46
NOTE:
1. Do not put the power and communication cables in
the same cable conduit. In addition, keep a distance
of at least 5 cm between the power wires and
communication wires.
2.
Put the cable through the rubber rings and fix it to the
entrance hole to protect the cable.
3. Avoid the wires to touch the pipes, metal sheet edges,
and electrical components inside the unit.
4. Use sealing material to completely seal cable conduit
to prevent rain water entering cable conduit.
Power wire
Communication
wire
Communication
wire
Cable conduit
CAUTION
!
Tighten the power wire with a clamp in the unit.
7.4 Electrical Wiring for Indoor and Outdoor Unit
(1) Connect the power cable to each of the outdoor unit. Each of the outdoor unit connection should
consist of a ELB (Earth Leakage Breaker), circuit breaker, and the main switch (S).
(2) Connect the power wire to each group of the indoor units. Indoor units refer to all the indoor units
connected to the same outdoor unit. Each group of indoor units is connected with a earth leakage
breaker, circuit breaker and the main switch (S).
(3) As shown in Figure 7.2, connect the communication cable between indoor and outdoor unit.
(4) Connect the communication wire between the units in the same refrigerant system (connect the
communication cable to the same indoor unit in the case where the refrigerant pipe of the indoor
unit is connected to the outdoor unit). If you connect the refrigerant pipe and communication wires
to different refrigerant circulation system, malfunction may be caused.
(5) Use 2-core cable communication wire such as shielded twisted pair. (Do not use 3-core or 3 more
core wire).
(6) Use the same specifications provided in the H-LINK system of the same refrigerant system.
(7) Separate the communication wire from the power cable. Maintain at least 5cm spacing between the
communication wire and the power wire. Maintain at least 1.5m spacing between the communication
wire and other electrical devices. If not, place the power wire in a metal conduit to isolate it from
other wires.
(8) Connect the following communication wires to terminals 1 and 2 of the terminal block TB2 of the
outdoor unit A (main unit):
●
Between the outdoor unit and indoor unit
●
Between outdoor unit and indoor unit of other refrigerant system
(9) Do not connect the power wire to the communication terminal block TB2. This may damage the
printed circuit board.
(10) Connect GRD wire to the outdoor/indoor unit. GRD wire with grounding resistance of 100Ω (Max)
should be connected by qualified personnel.
(11) Communication wires between the outdoor units within the same refrigerant system will be
connected to the terminal 3 and 4 of the terminal block TB2.
