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Electrical Wiring
NOTES:
(1) Do not lead the power supply wiring and transmission wiring through the same conduit. Moreover, keep a distance of at
least 1-31/32(50mm) between the power supply wiring and transmission wiring.
(2) Cut cross line at rubber bush and securely attach it to the knock-out hole for cable protection.
(3) Attach the guard plate to avoid entrance of rats or other small animals into the unit.
(4) Avoid the wirings from touching the refrigerant pipes, plate edges and electrical parts inside the unit.
(5) Completely seal the end of conduit tube with sealing materials to avoid the ingress of rain into the conduit. Make a drain
hole at the lowest part of the conduit tube.
Tightly secure the power source wiring by using the cord clamp inside the unit.
Electrical Wiring Connection of The System
(1) Connect power supply wiring to each outdoor unit. Connect an ELB, fuse and main switch (S) to each outdoor unit.
(2) Connect power supply wiring to each indoor unit to be connected to the same outdoor unit. Connect an ELB, fuse and
main switch(S) to each indoor unit group.
(3) Connect the transmission wiring between indoor units and outdoor units, as shown in gure.
(4) Connect the transmission wiring in the same refrigerant cycle. (In case that the refrigerant pipe of indoor unit is
connected to the outdoor unit, connect the transmission wiring to the same indoor unit.) Connecting the refrigerant pipe
and transmission wiring to the systems of dierent refrigerant cycle may lead to malfunction.
(5) Use 2-core lead wires such as shielded twist pair cable for the transmission wiring. (Do not use 3-core or over.)
(6) Use the same kind of cables for the H-NET system of the same refrigerant cycle.
(7) The transmission wiring is required to be separated from the power supply wiring. Keep a distance of at least 1-31/32in.
(50mm) between the transmission wiring and the power supply wiring, and also a distance of min. 49.2ft.(5m) between
the transmission wiring and power supply wiring of other electrical device. If the above is not secured, put the power
supply wiring into the metal conduit to separate from other wirings.
(8) Connect the following transmission wiring to Terminal 1 and 2 of TB2 in the outdoor unit A (main unit).
● between outdoor unit and indoor unit
● between outdoor unit and indoor unit in other refrigerant cycles
(9) Do not connect the power supply wiring to terminal block for transmission wiring (TB2). Printed circuit board may be
damaged.
(10) Connect the earth wire for outdoor/indoor units. The earth wiring work under the condition of 100 Ω (max.) ground
resistance should be performed by a qualied person.
NOTES:
(1) For the combination modules (216~456kBtu/h), DSW settings of Main and Sub are required.
(2) Alarm occurs if the transmission wires between outdoor units are connected to Terminal 1 and 2 for H-NET.
(3) In case that alarm is indicated on the LCD of Main outdoor unit, follow the “7-segment” display when the Main outdoor
unit checking.
(4) Perform function setting from main outdoor unit.
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