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ORDER NO. MAC9807010C3
CS-MC90KH
2 Pumping down
Procedure:
(1) Confirm that both the 3-way valve are set to the
open position.
●
Remove the valve stem caps and confirm that the valve
stems are in the raised position.
stems are in the raised position.
●
Be sure to use a hexagonal wrench to operate the valve
stems.
stems.
(2) Operate the unit for 10 to 15 minutes.
(3) Stop operation and wait for 3 minutes, then
connect the charge set to the service port of the
3-way valves.
3-way valves.
●
Connect the charge hose with the push pin to the gas
side service port.
side service port.
(4) Air purging of the charge hose.
●
Open the low-pressure valve on the charge set slightly to
purge air from the charge hose.
purge air from the charge hose.
(5) Set the Liquid side 3-way valve to the closed
position.
(6) Operate the air conditioner at the cooling cycle
and stop it when the gauge indicates 0 kg/cm
2
G.
●
If the unit cannot be operated at the cooling
(weather is rather cool), press the Pump Down switch on
the Indoor unit.
(weather is rather cool), press the Pump Down switch on
the Indoor unit.
●
So that the unit can be operated.
(7) Immediately set the 3-way valve to the closed
position.
●
Do this quickly so that the gauge ends up indicating
1 to 3 kg/cm
1 to 3 kg/cm
2
G.
(8) Disconnect the charge set, and mount both the
3-way valve’s stem nuts and the service port cap.
●
Use torque wrench CWHAD-9211 to tighten the service
port nut to a torque of 1.8 N•m.
port nut to a torque of 1.8 N•m.
●
Be sure to check for gas leakage.
Purge the air
(Indoor unit)
(Liquid side)
(Gas side)
CLOSED
CLOSED
Lo
Hi
3-way valve
Closed
Open
3-way valve
(Outdoor unit)
Untitled-19
6/26/00, 3:41 PM
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