Hitachi UTOPIA R410A Series - Page 47

10.3 COMMON WIRING
! CAUTION
Alltheeldwiringandelectricalcomponentsmustcomplywithlocalcodesandregulations.
10.3.1 Electrical wiring between indoor unit and outdoor unit
 Connect the electrical wires between the indoor unit and the
outdoor unit, as shown below.
 Open a hole near the connection hole of power source
wiring when multiple outdoor units are connected from one
power source line.
 The recommended breaker sizes are detailed in the Wire
size section.
 
rubber bushes with adhesive on the panel.
Power source from the outdoor unit to the indoor unit (example) Independent power source of outdoor unit and indoor unit (example)
3
3
3
L1 L2 L3 NL1 L2 L3 N
L1 L2 L3 N
Nº 0 System
Outdoor unit
Nº 0 System
Outdoor unit
Operating Line
(Shielded Pair Cable)
DC5V (Non-Pole Transmission,
H-LINK System)
Remote Control Switch
(Twisted Shielded Pair Cable)
Operating Line
(Twisted Shielded
Pair Cable)
DC5V (Non-Pole
Transmission, H-LINK
System)
Indoor Unit Indoor Unit
Terminal board
Circuit Breaker
Earth leakage Breaker
Field Wiring
Field supplied
Optional Accessory
Remote Control Switch
(Twisted Shielded Pair Cable)
Indoor Unit
Indoor Unit
10.3.2 Wire size

Connection wiring

Model Power supply
Power
source
cable size
Transmitting
cable size
EN60335-1 EN60335-1
All Indoor Units
(except 8, 10, 16 and
20HP)
1~ 230V 50Hz
or
1~ 220-
240V 50Hz
(depending on
the model)
0.75 mm²
0.75 mm²
 1~ 230V 50Hz 6.0 mm
2
 3N~ 400V 50Hz 4.0 mm
2
? NOTE
• Followlocalcodesandregulationswhenselectingeldwires,Circuit
breakersandEarthLeakagebreakers.
• Usethewireswhicharenotlighterthantheordinarypolychloroprene
sheathedexiblecord(codedesignation60245IEC57).

Main switch protection
Select the main switches in according to the next table:
Model Power supply
Max
current (A)
CB
(A)
ELB
(nº poles/A/mA)
All Indoor
Units
(except 8,
10, 16 and
20HP)
1~ 230V 50Hz
or
1~ 220-240V
50Hz (depending
on the model)
5.0 6 
ELB: Earth leakage breaker; CB: Circuit breaker
Outdoor unit MC (A) CB (A)
ELB
(nº poles/A/mA)
 22.5 25
 22.5 25
 22.5 25
 15.0 20
 15.0 20
 15.0 20
Electric wiring
PMML0545 rev.2 - 04/2021
16
EN