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When loosening a flare nut, always use two wrenches in
combination. When connecting the piping, always use a spanner
and torque wrench in combination to tighten the flare nut.
1
Piping union
2
Spanner
3
Flare nut
12 3
4
4
Torque wrench
See the following table for tightening torque.
(Applying too much torque may cause the flares to crack.)
Tightening
Pipe size
Torque (N•m)
Ø9.5
32.7~39.9
Ø15.9
61.8~75.4
After all the piping has been connected, use nitrogen to perform
a gas leak check.
You must use a torque wrench but if you are obliged to
NOTE
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:
Pipe size
Ø9.5 (3/8")
Ø15.9 (5/8")
9.
R
EFRIGERANT PIPING
Field pipes can be installed in four directions.
Figure - Field pipes in four directions
A
Forward
B
Backward
C
Sideways
D
Downward
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
Gas line piping + copper gasket supplied with the unit (1) (make
sure to always use the copper gasket).
When connecting the piping in the lateral direction (on the rear),
remove the piping cover (rear) and receiver mounting plate in
reference to
figure
7.
1
Receiver mounting plate
2
Piping cover (rear)
Installation manual
7
A (mm)
Flare shape
90 ±2
12.8~13.2
A
19.3~19.7
Further tightening
Recommended
angle
arm length of tool
60~90°
±200 mm
30~60°
±300 mm
(See figure 5)
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
figure
5.
(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.
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
A
Front connection
B
Rear connection
C
Side connection
R=0.4~0.8
D
Bottom connection
1
Gas line piping + copper gasket supplied with the unit (1) (make
sure to always use the copper gasket).
2
Gas line piping supplied with the unit (3)
3
Gas piping (field supply)
4
Cut to the appropriate length.
5
Gas line piping supplied with the unit (2)
9.1. Preventing foreign objects from entering
Plug the pipe through-holes with putty or insulating material
(procured locally) 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 BP unit-outdoor connecting piping are closed
at shipment from the factory.
Make sure to keep the valve open during operation.
The names of parts of the stop valve are shown in the figure.
1
2
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.
1
Spanner
2
Torque wrench
Do not apply force on the valve cover, this may result in a
refrigerant leak.
(See figure
figure
15.
1
1
Putty or insulating material
(procured locally)
1
Service port
2
Shut-off valve
3
3
Field piping connection
4
4
Valve cover
Super Multi Plus System air conditioner
5).
2
RMXS112~160D7V3B
4PW19516-1B
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