14 Electrical installation
Installation and operation manual
32
LREN8~12A7 + LRNUN5A7
CO
₂
ZEAS outdoor unit and capacity up unit
4P704141-1B – 2022.12
14.3
Guidelines when knocking out
knockout holes
▪ To punch a knockout hole in a front panel, hit on it with a hammer.
▪ To punch a knockout hole in the bottom panel, drill holes where
indicated.
▪ After knocking out the holes, we recommend removing any burrs
and paint the edges and areas around the holes using repair paint
to prevent rusting.
▪ When passing electrical wiring through the knockout holes,
prevent damage to the wires by wrapping the wiring with
protective tape, putting the wires through field supplied protective
wire conduits at that location, or install suitable field supplied wire
nipples or rubber bushings into the knockout holes.
Front connection
a
b
f
d
d
c
c
e
e
a
Outdoor unit
b
Capacity up unit
Knockout holes for:
c
Piping
d
High voltage wiring
e
Low voltage wiring
f
Remove burrs
Side connection
2×
b
c
a
a
Knockout plate
b
Drill (Ø6 mm)
c
Drill here
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.
14.4
Guidelines when connecting the
electrical wiring
Tightening torques
X1M (A1P)
a
b
X5M
X4M
X1M
PE
X1M (A1P)
X1M
PE
a
Terminals on outdoor unit
b
Terminals on capacity up unit
Terminal
Screw size
Tightening torque
(N•m)
X1M: Power supply
M8
5.5~7.3
PE: Protective earth
(screw)
M8
X4M: Output signals
M4
1.18~1.44
X5M: Remote
switches
M3.5
0.79~0.97
X1M (A1P): DIII
transmission wiring
M3.5
0.80~0.96
14.5
Specifications of standard wiring
components
NOTICE
We recommend using solid (single-core) wires. If stranded
wires are used, slightly twist the strands to consolidate the
end of the conductor for either direct use in the terminal
clamp or insertion in a round crimp-style terminal. Details
are described in "Guidelines when connecting the electrical
wiring" in the installer reference guide.
Power supply
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable national wiring regulations based on the information
mentioned in the table below.
Make sure that a separate power supply circuit is provided for this
unit and that all electrical work is carried out by qualified personnel
according to local laws and regulations and this manual. An
insufficient power supply capacity or improper electrical construction
may lead to electric shocks or fire.
Model
Minimum circuit
ampacity
Recommended fuses
LREN8*
32 A
40 A
LREN10*
34 A
40 A
LREN12*
36 A
40 A
