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ORDER NO. MAC9807010C3
CS-MC90KH
4
Gas charging
(After Evacuation)
Procedure:
(1) Connect the charge hose to the charging cylinder.
●
Connect the charge hose which you disconnected
from the vacuum pump to the valve at the bottom of
the cylinder.
from the vacuum pump to the valve at the bottom of
the cylinder.
●
If you are using a gas cylinder, also use a scale
and reverse the cylinder so that the system can be
charged with liquid.
and reverse the cylinder so that the system can be
charged with liquid.
(2) Purge the air from the charge hose.
●
Open the valve at the bottom of the cylinder and
press the check valve on the charge set to purge
the air. (Be careful of the liquid refrigerant). The
procedure is the same if using a gas cylinder.
press the check valve on the charge set to purge
the air. (Be careful of the liquid refrigerant). The
procedure is the same if using a gas cylinder.
(3) Open the valve (Lo side) on the charge set and
charge the system with liquid refrigerant.
●
If the system cannot be charged with the specified
amount of refrigerant, it can be charged with a little
at a time (approximately 150g each time) while
operating the air conditioner in the cooling cycle;
however, one time is not sufficient, wait approximately
1 minute and then repeat the procedure. (pumping
down-pin).
amount of refrigerant, it can be charged with a little
at a time (approximately 150g each time) while
operating the air conditioner in the cooling cycle;
however, one time is not sufficient, wait approximately
1 minute and then repeat the procedure. (pumping
down-pin).
(4) Immediately disconnect the charge hose from
the 3-way valve’s service port.
●
Stopping partway will allow the refrigerant to be
discharged
discharged
●
If the system has been charged with liquid refrigerant
while operating the air conditioner, turn off the
air conditioner before disconnecting the hose.
while operating the air conditioner, turn off the
air conditioner before disconnecting the hose.
(5) Mount the valve stem nuts and the service port
cap.
●
Use a 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.
(Gas side)
Charging
cylinder
cylinder
(Indoor unit)
(Liquid side)
3-way valve
Open
3-way valve
Open
OPEN
Hi
Lo
CLOSED
Check valve
(Outdoor unit)
Untitled-19
6/26/00, 3:41 PM
35
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