Panasonic CS-MC90KH / CU-MC140KH / CS-MC90KH / CU-MC180KH / CS-MC90KH / CU-3MC200KH Service Manual ▷ View online
– 28 –
ORDER NO. MAC9807010C3
CS-MC90KH
Installation parts you must
purchase (
purchase (
*
)
Installation plate
1
Sleeve (
*
)
Bushing-Sleeve (
*
)
Putty, (Gum Type Sealer) (
*
)
Bend the pipe as closely on the
wall as possible, but be careful
that it doesn’t break.
wall as possible, but be careful
that it doesn’t break.
Vinyl tape (Wide) (
*
)
•
Apply after carrying out a
drainage test.
drainage test.
•
To carry out the drainage
test, remove into the air filters
and pour water into the heat
exchanger.
test, remove into the air filters
and pour water into the heat
exchanger.
Saddle (
*
)
Connecting cable
(3-CORE WIRE/1.5 mm
(3-CORE WIRE/1.5 mm
2
)
Locally approved cable.
•
This illustration is for explanation purposes only.
The indoor unit will actually face a different way.
The indoor unit will actually face a different way.
•
Carry out insallation
after checking for gas
leaks.
after checking for gas
leaks.
•
After securing with
three of the vinyl
tape
three of the vinyl
tape
7
, wrap with
vinyl tape
8
.
Vinyl tape
8
Air purifying filter
5
Vinyl tape
7
(Left and right are identical)
Additional drain hose (
*
)
Vinyl tape (
*
)
(Narrow)
1/4" Liquid side piping (
*
)
3/8" Gas side piping (
*
)
1/4" Liquid side piping (
*
)
3/8" Gas side piping (
*
)
Installation Information
Indoor / Outdoor unit installation diagram
Piping direction
Attention not to bend up drain hose
Right
rear
rear
Right bottom
Left
rear
rear
Left bottom
Left
(Front side)
Right
,
,,
5 cm or
more
5 cm or
more
150 cm
or more
10 cm
or more
30 cm
or more
Insulation of piping connection
Attaching the remote control holder to the wall
Remote
Control
Control
3
Remote Control holder
fixing screws
fixing screws
!
Remote
Control
holder
Control
holder
9
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– 29 –
ORDER NO. MAC9807010C3
CS-MC90KH
3-way Valve
Shaft Position
Closed
(With valve cap)
Closed
(Clockwise)
Open
(With valve cap)
Open
(Counter-clockwise)
Open
(Counter-clockwise)
Open
(Counter-clockwise)
Open
(Counter-clockwise)
Open
(Counter-clockwise)
Service Port
Closed
(With cap)
Open
(Connected manifold
gauge w/charging
cylinder)
Closed
(With cap)
Closed
(With cap)
Open
(Connected manifold
gauge)
Open
(Connected manifold
gauge)
Closed
(With cap)
Open
(Connected manifold
gauge)
3-way Valve (Liquid Side)
3-way Valve (Gas Side)
Service Port
Closed
(With cap)
Open
(Push-pin)
Closed
(With cap)
Open
(Connected manifold
gauge)
Open
(Connected manifold
gauge)
Open
(Connected manifold
gauge)
Open
(Connected manifold
gauge)
Open
(Connected manifold
gauge)
Works
Shipping
Air purging
Installation and
Re-installation
Operation
Pumping down
(Transferring)
Evacuation
(Servicing)
Gas charging
(Servicing)
Pressure check
(Servicing)
Gas releasing
(Servicing)
Valve cap
To
piping
connection
piping
connection
Shaft Position
Closed
(With valve cap)
Closed
(Clockwise)
Open
(With valve cap)
Closed
(Clockwise)
Open
(Counter-clockwise)
Open
(Counter-clockwise)
Open
(Counter-clockwise)
Open
(Counter-clockwise)
Flare nut
Hexagonal wrench(4 mm)
Open position
Closed position
Closed position
Pin
Service
port cap
port cap
To outdoor unit
Service port
To
piping
connection
piping
connection
Flare nut
Open position
Closed position
Closed position
Pin
Service port
To outdoor unit
Service
port cap
port cap
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– 30 –
ORDER NO. MAC9807010C3
CS-MC90KH
1 Air purging
Required tools: Hexagonal wrench, adjustable wrench,
torque wrenches, wrench to hold the
joints, gas leak detector, and charging
set.
joints, gas leak detector, and charging
set.
The air in the indoor unit and in the piping must be
purged. If air remains in the refrigeration pipes, it will
affect the compressor, reduce the cooling capacity, and
could lead to a malfunction.
purged. If air remains in the refrigeration pipes, it will
affect the compressor, reduce the cooling capacity, and
could lead to a malfunction.
Service port cap
Be sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents the gas
leakage from the refrigeration cycle.
Be sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents the gas
leakage from the refrigeration cycle.
Procedure:
(1) Recheck the piping connections.
(2) Open the valve of the low pressure side of
Manifold gauge counterclockwise for 10 seconds,
and then close it.
and then close it.
(3) Check for gas leakage.
●
Check the flare connections for gas leakage.
(4) Purge the air from the system.
●
Open the Low pressure side valve of the manifold gauge.
●
Press the valve core pin with the hexagonal wrench to
purge the air for three seconds and then wait for one
minute.
Repeat this three times or more.
purge the air for three seconds and then wait for one
minute.
Repeat this three times or more.
(5) Balance the refrigerant in the pipings and the
indoor unit.
●
Close the Low pressure side valve of the manifold gauge.
●
Press the valve core pin with the hexagonal wrench to
release the refrigerant until the gauge indicates.
release the refrigerant until the gauge indicates.
(6) Use torque wrench CWH AD-9211 to tighten the
service port nut to a torque of 1.8kg-cm.
(7) Set the both 3-way valve to the open position.
(8) Mount the valve stem nuts to the 3-way
valves.
(9) Check for gas leakage.
●
At this time, especially check for gas leakage from the
both 3-way valve’s stem nuts, and from the service port
caps.
both 3-way valve’s stem nuts, and from the service port
caps.
Caution
If gas leakage is discovered in step (3) above, take the
following procedures:
following procedures:
1. Re-tighten the connecting portion with torque
wrenches.
If the leakage ceases, continue the works from
step (4).
If the leakage ceases, continue the works from
step (4).
2. Locate and repair the leak. (Gas leak detector)
Repeat the works from step (1).
Open
D
Closed
Lo
Hi
Closed
(Outdoor unit)
3-way
valve
Closed
Closed
3-way
valve
(Liquid side)
(Gas side)
(Indoor unit)
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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)
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31
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