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Electrical installation
Installer and user reference guide
96
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
Details – Output signals
NOTICE
Output signals
. The outdoor unit is provided with a terminal (X4M) 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
Sheathed cable (2 wires)
Vinyl cords
0.75~1.25 mm²
Maximum wiring length
130 m
Details – Power supply
"17.5 Specifications of standard wiring components"
92].
17.7 Connections to the capacity up unit
NOTICE
▪
Be sure to keep the power line and transmission line apart from each other
(≥50 mm). Transmission wiring and power supply wiring may cross, but may not
run parallel.
▪
Transmission wiring and power supply 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.
Low voltage wiring
▪
DIII transmission wiring
▪
Remote switches (operation, low noise)
High voltage wiring
▪
Output signals (caution, warning, run)
▪
Power supply (including earth)
