〖Exhaust〗
1.
Exhausting type
⚫ Make sure that all the tubes of indoor and outdoor unit are connecting well.
⚫ Take off valve bonnet and service port valve bonnet from two-port valve (small pipe cut-off valve) and
three-port valve (large pipe cut-off valve).
⚫ Turn counter-clockwise 1/4 turn the spool of two-pot valve, close after 10 seconds.
⚫ To check whether there are leakage at all connections.
⚫ If there is no leakage, turn again two-port valve counter-clockwise 1/4 turn, at the same time hold out
against the exhaust from valve inside of service port of three-port valve for 10 seconds.
⚫ Open two-port and three-port valves for running.
⚫ Screw tightly the valve bonnet.
⚫ Check with soap water or leak detector whether there are leakage at all indoor and outdoors’
connections.
⚫ Put the valve bonnet and valve cover back to the position.
Narrow tube
2.
Pumping type
⚫ Make sure that all the tubes of indoor and outdoor unit are connecting well.
⚫ Take off valve bonnet from two-way and three-way valves by spanner; connect vacuum pump and
compound valve to the service valve bonnet.
⚫ Open the low-pressure switch of compound valve, and run vacuum pump until units’ internal
pressure at 10 mmHg.
⚫ After pump vacuum, close the low-pressure switch of compound valve, and then close vacuum
。
pump. Turn anti-clockwise 90 Spool of narrow pipe service valve by hexagon spanner, tightly with
clockwise turning after stopping for 10 seconds.
⚫ Check with soap water or leak detector whether there is leakage at all connections of indoor and
outdoor unit.
⚫ Open wide and narrow pipe service valves by hexagon spanner for running.
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