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If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
13.2
Connecting the refrigerant piping
DANGER: RISK OF BURNING/SCALDING
13.2.1
To connect the refrigerant piping to the
indoor unit
Refrigerant piping can be connected from following directions:
c
b
a
Rear right piping
b
Right piping
c
Upward piping
Rear right piping
1 Remove the rear piping pipe port cover and cut out the holes for
piping. When cutting out the holes, make sure to avoid the knob
part of the cover.
a
b
a
Rear refrigerant piping
b
Rear piping pipe port cover
2 Run the field supply pipes through the cut out holes.
3 After the drain and refrigerant piping is finished, install the pipe
port cover back. Run all the cables (except cable of expansion
valve) through the clamp of the pipe port cover and fix.
a b c
a
Clamp of the pipe port cover
b
Cables (except cable of expansion valve)
Upward piping
INFORMATION
L-shaped connection piping kit (optional accessory) is
required.
FXHQ-A
VRV system air conditioner
3P668115-3E – 2022.11
a
1 Remove the top pipe port cover and cut out the holes for piping.
When cutting out the holes, make sure to avoid the knob part of
the cover. Use an L-shaped connection piping kit (optional
accessory) for the piping. Run the pipes through the cut out
holes.
b
a
a
Upward refrigerant piping
b
Top pipe port cover
Right piping
1 Remove the reinforcing plate at the right side and put back the
screw in the original position on the indoor unit.
2 Remove the decoration side panel.
3 Remove the rectangular part of the decoration side panel.
a b
c
d
e
f
a
Round part
b
Rectangular part of the decoration side panel
c
Decoration side panel
d
Screw
e
Reinforcing plate
f
Right refrigerant piping
4 After the drain and refrigerant piping is finished, install the
reinforcing plate (optional step) and the decoration side panel
back.
c
a
b
a
Screw
b
Reinforcing plate
c
Decoration side panel
▪ Pipe length. Keep refrigerant piping as short as possible.
▪ Flare connections. Connect refrigerant piping to the unit using
flare connections.
▪ Insulation. Insulate the refrigerant piping on the indoor unit as
follows:
13 Piping installation
Installation and operation manual
17
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