5 Piping installation
Installation manual
9
AZAS100~140MUV/Y
Sky Air Active-series
4P743507-1 – 2023.08
A
B
b
a
A
Stop valve (liquid)
B
Stop valve (gas)
a
Liquid piping
b
Gas piping
4
Insulate the refrigerant piping:
▪ Insulate the liquid piping (a) and the gas piping (b).
▪ Wind heat insulation around the curves, and then cover it
with vinyl tape (e).
▪ Make sure the field piping does not touch any compressor
components (d).
▪ Seal the insulation ends (sealant etc.) (c).
Example: Front connection
A
B
e
c
d
a
b
A
Stop valve (liquid)
B
Stop valve (gas)
a
Liquid piping
b
Gas piping
c
Insulation ends
d
Compressor
e
Vinyl tape
Example: Rear connection
A
B
c
e
d
a
b
A
Stop valve (liquid)
B
Stop valve (gas)
a
Liquid piping
b
Gas piping
c
Insulation ends
d
Compressor
e
Vinyl tape
5
If the outdoor unit is installed above the indoor unit, cover the
stop valves (A,B see above) with sealing material to prevent
condensed water on the stop valves from moving to the indoor
unit.
NOTICE
Any exposed piping might cause condensation.
6
Reattach the service cover and the piping intake plate.
7
Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
a
NOTICE
Do not block the air vents. This could affect air circulation
inside the unit.
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
5.2
Checking the refrigerant piping
5.2.1
Checking refrigerant piping: Setup
R32
a
c
f
b
d
e
a
Pressure gauge
b
Nitrogen
c
Refrigerant
d
Weighing scale
e
Vacuum pump
f
Stop valve
