16
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Electrical installation
Installer and user reference guide
111
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
X4M
X1M
PE
h
1
2
h
Wiring intake (knockout hole) for high voltage. See
"16.3 Guidelines when knocking
106].
Details – Output signals
NOTICE
Output signals
. The outdoor unit is provided with a terminal (X4M class II
construction) 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 expansion valves of
the connected showcases and blower coils are being controlled.
NOTICE
The operation output P1/P2 of the outdoor unit MUST be connected to all expansion
valves of the connected showcases and blower coils. This connection is required
because the outdoor unit must be able to control the expansion valves during startup
(to prevent liquid refrigerant from entering the compressor and to prevent opening
of the safety valve at the low pressure side of the refrigeration cabinet).
Check on site that the expansion valve of the showcase or blower coil can ONLY open
when P1/P2 signal is ON.
Wiring output signals:
Wiring
Only use harmonised wire providing
double insulation and suitable for the
applicable voltage.
2-cord cable
0.75~1.25 mm²
Maximum wiring length
130 m
Details – Power supply
See
"16.4 Specifications of standard wiring components"
107].