REQ71+10 REQ71~125B7W1B
Split System air conditioners
4PW19495-1B
Installation manual
6
Preventing foreign objects from entering
Plug the pipe through-holes with putty or insulating material
(procured locally) to close up all gaps, as shown in the figure.
Insects or small animals entering the outdoor unit may cause a short
circuit in the electrical box.
Cautions for handling stop valve
■
The stop valves for indoor-outdoor connecting piping are closed
at shipment from the factory.
The names of parts of the stop valve are shown in the figure.
■
Since the side boards may be deformed if only a torque wrench
is used when loosening or tightening flare nuts, always lock the
shut-off valve with a wrench and then use a torque wrench.
Do not place wrenches on the valve cover.
Do not apply force on the valve cover, this may result in a
refrigerant leak.
■
For cooling operation under low ambient temperature or any
other operation under low pressure, apply silicon sealing pad,
etc. to prevent the freezing of flare nut gas pipe portion of the
stop valve. Refer to the figure.
How to use the shut-off valve
Use hexagonal wrenches 4 mm and 6 mm.
■
Opening the valve
1.
Place the hex wrench on the valve bar and turn counter-
clockwise.
2.
Stop when the valve bar no longer turns. It is now open.
■
Closing the valve
1.
Place the hex wrench on the valve bar and turn clockwise.
2.
Stop when the valve bar no longer turns. It is now closed.
Cautions for handling the valve cover
■
The valve cover is sealed where
indicated by the arrow.
Take care not to damage it.
■
After operating the valve, be sure to tighten the valve cover
properly.
■
Check for refrigerant leakage after tightening the cap.
Cautions for handling service port
■
After the work, tighten the valve cover in place.
Tightening torque: 10.8~14.7 N•m
Precautions when connecting field piping and regarding
insulation
■
Be careful not to let the indoor and outdoor branch piping come
into contact with the compressor terminal cover.
If the liquid-side piping insulation might come into contact with
the compressor terminal cover, adjust the height as shown in
. Also, make sure the field piping does not touch the
bolts or outer panels of the compressor.
■
When the outdoor unit is installed above the indoor unit the
following can occur:
The condensated water on the stop valve can move to the
indoor unit. To avoid this, please cover the stop valve with
sealing material.
■
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, then the thickness of the sealing materials should
be at least 20 mm in order to avoid condensation on the surface
of the sealing.
1
Putty or insulating material
(produced locally)
NOTE
Make sure to keep the valve open during operation.
1
Service port
2
Shut-off valve
3
Field piping connection
4
Valve cover
1
Spanner
2
Torque wrench
Silicon sealing pad
(Make sure there is no gap)
1
3
4
1
2
2
Closing direction
A
Liquid side
B
Gas side
Tightening torque
Liquid pipe
13.5~16.5 N•m
Gas pipe
22.5~27.5 N•m
A
B
