Hitachi RPC-5.0FSR - Page 43


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 gures below.
Heat pump system Heat recovery system
Outdoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Main
switch
Main
switch
Pull box
Indoor unit
power source
Outdoor unit
power source
The details of wire, ELB, CB and main switch for
outdoor unit shall be referred to Installation and
Operation Manual of connected outdoor unit.
Outdoor unit
power source
Outdoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Pull box
Main
switch
Indoor unit
power source
The details of wire, ELB, CB and main switch for
outdoor unit shall be referred to Installation and
Operation Manual of connected outdoor unit.
CH unit
Main
switch
Total indoor
unit capacity
Power Source
Earth wire
size (mm
2
)
*12
Transition
wire size for
control circuit
(mm
2
)
*13
Remote
control
switch cable
(mm
2
)
ELB Main Switch CB (fuse)
Minimum
wire size
(mm
2
)
Wiring
length (m)*1)
*11
(n/A/mA)
*9
Switch
capacity (A)
*10
capacity (A)
*9
< 7A 2/40/30 30 15 2.5 30 2.5 2 Core cable
(Shielded twist
pair cable)
0.75 ~ 1.25
2 core twist
pair cable
0.75
<10A 2/40/30 30 20 4.0 34 4.0
< 15A 2/40/30 30 30 6.0 34 6.0
ELB: Earth Leakage Breaker; CB: Circuit Breaker
*
1):
The above wiring line length shows the case that the indoor units are connected in series. (The voltage drop is within 2%.) When the power
source wiring is longer than the above value, select the minimum wiring size which the voltage drop is within 2%.
? NOTE
• Check the recommended size of the ELB and CB shown in table.
Select high-sensitive high speed ELB when the rated sensitive current
is less than 30mA. (The motion time should be within 0.1 second.)
• Use 2 core cable or 2 core twist pair cable (Shielded twist pair cable
for the total wiring length more than 100m) for the control cable
between the outdoor unit and the indoor unit. The total cable length
should be less than 1000m.
• Use 2 core twist pair cable for the remote control switch cable and the
control cable between indoor units. The total cable length should be
less than 500m. If the total length of the cable is less than 30m, other
cables can be used (the cable size is 0.3mm
2
).
• Select the wiring size, ELB (Earth Leakage Breaker) and isolating
switch (CB (Circuit Breaker)) according to each regulation of region
and Installation and Operation Manual, and the dedicated electrical
circuit must be used.
• On the outside indoor unit, the power source cable, control cable and
remote control cable shall be installed separately as possible.
ELECTRICAL WIRING
PMML0551 rev.4 - 07/2023 - A10762310A
27
EN