6
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Installation
Installer and user reference guide
77
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
NOTICE
Do NOT install a phase advancing capacitor, because this unit is equipped with an
inverter. A phase advancing capacitor will reduce performance and may cause
accidents.
NOTICE
NEVER remove a thermistor, sensor, etc., when connecting power wiring and
transmission wiring. (If operated without thermistor, sensor, etc., the compressor
may break down.)
NOTICE
▪
The reversed phase protection detector of this product only functions when the
product starts up. Consequently reversed phase detection is not performed
during normal operation of the product.
▪
The reversed phase protection detector is designed to stop the product in the
event of an abnormality when the product is started up.
▪
Replace 2 of the 3 phases (L1, L2, and L3) during reverse-phase protection
abnormality.
NOTICE
Only applicable if the power supply is three‑phase, and the compressor has an ON/
OFF starting method.
If there exists the possibility of reversed phase after a momentary black out and the
power goes on and off while the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed phase can break the
compressor and other parts.
6.8.2 Field wiring: Overview
Field wiring consists of power supply (always including earth) and indoor-outdoor
communication (= transmission) wiring.
Example:
a
b
d
d
d
c
b
g
g
h
h
c
f
f
f
h
e
e
e
a
h
h
h
h
h
i
a
Field power supply (with earth leakage protector)
b
Main switch
c
Earth connection
d
Outdoor unit
e
Indoor unit
f
User interface
g
Indoor power supply wiring (sheathed cable) (230 V)
h
Transmission wiring (sheathed cable) (16 V)
i
Outdoor power supply wiring (sheathed cable)
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
Summary of Contents for VRV IV+
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