor. After connecting the indoor and outdoor units, release air and moisture from the refrigerant
cycle using a vacuum pump, as shown below.
Note: To protect the environment, be sure not to discharge the refrigerant to the air directly.
See next page for air purging steps.
indoor unit
Refrigerant flow direction
3-way valve
(7) Turn to fully open the
Service
port
(2) Turn
(8) Tighten Valve cap
How to Vacuum Air Tubes:
(1) Unscrew and remove caps from 2 and 3-way valves.
(2) Unscrew and remove cap from service valve.
(3) Connect vacuum pump flexible hose to the service valve.
(4) Start vacuum pump for 10-15 minutes until reaching a vacuum of 10 mm Hg absolutes.
(5) With vacuum pump still running close the low pressure knob on vacuum pump manifold. Then stop
the vacuum pump.
(6) Open 2-way valve ,1/4 turn, then close it after 10 seconds. Check tightness of all joints using liquid
soap or an electronic leak detector.
(7) Turn 2 and 3-way valves stem to fully open the valves. Disconnect the flexible vacuum pump hose.
(8) Replace and tighten all valve caps.
2-way valve
valve
(1) Turn
(8) Tighten
(6) Open 1/4 turn
(7) Turn to fully open the valve
valve cap
(1) Turn
(8) Tighten
Connect to outdoor unit
12
Vacuum pump
3-way valve diagram
connect to indoor unit
Valve core
open position
spindle
needle
service port cap