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5.10.3 Wiring layout
The wiring layout comprises the power cords and communication wiring between the indoor and outdoor units. These include
the earth lines, and the shielded layer of the earth lines of the indoor units in the communication line. See below the wiring
layout of outdoor unit.
Tie
wire
Tie wire
Communication
Power cord
wiring
NOTE
Power cords and communication wiring must
be laid out separately, they cannot be placed
in the same conduit. Use a power supply
conduit to isolate if the current of the power
supply is less than 10 A. If the current is
greater than 10 A but less than 50 A, the
spacing must exceed 500 mm at all times.
Otherwise, it may lead to electromagnetic
interference.
Arrange the refrigerant piping, power cords
and communication wiring in parallel, but do
not tie the communication lines together with
the refrigerant piping or power cords.
Power cords and communication wiring
should not come in contact with the internal
piping so as to prevent the high temperature
piping from damaging the wires.
5.10.3 Connecting the power cord
NOTE
Do not connect the power supply to the
communication terminal block. Otherwise,
the whole system may fail.
You must first connect the earth line (note
that you should use only the yellow-green
wire to connect to earth, and you must turn off
the power supply when you are connecting
the earth line) before you connect the power
cord. Before you install the screws, you must
first comb through the path along the wiring
to prevent any part of the wiring from
becoming
exceptionally
because the lengths of the power cord and
earth line are not consistent.
loose
or
tight
36
X Y E P Q E
PQE
Controller
IDU Comm.
Communication terminal
Power supply terminal
Power cable hole
Communication cable hole
NOTE
The wire diameter must comply with the
specified specification, and make sure the
terminal is screwed tight. At the same time,
do not subject the terminal to any external
force.
Do tighten the terminal with an appropriate
screwdriver. Screwdrivers that are too small
may damage the terminal head, and cannot
tighten it.
Excessive tightening of the terminal may
cause the screw thread to deform and slip,
making
it
impossible
components securely.
Only use a ring terminal to connect the power
cord. Non-standard cable connection will
lead to poor contact which may in turn cause
exceptional heating and burning. The figure
below demonstrates both the correct and
wrong connections.
1. Use round-type terminals of the correct specifications
to connect the power cable.
WARNING
When inserting the strong-current cables and
communication lines into the wiring holes,
they must be equipped with wiring across
rings to avoid being worn.
O A
Energy Meter
Fig. 5.47
to
connect
the
Fig 5.48
V.1
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