7
5. Electrical work
Fig. 5-
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System
<For cooling only models>
<For heat pump models>
Simultaneous twin system
<For heat pump models>
<For cooling only models>
Set the DIP switch (SW5-3) of the indoor unit control board.
Set the DIP switch (SW5-3) of the indoor unit control board.
Connect the power line, and control line. (Fig. 5-2)
► Fix power source wiring to control box using buffer bushing for tensile
force. (PG connection or the like.)
• Since the electric box may need to be pulled out for servicing or other occasions,
wires must have enough slack.
• Class 3 grounding work must be conducted (grounding wire diameter: 1.5 mm or
more).
After wiring is completed, reinstall the parts in the reverse order of removal.
Warning:
Wiring should be done so that the power lines are not subject to tension.
Otherwise, heat may be generated or fire may occur.
Terminal block for control lines from the outdoor unit
Terminal block for power supply
Power supply wiring & connection wiring
Cord clamp
Outdoor unit power supply
Earth leakage breaker
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit <For heat pump models>
Indoor unit <For cooling only models>
Indoor unit power supply
Outdoor unit power supply
Earth leakage breaker
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Main indoor unit <For heat pump models>
Sub indoor unit <For heat pump models>
Indoor unit power supply
Main indoor unit <For cooling only models>
Sub indoor unit <For cooling only models>
When setting the sub indoor unit, set the
DIP switch (SW5-3) of the indoor unit con-
trol board to ON.
Indoor unit model
PK
PKH
Indoor unit power supply (Heater)
~N (single), 50 Hz, 220 - 240 V/60 Hz, 220 V
Indoor unit input capacity (Heater)
Main switch/Fuse
16 A/16 A
16 A/16 A
(16 A/16 A)
Wiring
wire No.× size
(mm
2
)
Indoor unit power supply (heater)
2 × Min. 1.5 mm
2
Indoor unit power supply (heater) earth
1 × Min. 1.5 mm
2
Indoor unit-Outdoor unit
*1
2 × Min. 0.3 mm
2
3 × Min. 0.3 mm
2
Indoor unit-Outdoor unit earth
–
–
Remote controller-Indoor unit
*2
2 × Min. 0.3 mm
2
(Non-Polar)
2 × Min. 0.3 mm
2
(Non-Polar)
Circuit
rating
Indoor unit (Heater) L-N
AC220 - 240 V
AC220 - 240 V
Indoor unit-Outdoor unit 1-2
DC12 V
DC12 V
Indoor unit-Outdoor unit 1-3
–
DC12 V
Remote controller-Indoor unit
DC12 V
DC12 V
*1 Max.50m
*2 The 10m wire is attached in the remote controller accessory. Max. 500m
Note:
1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and Indoor/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC57)
3. Install an earth longer than other cables.
4. For the outdoor unit,the transformer connection must be selected depending on the power supply voltage, 220/230 V or 240 V. (For heat pump models)
5. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV).
SW5
Main indoor
Sub indoor
SW5-1: ON
SW5-2: OFF
SW5-3: OFF
SW5-1: ON
SW5-2: OFF
SW5-3: ON
SW5
Main indoor
Sub indoor
SW5-1: ON
SW5-2: ON
SW5-3: OFF
SW5-1: ON
SW5-2: ON
SW5-3: ON
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