Hitachi RPC-2.0FSR Installation & Maintenance Manual page 34

(2) For SET FREE Series
Select wiring capacity according to the following table. Install the ELB and the main switch to each as
shown in the figures below.
< Heat Pump System >
Outdoor
Unit
Outdoor Unit
Power Source
ELB Main
Switch
Indoor
Unit
Indoor Unit
*9, *10
Power Source
*11
ELB Main
Pull Box
Switch
Refer to "Installation & Maintenance Manual"
of connected outdoor unit for details of wire,
ELB and main switch for outdoor unit.
Table 7.2 Recommended Wiring Capacity and Size for SET FREE Series
ELB
Total
Rated
Indoor Unit
Current
Capacity
< 7A
<10A
< 15A
ELB: Earth Leakage 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%.
● Check the recommended size of the ELB 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 (equivalent to following cables: VCTF, VCT, CVV, MVVS, VVR or VVF, size: 0.75mm
to 1.25mm 2 (manufactured by HITACHI Cable Co. Ltd.)) or 2 core twist pair cable (equivalent to following
cables: KPEV or KPEV-S (manufactured by HITACHI Cable Co. Ltd.)) 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 (equivalent to following cables: KPEV or KPEV-S) for the controller 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 according to each regulation of
region and "Installation & Maintenance Manual", and the dedicated electrical circuit must be used.
● On the outside indoor unit, the power source cable, control cable and controller cable shall be installed
separately as possible.
28
*13
*13 *13
Indoor Indoor
Unit Unit
*12 *12
*11 *11
Power Source
Main Switch
Switch Fuse
Capacity Capacity
(A) (A) (A)
*9 *10 *10
15 30 15
20 30 20
30 30 30
NOTICE
< Heat Recovery System >
Outdoor Unit
Power Source
ELB Main
Switch
*12
Indoor Unit
*9, *10
Power Source
ELB Main
Switch
Wiring
Line
Minimum
Length
Wire Size
*1)
2 (m)
(mm )
*11
2.5 30
4.0 34
6.0 34
Outdoor
Unit
*13
CH Unit
*13
*13
*11
Indoor Indoor
Unit Unit
*12
*11 *11
Pull Box
Refer to "Installation & Maintenance Manual"
of connected outdoor unit for details of wire,
ELB and main switch for outdoor unit.
Transition
Earth Wire Wire Size
Controller
Size for Control
Cable
(mm 2 ) Circuit
(mm
2
(mm )
*12 *13
2 Core
3.5 Cable 0.75
0.75 ~ 1.25
2 ).
A10762300A-rev.1
*13
Indoor
Unit
*12 *12
*11
2
)
2