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MAC9702008C2
CS-MC90KE
6 Gas charging
(After Evacuation)
Procedure:
(1) Connect the charge hose to the charging
cylinder.
● Connect the charge hose which was disconnected from
the vacuum pump to the valve at the bottom of the
cylinder.
(2) Purge the air from the charge hose.
● Open the valve at the bottom of the cylinder and use a
screwdriver to press the check valve on the charge set to
purge the air (be careful of the liquid refrigerant).
(3) Open the High side on the charge set and charge
the refrigerant to the unit.
● Be sure to open only the High side valve on the charge
set to charge the system from the liquid-side (high-
presure) pipe. (If the system cannot be charged with the
specified amount of refrigerant, operate the compressor
until the specified amount can be charged, and then
close the valve at the bottom of the charge cylinder.)
(4) Immediately disconnect the charge hoses from
both 3-way valve service ports.
(5) Mount the valve stem nuts and the service port
caps onto the 3-way valves.
● Use torque wrench to tighten the service port caps to a
torque of 18 N•m.
● Be sure to check for gas leakage.
(Indoor unit)
(Liquid side)
3-way valve
(Outdoor unit)
3-way valve
Open
Charging
cylinder
(Gas side)
Lo Hi
Check valve
CLOSE
Open
OPEN
Untitled-26 6/25/00, 5:33 PM35
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