Hitachi RCD-0.8FSN3 Installation And Operation Manual page 34

ELECTRICAL WIRING
• Example of Wiring Connection (Twin, Triple and Quad Combinations for Individual Operation)
*
*
Main switch
Main
*
switch
Outdoor unit
Earth
wiring
*
Power source cable
Control cable
Pay attention to the
phase of power source
Shielded twist pair cable 0.75mm
when wiring.
This cable does not need any polarity.
Do not apply an excessively high
voltage to this cable. (Rated voltage:
5V) Connect to both ends of shield
tube to earth.
Model ELB
(n/A/mA)
Combination
*1
Single type
2/40/30
Twin, Triple, Quad
ELB: Earth Leakage Breaker; CB: Circuit Breaker; IU: Indoor unit; OU: Outdoor unit
?
N O T E
For the total wiring length more than 20m, refer to Installation and Operation Manual of the outdoor unit.

For SET-FREE Series
Select wiring capacity according to the following table. Install the ELB, CB and the main switch to each as shown in the figures
below.
Heat pump system
Outdoor
Outdoor unit
power source * *
Main
switch
Indoor unit
power source
Main
switch
*
The details of wire, ELB, CB and main switch for
outdoor unit shall be referred to Installation and
Operation Manual of connected outdoor unit.
30 PMML0425A rev.0 - 02/2016 - P5415720
Remote control
switch (Option)
Indoor unit number 1 Indoor unit number 2
Pull box
Remote control switch cable
(Field supplied)
2
2 core twist pair cable 0.75mm
This cable does not need any polarity.
Do not apply an excessively high voltage to this
cable. (Rated voltage: 5V)
Connect to both ends of shield tube to earth.
CB
Main switch
(Fuse)
Rated Rated
current (A) current (A)
*2 *2
5 5
unit
Indoor Indoor
Indoor
unit
unit
unit
Pull box
Remote control
Remote control
switch (Option)
Indoor unit number 3
Pull box Pull box
2
Transition wiring between
Power
OU and IU
source cable
Power supply
*3 *6 < 20m *4
0.75 1.0
Outdoor unit
power source
* *
Main
switch
Indoor unit
power source
Main
switch
*
The details of wire, ELB, CB and main switch for
outdoor unit shall be referred to Installation and
Operation Manual of connected outdoor unit.
Remote control
switch (Option)
switch (Option)
Indoor unit number 4
The details of wire, ELB, CB and main
*
switch for outdoor unit shall be referred
to Installation and Operation Manual of
connected outdoor unit.
Wiring size (mm )
2
Earth
wiring *7
Control
Circuit *5
0.75 0.75
Heat recovery system
Outdoor
unit
CH unit
Indoor Indoor Indoor
unit unit unit
Pull box
Remote
control switch
cable *8
0.75