42
Specification of the protection tube
Name Temper grade Applicable conditions
Flexible PVC conduit PVC
When the protection tube is installed indoor and not exposed
to outside, because it is embedded in concrete structure
Class 1 flexible
conduit
Galvanized steel sheet
When the protection tube is installed indoor but exposed to
outside so there are risk of damage to the protection tube
Class 2 flexible
conduit
Galvanized steel sheet
and Soft PVC compound
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
Caution for perforating the knock-out hole
• Perforate a knock-out hole by punching it with a hammer.
• After perforating the knock-out hole, apply rust resisting paint around the hole.
• 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.
CAUTION
Power wiring diagram
Supplying3phase4wires(380-415V~)
3 phase 4 wires (380 ~ 415 V)
Main outdoor unit
Main outdoor unit
Sub outdoor unit
Sub outdoor unit
Communication cable (Outdoor
unit ~ Outdoor unit)
Main
outdoor unit
Sub outdoor
unit 1
Sub outdoor
unit 2
Communication cable
(Outdoor unit ~ Indoor unit)
Grounding Grounding
Grounding
Wired remote
controller
Wired remote
controller
Wired remote
controller
MCCB+
ELB
or
ELCB
Communication
cable (Outdoor unit
~ Indoor unit )
Communication
cable (Outdoor unit
~ Outdoor unit )
Single phase 2 wires
(220 -240 V)
MCCB+
ELB
or
ELCB
▶ Connect a power cable of the outdoor unit after checking that R-S-T-N (3 phase 4 wire) is properly connected. (If
the380-415VpowerissuppliedtotheNphase,PCBandotherelectricalpartwillbedamaged.)
▶ 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.
10. Installation
To Next Page
Loading...
