Electrical Wiring - Hitachi PC-ARFHE Manuel D'utilisation

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 mm
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.
• 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.
3 PMML0358B rev.0 - 12/2015
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
or more)
2
Remote control
switch (Subsidiary)
REMOCON
B