Installation manual
7
RXYSQ4~ RXYSQ4~6P7Y1B
VRVIII-S system air conditioner
4PW35338-1
9.
R
EFRIGERANT
PIPING
■
Field pipes can be installed in four directions.
Figure - Field pipes in four directions
When connecting the piping in the lateral direction (on the rear),
remove the piping cover (rear) in reference to
■
To install the connecting pipe to the unit in a downward direction,
make a knockout hole by penetrating the center area around the
knockout hole using a Ø6 mm drill.
■
Cutting out the two slits makes it possible to install as shown in
(Use a metal saw to cut out the slits.)
■
After knocking out the knock-out, it is recommended to apply
repair paint to the edge and the surrounding end surfaces to
prevent rusting.
For RXYSQ6 only
The size of the gas side stop valve is Ø15.9 while the inter-unit piping
is Ø19.1. Use the standard supplied accessory piping to make the
connection. See
.
9.1.
Preventing foreign objects from entering
Plug the pipe through-holes with putty or insulating material (field
supply) to stop 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.
9.2.
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
stop 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.
NOTE
You must use a torque wrench but if you are obliged to
install the unit without a torque wrench, you may follow
the installation method mentioned below.
After the work is finished, make sure to check that
there is no gas leak.
When you keep on tightening the flare nut with a
spanner, there is a point where the tightening torque
suddenly increases. From that position, further tighten
the flare nut within the angle shown below:
1
Drill
2
Center area around knockout hole
3
Knockout hole
4
Slit
5
Connecting pipe liquid (field supply)
6
Bottom frame
7
Front plate
8
Pipe outlet plate
9
Screw front plate
10
Pipe outlet plate screw
11
Connecting pipe gas (field supply, except RXYSQ6)
A
Forward
B
Backward
C
Sideways
D
Downward
1
Piping cover (rear)
Pipe size
Further tightening
angle
Recommended
arm length of tool
Ø9.5 (3/8")
60~90°
±200 mm
Ø15.9 (5/8")
30~60°
±300 mm
Ø19.1 (5/8")
20~35°
±450 mm
A
Front connection
B
Rear connection
C
Side connection
D
Bottom connection
1
Gas line copper gasket supplied with the unit (make sure
to always use the copper gasket).
2
Gas line piping supplied with the unit
3
Gas piping (field supply)
4
Cut to the appropriate length.
5
Gas line piping supplied with the unit
1
Putty or insulating material (field
supply)
Make sure to keep the valve open during operation.
1
Service port
2
Stop valve
3
Field piping connection
4
Valve cover
1
Spanner
2
Torque wrench
1
3
4
1
2
2