Electrical Wiring - Hitachi PC-ARFG-E Bedienungsanleitung

Electrical Wiring

3 ELECTRICAL WIRING
!
D A N G E R
Always make sure to turn off the power of the indoor unit when performing electrical wiring work.
Performing electrical wiring work with the power turned on can damage the circuit boards of the
indoor unit and the remote control switch.
Wiring Example:
Remote
control switch
A B
M3
screws
?
N O T E
• Communication cabling must be a minimum 0.75 mm
must be considered for applications and routing in areas of high electronic interference (EMI) and
other sources of potentially excessive electrical noise to reduce the potential for communication errors.
When shielded cabling is applied, proper bonding and termination of the cable shield is required as
per Johnson Controls-Hitachi Air Conditioning guidelines. Plenum and riser ratings for communication
cables must be considered per application and local code requirements. The use of any other grade
of cable other than that specified above can result in damage from EMI.
• Keep a clearance of more than 30 cm between the transmission line (remote control switch cable
and transmission wires) and the power source of indoor units. Otherwise, the air-conditioner may not
operate properly or malfunction may occur due to the effect of power source noise.
• Refer to the documentation provided with each unit when performing electrical wiring work between
the remote control switch and indoor units, for the proper setting of refrigerant cycle number and indoor
unit address.
• No gap shall exist between the remote control switch cable and the hole of the remote control switch
case. If there is a gap, cover the gap with vinyl tape. Otherwise, malfunction may occur due to the
entrance of water droplets or insects.
• In case of operating with two remote control switches (Main and Sub), set the main and sub remote
control switches by selecting the appropriate function with the remote control switches following the
contents of Function selection and setting chapter. Upon completion of settings, turn off the power
supply of all the indoor unit connected to the remote control switches.
3 PMML0564 rev.1 - 09/2021
Max. 16 Indoor units
Electrical box of
indoor unit
Terminal board
A
B
M3.5
screws
Use 0.75mm cable, 2-Conductor, Stranded Copper
2
Electrical box of
indoor unit
Terminal board
A
B
M3.5
screws
, 2-Conductor, Stranded Copper. Shielded cable
2
Remote control
switch (Subsidiary)
A B