Hitachi RPC-1.5FSR Installations- Und Betriebshandbuch Seite 67

ELECTRICAL WIRING
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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.
ELB
Total indoor
unit capacity
(n/A/mA)
*9
< 7A 2/40/30
<10A 2/40/30
< 15A 2/40/30
ELB: Earth Leakage Breaker; CB: Circuit Breaker
* 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
1):
source wiring is longer than the above value, select the minimum wiring size which the voltage drop is within 2%.
?
N O T E
• 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
• 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.
27 PMML0551 rev.1 - 02/2021 - A10762310A
unit
Indoor Indoor
Indoor
unit
unit
unit
Pull box
Power Source
Main Switch CB (fuse)
Switch
capacity (A)
capacity (A)
*9
*10
30 15
30 20
30 30
).
2
Heat recovery system
Outdoor unit
power source
Main
switch
Indoor unit
power source
Main
switch
Minimum Wiring
wire size length (m)*1)
(mm ) *11
2
2.5 30
4.0 34
6.0 34
Outdoor
unit
CH unit
Indoor
Indoor Indoor
unit
unit
unit
Pull box
The details of wire, ELB, CB and main switch for
outdoor unit shall be referred to Installation and
Operation Manual of connected outdoor unit.
Transition
Earth wire wire size for
size (mm ) control circuit
2
*12 (mm )
2
*13
2.5 2 Core cable
(Shielded twist
4.0
pair cable)
6.0
0.75 ~ 1.25
Remote
control
switch cable
(mm )
2
2 core twist
pair cable
0.75