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ELECTRIC WIRING
systems, cranes, welding
When the supply cables of the major consumers and the
refrigeration/heating system are very close together.In these
cases, induction in the wiring to the refrigeration/heating
system may arise due to a rapid change in the electricity
consumption of the above consumers and their start-up.
Therefore before starting installation work, check the
regulations and standards concerning adequate protection of
the power supply line.
N O T E
10.3 CONNECTION OF THE POWER SUPPLY CIRCUITS
10.3.1
Supply the power sources to each outdoor unit and indoor unit group respectively. Power source wiring is fundamentally according
to this method (as example).
1
ELB
2
CB
3
S
4
Outdoor
unit C
5
7
48
PMML0479 rev.2 - 02/2018
machinery, etc).
Outdoor unit power source
3N~400V 50 Hz
1
1
ELB
2
2
CB
3
3
S
4
4
Outdoor
Outdoor
unit B
5
unit A
7
4 During the preliminary preparation work of the electricity
supply line for the unit, the provisions in local and national
legislation must never be violated.
5 Check that the earth cable is correctly connected.
D A N G E R
1
ELB (Earth leakage breaker)
2
CB (Circuit breaker)
3
S (Main switch)
4
Power source wiring (O.U)
5
Earth wiring (O.U)
6
ELB
Transmission wiring (O.U ~I.U)
7
Transmission wiring (O.U ~O.U)
CB
8
Power source wiring (I.U)
S
9
Earth wiring (I.U)
Indoor unit side
5
S
CB
ELB
Indoor unit power source
1N~230V 50 Hz
6
8
8
Indoor
Indoor
unit
9
unit
9
6
6
8
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