Electrical Wiring - Hitachi PC-ARH E Installations- Und Betriebshandbuch

Electrical Wiring

10
3. ELECTRICAL WIRING
3.1. STANDARD WIRING

ATTENTION:
Attach the ring core (black) (accessory) when
installing the unit.
Insert the controller cable into the ring core,
2 turns, as shown in the left fi gure, before
connecting to the terminal board. If wiring is
0.75 mm it is necessary to peel the outside
2
cover.
Fix the cable by using the band (accessory)
3.2. ELECTRICAL WIRING FOR MULTIPLE UNITS
This remote control switch can control sixteen units, as the maximum.

ATTENTION
- Use 0.3-0.75 mm cable (max. total cable length 30m). If the total cable length is longer than 30m, use twist pair cable (1P–0.75 mm
2
total cable length 200m). When use with the control timer, (max. total cable length 100m). Using other cables may cause malfunction due to
noise.
- Keep a distance of more than 30 cm between the remote control / indoor unit transmission cables and the power wiring.
- If installed within 30 cm, put the cables in a conduit tube and earth (type-D; ≤ 100Ω) one end of the pipe. Without this procedure, malfunction or
failure of the air conditioner due to noise may occur.
- When multiple indoor units are simultaneously controlled, set addresses for refrigerant cycle and indoor units. Especially when the indoor units
from multiple refrigerant cycle are simultaneously controlled, transmission abnormality may occur due to address duplication.
- For more information about wiring remote control switch-indoor unit and setting indoor units addresses, see the indoor units "INSTALLATION
MANUAL".
- Do not leave any space at the cable opening of the remote controller case. If there is any space, cover it with, e.g., vinyl tape to avoid trouble
caused by dew or insects entering into the controller case.
- To use two remote controller (main/sub controllers), follow the procedure in 4. "FUNCTION SELECTION" to confi gure main/sub remote
controllers. Before setting, turn OFF the power of all the indoor units connected to the remote control switch.
Max. 16 indoor units
Terminal Board Terminal Board
M3.5
screws
Twist Pair cable:
1 P - bigger than 0.75mm
Band
Control wiring
M3.5
screw
2
Ring Core
) (max.
2