Wiring Work
Power and communication cable connection
1. Before wiring work, you must turn off all power source.
2. Indoor unit power should be supplied through the breaker (MCCB: Molded Case Circuit Breaker, ELB: Earth Leakage
Breaker, ELCB: Earth Leakage Circuit Breaker) separated by the outdoor power.
MCCB: overcurrent protection
ELB: earth leakage protection
ELCB: overcurrent prot earth leakage protection
3. The power cable should only use copper wires.
4. Connect the power cable {1(L), 2(N)} among the units and communication cables (F1, F2). The maximum length of cables
shall be 1000m.
5. When installing the wired remote control, connect F3 and F4 (for communication).
(Indoor PBA will be damaged if V1, V2, F3, F4 are shorted out.)
6. Installation conditions for a wired remote controller
f
A fresh duct and an indoor unit should not be installed by one wired remote controller.
f
The fresh duct has a different operation mode, temperature setting, etc. Therefore, if fresh ducts and indoor units, they
should not share a wired remote controller. Make sure to install wired remote controller separately for fresh ducts and
indoor units.
f
Installation between fresh ducts can be controlled by one wired remote controller.
Example of correct installation
Installation between fresh ducts
Fresh Duct 1
Fresh Duct 2
Fresh Duct 3
Wired remote controller
220 V - 240 V~
ELB
MCCB
ELCB
MCCB
or
❋
ELCB : Essential installation.
Outdoor unit
• Power off before connecting any wire. Indoor PBA will be damaged if V1, V2, F3, F4 are shorted out.
WARNING
• Installation between fresh ducts can be controlled by one wired remote controller.
NOTE
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