Field Wiring: Overview; About The Electrical Wiring - Daikin VRV IV Q+ Series Installer And User Reference Manual

19 | Electrical installation

19.1.2 Field wiring: Overview

19.1.3 About the electrical wiring

Installer and user reference guide
108
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.
Field wiring consists of:
▪ power supply (including earth),
▪ DIII transmission wiring between communication box and outdoor unit,
▪ RS‑485 transmission wiring between communication box and monitoring system.
Example:
a
d
i
c
b
a
b
c
e
h
h f
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
It is important to keep the power supply and the transmission wiring separated
from each other. In order to avoid any electrical interference the distance between
both wiring should always be at least 25 mm.
d d
h h
g g
e e
h h
h h
f f
RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10