HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODAKU, TOKYO
100-8310, JAPAN
7-4 GAS CHARGE
1
Connect gas cylinder to the service port of stop valve (3-way).
2
Execute air purge of the pipe (or hose) coming from refrigerant gas cylinder.
3
Replenish specified amount of the refrigerant, while operating the air conditioner
for cooling.
Note:
In case of adding refrigerant, comply with the quantity specified for the refrigerating
cycle.
CAUTION
•
Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installation,
reinstallation, or repairs to the refrigerant circuit.
•
When charging the refrigerant system with additional refrigerant, be sure
to use liquid refrigerant.
Adding gas refrigerant may change the composition of the refrigerant in the
system and affect normal operation of the air conditioner. Also, charge the
system slowly, otherwise the compressor will be locked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm
water (under 40°C) during cold season. But never use naked fire or steam.
1
Remove the screw caps.
2
Remove three screws.
3
Pull the bottom.
Hold this concave section and pull the bottom
forward to remove the front panel.
4
Release the hooks.
Push
Go down
Square hole
5
Push
Horizontal vane
3
2 4
1
Point the
horizontal
vane slightly
downward.
7. FOR MOVEMENT AND MAINTENANCE
7-1 REMOVING AND REINSTALLING THE FRONT PANEL
FRONT PANEL REMOVAL
FRONT PANEL REINSTALLATION
Note:
Do not open the front panel up beyond the level position.
The panel may come off in order to prevent it from being damaged.
1
Set the horizontal vane to the position as below before reinstalling the front
panel.
2
Attach the bottom of the front panel under the horizontal vane.
3
Fit in the top of the front panel.
4
Fit in the bottom of the front panel and tighten it using screws.
5
Push the section of the front panel marked by the arrow and fit the panel into the
air conditioner.
7-2 PUMPING DOWN
When relocating or disposing of the air conditioner, pump down the system following
the procedure below so that no refrigerant is released into the atmosphere.
1
Connect the gauge manifold valve to the service port of the stop valve on the gas
pipe side of the outdoor unit.
2
Fully close the stop valve on the liquid pipe side of the outdoor unit.
3
Close the stop valve on the gas pipe side of the outdoor unit almost completely
so that it can be easily closed fully when the pressure gauge shows —0.101 MPa
[Gauge] (0 kgf/cm
2
).
4
Start the EMERGENCY COOLING OPERATION.
To start the EMERGENCY OPERATION in COOL MODE, disconnect the power
supply plug and/or turn off the breaker. After 15 seconds, connect the power
supply plug and/or turn on the breaker, and then press the EMERGENCY
OPERATION switch once. (The EMERGENCY COOLING OPERATION can be
performed continuously for up to 30 minutes.)
5
Fully close the stop valve on the gas pipe side of the outdoor unit when the
pressure gauge shows 0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm
2
).
6
Stop the EMERGENCY COOLING OPERATION.
Press the EMERGENCY OPERATION switch twice to stop the operation.
7-3 REMOVING THE INDOOR UNIT
Remove the bottom of the indoor unit from the installation plate.
1
Remove the front panel. (See FRONT PANEL REMOVAL shown above.)
2
Insert flat screwdrivers into the square holes at the left and right bottom of the
indoor unit and push them up; the bottom of the indoor unit goes down and the
hooks are released.
Union
Indoor unit
Liquid pipe
Gas pipe
Stop valve
Service port
Gauge manifold valve
(for R410A)
Charge hose (for R410A)
Outdoor unit
Refrigerant gas
cylinder operating
valve
Refrigerant gas cylinder for
R410A with siphon
Refrigerant (liquid)
Electronic scale for
refrigerant charging
