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Electrical installation
Installer and user reference guide
112
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
19.6 To connect the power supply
NOTICE
Never connect the power supply to transmission wiring terminal block. Otherwise
the entire system may break down.
CAUTION
▪
When connecting the power supply: connect the earth cable first, before making
the current-carrying connections.
▪
When disconnecting the power supply: disconnect the current-carrying cables
first, before separating the earth connection.
▪
The length of the conductors between the power supply stress relief and the
terminal block itself must be as such that the current-carrying wires are tautened
before the earth wire is in case the power supply is pulled loose from the stress
relief.
Tightening torque for the terminal screws:
Screw size
Tightening torque (N•m)
M8 (power terminal block)
5.5~7.3
M8 (ground)
NOTICE
When connecting the earth wire, align the wire with the cut out section of the cup
washer. Incomplete earthing may cause electrical shock.
The power supply MUST be clamped to the plastic bracket using field supplied
clamp material to prevent external force being applied to the terminal. The green
and yellow striped wire MUST be used for earthing only.
e
i
f
b
a
c
d
h
e
g
a
Power supply (380~415 V, 3N~ 50 Hz
OR
400 V, 3N~ 60 Hz)
b
Fuse
c
Earth leakage protector
d
Earth wire
e
Power supply terminal block
f
Connect each power wire: RED to L1, WHT to L2, BLK to L3 and BLU to N
g
Earth wire (GRN/YLW). When connecting the earth wire, it is recommended to
perform curling.
h
Clamp the power supply to the bracket using a field supplied clamp to prevent
external force being applied to the terminal.
i
Cup washer.
Multiple outdoor units
To connect the power supply for multiple outdoor units to each other, ring tongues
have to be used. No bare cable can be used.
In that case, the ring washer that is installed by default should be removed.
Attach both cables to the power supply terminal as indicated below:
