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ELECTRICAL WIRING
•
Do not allow cables to come into contact with the refrigerant pipes,
metal edges, printed circuit boards (PCB) or the electric components
inside the unit; the cables may be damaged and this could result in
fire.
•
Connecting the operating line cables incorrectly may lead to faults
in the PCB.
•
Firmly secure the cables inside the outdoor unit with plastic flanges.
•
Check to ensure that screws for terminal block are tightly tightened.
•
Secure the cable of the remote control switch with the cord clamp
inside the electrical box.
?
N O T E
•
Use twist pair wire (more than 0.75 mm²) for operation wiring between
outdoor unit and indoor unit, and operation wiring between indoor unit
and indoor unit.(Do not use wire with more than 3 cores).
•
H-LINK twist pair shielded cable must be grounded in the outdoor
unit side.
11.2 CONNECTION OF THE POWER SUPPLY CIRCUITS
Supply the power sources to each outdoor unit and indoor unit respectively. Power source wiring is fundamentally according to this
method (as example).
11.2.1 Power source wiring
Heat pump system
Power source from the outdoor unit to the indoor unit
4
1
2
3
6
1
ELB (Earth leakage breaker)
2
CB (Circuit breaker)
3
S (Main switch)
4
Outdoor unit
33
PMML0511 rev.1 - 06/2019
5
7
6
8
8
5
Operation wiring (O.U
I.U )
~
6
Indoor unit
7
Remote control wire (I.U)
8
Remote control (I.U)
•
Use shielded wires for intermediate wiring to protect the units from
noise obstacle at length of less than 300 m and size complied with
local code.
•
Sometimes, the refrigeration/heating system is not able to operate
correctly in cases when the system is supplied from the same
supply line as other major consumers (heavy machinery, power
inverter systems, cranes, welding machinery, etc). Also when the
supply cables of the major consumers and the system are very close
together, induction in the wiring may arise due to a rapid change in
the electricity consumption of the above consumers and their start-up.
The power supply line of the unit must have an exclusive power
control switch and a certified protective circuit breaker. All the
electric components in the installation (main power switches,
circuit breakers, earth leakage breakers, wiring, connectors and
connector terminals) must have been selected and installed
correctly in line with the electrical data provided in this manual,
and must comply with the applicable local regulations, codes
and standards.
Independent power source of outdoor unit and indoor unit
1
2
3
1
2
3
7
1
ELB (Earth leakage breaker)
2
CB (Circuit breaker)
3
S (Main switch)
4
Outdoor unit
5
Operation wiring (O.U
4
5
6
6
7
7
8
9
6
Distribution box (field-supplied)
7
Indoor unit
8
Remote control wire (I.U)
9
Remote control (I.U)
I.U )
~
8
9
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