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6 Installation
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO
-equivalent) is used to determine the maintenance
2
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2 Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
6.8
Connecting the electrical wiring
6.8.1
About connecting the electrical wiring
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1
Making sure the power supply system complies with the
electrical specifications of the units.
2
Connecting the electrical wiring to the outdoor unit (power
supply, operation switch, low-noise switch and error output).
3
Connecting the main power supply.
Field wiring: Overview
Field wiring consists of the following:
3N~ 50 Hz
380-415 V
L1 L2 L3
a
b
c
X1M
L1 L2 L3
N
a
Earth leakage circuit breaker
b
Fuse
c
Power supply (including earth) (sheathed cable)
d
Low-noise switch
e
Operation switch
f
Error output
NOTICE
Operation switch. An operation switch is required to turn
outdoor unit operation ON/OFF. The outdoor unit cannot
operate without it. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC).
NOTICE
Low-noise switch. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑25]), you must install a
low-noise
switch.
Use
microcurrent (≤1 mA, 12 V DC).
NOTICE
Error output. If system malfunctions are likely to degrade
the articles in the room/showcase, you can install an alarm
(example: lamp). If a malfunction occurs, a signal
(220-240 V AC) is given to the error output (X2M/E1/E2).
Use an alarm with a maximum load of 0.5 A.
Installer and user reference guide
22
X2M
A
B
C
E1 E2
d
e
f
a
voltage-free
contact
for
NOTICE
▪ Field wiring wiring may not touch internal piping in
order to avoid wire damage due to high temperature
piping.
▪ Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
6.8.2
Precautions when connecting electrical
wiring
DANGER: RISK OF ELECTROCUTION
WARNING
All field wiring and components must be installed by a
licensed electrician and must comply with the applicable
legislation.
WARNING
If NOT factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, shall be installed in the fixed wiring.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
NOTICE
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
LRMEQ3+4AY1
Air-cooled refrigeration condensing unit
4P442131-1 – 2016.03
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Troubleshooting
