Installation
Installation manual
8
RZAG71~Y1
Sky Air Alpha-series
4P573382-1 – 2019.04
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing and underlying piping.
▪ After making the knockout holes, we recommend to
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
3
Do the following:
▪ Connect the liquid pipe (a) to the liquid stop valve.
▪ Connect the gas pipe (b) to the gas stop valve.
a
b
4
Do the following:
▪ Insulate the liquid piping (a) and the gas piping (b).
▪ Wind heat insulation around the curves, and then cover it
with vinyl tape (c).
▪ Make sure the field piping does not touch any compressor
components.
▪ Seal the insulation ends (sealant etc.) (d).
▪ Wrap the field piping with vinyl tape (e) to protect it against
sharp edges
b
a
c
d
f
e
5
If the outdoor unit is installed above the indoor unit, cover the
stop valves (f, 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.
4.3
Checking the refrigerant piping
4.3.1
Checking refrigerant piping: Setup
a
c
f
c
f
b
d
e h
g
i
a
b
A
B
d
e
R32
R32
A
Setup in case of pair
B
Setup in case of twin
a
Pressure gauge
b
Nitrogen
c
Refrigerant
d
Weighing scale
e
Vacuum pump
f
Stop valve
g
Main piping
h
Refrigerant branch kit
i
Branch piping
4.3.2
To check for leaks
NOTICE
Do NOT exceed the unit's maximum working pressure (see
"PS High" on the unit name plate).
