Electrical Wiring - Hitachi PC-ARFH2E Manual De Instrucciones

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 (Using a twist pair cable with shield tube: 1P-0.75 mm2 or more)
Remote
control switch
REMOCON
?
N O T E
• Use a 0.3 to 0.75 mm2 cable for connection.
The maximum total cable length is:
- If 3 controllers (Unit + 2 zone thermostats)
are installed: 25 m each one, for a combined
maximum of 75 m.
- If 2 controllers (Unit + 1 zone thermostats)
are installed: 50 m each one, for a combined
maximum of 100 m.
- If 1 controller (Unit) is installed: up to 100 m.
• If total cable length exceeds 30 m, use a twist
pair cable with shield tube (1P - 0.75 mm2). The
use of cables other than those specified above
can cause malfunction due to the effect of noise.
• 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 heat pump
may not operate properly or malfunction may
occur due to the effect of power source noise.
• Refer to the documentation provided with each
unit for the proper settings when performing
electrical wiring work between the remote
control switch and the indoor units.
• 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.
3 PMML0577 rev.0 - 09/2021
Electrical box of unit
Terminal board 2
3
REMOCON 4
A B
Twist pair cable with shield tube:
REMOCON
M3.5
A
screws
1P-0.75mm or more
2
• In case of setting up two or more remote control
switches (Main and Subs), follow the contents
of the supplied technical documentation of the
indoor units in order to select the appropriate
functions in the main and sub remote control
switches. Upon completion of settings, turn off
the power supply of all the indoor units connected
to the remote control switches.
Remote control
switch (Subsidiary)
REMOCON
B