5 Installation
Installation and operation manual
9
4BY1
Air-cooled refrigeration condensing unit
4P495373-1 – 2017.07
Subcooling ratio (K)
Te
–20°C
–15°C
–10°C
–5°C
0°C
5°C
Tc
20°C
10
9
8
7
6
5
25°C
11
10
9
8
7
6
30°C
12
11
10
9
8
7
35°C
13
12
11
10
9
8
40°C
14
13
12
11
10
9
45°C
15
14
13
12
11
10
50°C
16
15
14
13
12
11
55°C
16
15
14
13
12
11
4.3
Preparing electrical wiring
4.3.1
Safety device requirements
Power supply
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 legislation based on the information mentioned in the
table below.
Model
Minimum circuit
ampacity
Recommended
fuses
Power supply
LRMEQ3
6.5 A
16 A
3N~ 50 Hz
380-415 V
LRMEQ4
9.1 A
Remote operation switch, low-noise switch and output signals
wiring
NOTICE
Remote operation switch
. The unit is factory-equipped
with an operation switch with which you can turn unit
operation ON/OFF. If you want to remotely turn outdoor
unit operation ON/OFF, a remote operation switch is
required. Use a voltage-free contact for microcurrent
(≤1 mA, 12 V DC). Connect to X2M/C+D, and set to
"Remote ".
The operation switch is located in the switchbox (see illustration
below).
REMOTE
OFF
ON
The operation switch can be set to the following three positions:
Operation switch setting Function
OFF
Unit operation turned OFF
ON
Unit operation turned ON
Remote
Unit controlled (ON/OFF) with remote
operation switch
NOTICE
Low-noise switch
. If you want to remotely turn ON/OFF
low-noise operation (see setting [2‑18]), you must install a
low-noise switch. Use a voltage-free contact for
microcurrent (≤1 mA, 12 V DC). Connect to X2M/A+B.
NOTICE
Output signals
. The outdoor unit is provided with a
terminal (X3M) that can output 4 different signals. The
signal is 220~240 V AC. The maximum load for all signals
is 0.5 A. The unit outputs a signal in the following
situations:
▪ C/C1:
caution
signal – connection recommended –
when an error occurs that does not stop unit operation.
▪ C/W1:
warning
signal – connection recommended –
when an error occurs that causes unit operation to
stop.
▪ R/P2:
run
signal – connection optional – when the
compressor is running.
▪ P1/P2:
operation
signal – connection mandatory –
when the indoor unit solenoid valve is being controlled.
Wiring
Sheathed cable (2 wires)
Vinyl cords
0.75~1.25 mm²
Maximum wiring length
130 m
5
Installation
5.1
Opening the units
5.1.1
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
1×
1
2
5.2
Mounting the outdoor unit
5.2.1
To provide the installation structure
Prepare 4 sets of anchor bolts, nuts and washers (field supply) as
follows:
Summary of Contents for LRMEQ3BY1
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