Installation
Installer reference guide
25
RZAG71~Y1
Sky Air Alpha-series
4P573381-1 – 2019.04
Routing through
the frame
Choose one of the 3 possibilities:
a
a
a
2
3
1
a
Power supply cable
Note:
Route the interconnection cable
together with the refrigerant piping. See
"6.8.1 To finish the outdoor unit
installation" on page 25
Connecting to the
frame
When cables are routed from the unit, a
protection sleeve for the conduits (PG
insertions) can be inserted at the knockout
hole.
When you do not use a wire conduit,
protect the wires with vinyl tubes to
prevent the edge of the knockout hole from
cutting the wires.
a b c
d
e
A B
A
Inside of the outdoor unit
B
Outside of the outdoor unit
a
Wire
b
Bush
c
Nut
d
Frame
e
Hose
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.
b
c
a
a
Knockout hole
b
Burr
c
Sealant etc.
7
Reattach the service cover. See
.
8
Connect an earth leakage circuit breaker and fuse to the power
supply line.
6.8
Finishing the outdoor unit
installation
6.8.1
To finish the outdoor unit installation
NOTICE
It is recommended that the refrigerant piping between
indoor and outdoor unit is installed in a ducting or the
refrigerant piping is wrapped with finishing tape.
1
Insulate and fix the refrigerant piping and interconnection cable
as follows:
f
b
a
e
d
c
a
Gas pipe
b
Gas pipe insulation
c
Interconnection cable
d
Liquid pipe
e
Liquid pipe insulation
f
Finishing tape
2
Install the service cover.
6.8.2
To close the outdoor unit
2
1
4
3
1×
6.8.3
To check the insulation resistance of the
compressor
NOTICE
If, after installation, refrigerant accumulates in the
compressor, the insulation resistance over the poles can
drop, but if it is at least 1 MΩ, then the unit will not break
down.
▪ Use a 500 V mega-tester when measuring insulation.
▪ Do not use a mega-tester for low-voltage circuits.
1
Measure the insulation resistance over the poles.
If
Then
≥1 MΩ
Insulation resistance is OK. This procedure
is finished.
<1 MΩ
Insulation resistance is not OK. Go to the
next step.
2
Turn ON the power and leave it on for 6 hours.
Result:
The compressor will heat up and evaporate any
refrigerant in the compressor.
3
Measure the insulation resistance again.
