Read Panasonic CS-MC90KH / CU-MC140KH / CS-MC90KH / CU-MC180KH / CS-MC90KH / CU-3MC200KH Service Manual online
– 32 –
ORDER NO. MAC9807010C3
CS-MC90KH
2-1 Re-air purging
(Re-installation)
Procedure:
(1) Remove the cap nut from 3-way valves.
●
Remove the cap nut from 3-way valves after carefully
checked whether the piping connection was properly
and certainly done.
checked whether the piping connection was properly
and certainly done.
(2) Confirm that the valve in both 3-way valve
are set to the CLOSED.
(3) Connect the gas cylinder to the liquid-side (high-
pressure) 3-way valve and the charge set to the
gas side (low-pressure) 3-way valve.
gas side (low-pressure) 3-way valve.
●
Remove the flare nut from the service port to connect the
charge set and gas cylinder.
charge set and gas cylinder.
●
Close the valves on the gas cylinder and charge set.
(4) Air purging.
●
Open the valve on the gas cylinder.
●
Open the valve on the charge set, discharge for three
seconds and wait for one minute. Repeat this three
times.
seconds and wait for one minute. Repeat this three
times.
(5) Check for gas leakage.
●
Check the flare connections for gas leakage.
(6) Discharge the refrigerant.
●
Close the valve on the gas cylinder and discharge
the refrigerant until the gauge indicates 3 to 5 kg/cm
the refrigerant until the gauge indicates 3 to 5 kg/cm
2
G.
(7) Disconnect the charge set and the gas
cylinder.
(8) Mount the valve stem cap nuts and the flare nuts
for service port onto the 3-way valves.
(9) Mount the cap nut and service port nut onto the
3-way valves.
●
Be sure to use a torque wrench (CWHAD-9211) to
tighten the service port nut.
tighten the service port nut.
●
Be sure to check for gas leakage.
Charging cylinder
(Indoor unit)
(Outdoor unit)
(Gas side)
3-way valve
3-way valve
(Liquid side)
Lo
Hi
Closed
Open
OPEN
CLOSED
Untitled-19
6/26/00, 3:41 PM
32
Click on the first or last page to see other CS-MC90KH / CU-MC140KH / CS-MC90KH / CU-MC180KH / CS-MC90KH / CU-3MC200KH service manuals if exist.