Daikin VRV 5 RXYA8A7Y1B, Installer And User Manual

Page: 127 / 200

20 | Electrical installation
Installer and user reference guide
127
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
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.
20.1.2 About the electrical wiring
It is important to keep the power supply and the interconnection wiring separated
from each other. In order to avoid any electrical interference the distance between
both wiring should always be at least 25 mm.
NOTICE
▪
Be sure to keep the power line and transmission line apart from each other.
Transmission wiring and power supply wiring may cross, but may not run parallel.
▪
Transmission wiring and power supply wiring may not touch internal piping
(except the inverter PCB cooling pipe) 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.
The interconnection wiring outside the unit should be wrapped and routed
together with the field piping.
Field piping can be routed from front or bottom of the unit (going left or right).
Refer to
"18.2.5 To route the refrigerant piping" [ 4 105].
Interconnection wiring limits
(a)(b)(c)
Maximum number of branches for unit-to-unit cabling 16
Maximum wiring length
(distance between outdoor and furthest indoor unit)
1000 m
Total wiring length
(sum of distances between outdoor and all indoor units)
2000 m
Maximum inter-unit wiring length between outdoor units 30 m
Maximum number of independent interconnectable systems 10
Interconnection wiring to cool/heat selector 500 m
(a)
If the total interconnection wiring exceeds these limits, communication errors might occur.
(b)
Sheathed and shielded cables are required for interconnection wiring between outdoor
unit and SV unit. Wiring between SV unit and indoor units does not require shielded
cables.
(c)
For more information about wiring, refer to "20.1.6 Specifications of standard wiring
components" [ 4 132].