RMXS112~160D7V3B
Super Multi Plus System air conditioner
4PW19516-1B
Installation manual
8
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For cooling operation under low ambient temperature or any
other operation under low pressure, apply silicon pad or similar
to prevent freezing of the gas stop valve flare nut (see figure).
Freezing of the flare nut may cause refrigerant leak.
9.3.
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.
9.4.
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.
9.5.
Cautions for handling service port
After the work, tighten the valve cover in place.
Tightening torque: 11.5~13.9 N•m
9.6.
Precautions when connecting field piping and
regarding insulation
■
Be careful not to let the BP unit and outdoor branch piping come
into contact with the compressor terminal cover.
If the liquid-side piping insulation might come into contact with it,
adjust the height as shown in the figure below. 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 BP unit and indoor
unit the following can occur:
The condensated water on the stop valve can move to the BP
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.
■
Be sure to insulate the liquid and gas-side field piping and the
refrigerant branch kit.
(The highest temperature that the gas-side piping can reach is
around 120°C, so be sure to use insulating material which is
very resistant.)
Silicon sealing pad
(Make sure there is no gap)
Closing direction
Liquid side
Gas side
Tightening torque
Liquid pipe
13.5~16.5 N•m
Gas pipe
22.5~27.5 N•m
Any exposed piping may cause condensation or burns
if touched.
2
1
3
5
5
A
4
4
6
1
Compressor
2
Terminal cover
3
BP unit and outdoor
field piping
4
Corking, etc.
5
Insulation material
(field supply)
6
Bolts
A
Be careful with pipe,
bolt and outer panel
connections