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10. Installation
Specification of the protection tube
Name
Flexible PVC conduit
Class 1 flexible
conduit
Class 2 flexible
conduit
Caution for perforating the knock-out hole
ꞏ Perforate a knock-out hole by punching it with a hammer.
CAUTION
ꞏ After perforating the knock-out hole, apply rust resisting paint around the hole.
ꞏ When you need to pass the cables through the knock-out hole, remove burrs on the hole and protection the
cable with a protection tape or bushing etc.
Power wiring diagram
Supplying 3 phase 4 wires (380-415 V~)
Main outdoor
Single phase 2 wires
(220 -240 V)
MCCB+
ELB
or
ELCB
Wired remote
▶ Connect a power cable of the outdoor unit after checking that R-S-T-N (3 phase 4 wire) is properly connected. (If the
380-415 V power is supplied to the N phase, PCB and other electrical part will be damaged.)
▶ Communication cable between indoor and outdoor units and communication cable between outdoor units has no
polarity.
▶ Arrange the cables with a cable tie.
※ ELCB and ELB must be installed since there is risk of electric shock or fire when they are not installed.
42
Temper grade
PVC
Galvanized steel sheet
Galvanized steel sheet
and Soft PVC compound
Sub outdoor
Sub outdoor
unit
unit 1
Communication cable
(Outdoor unit ~ Outdoor unit)
Communication cable
(Outdoor unit ~ Indoor unit)
Grounding Grounding Grounding
Wired remote
Wired remote
controller
controller
controller
When the protection tube is installed indoor and not
exposed to outside, because it is embedded in concrete
structure
When the protection tube is installed indoor but exposed to
outside so there are risk of damage to the protection tube
When the protection tube is installed outdoor and exposed
to outside so there are risk of damage to the protection
tube and extra waterproof is needed
3 phase 4 wires (380 ~ 415 V)
MCCB+
unit 2
ELB
or
ELCB
Main outdoor unit
Main outdoor unit Sub outdoor unit
Communication
cable (Outdoor unit
~ Indoor unit )
Applicable conditions
Sub outdoor unit
Communication
cable (Outdoor unit
~ Outdoor unit )
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