En-9
6.3.3. Wiring procedure
CAUTION
When connecting the power supply cable, make sure that the phase of the power
supply matches with the phase of the terminal board. If the phases do not match, the
compressor will rotate in reverse and will not be able to compress.
(1) Service cover removal
• Remove the two mounting screws.
• Remove the service cover by pushing downwards.
Direction of the
service cover
removal
Hook (3 places)
Service cover
(2) Valve cover removal.
• Remove the one mounting screw.
• Remove the valve cover by sliding upward.
Hook (4 places)
Valve cover
(3) Connect the power supply cable and the connection cable to terminal.
(4) Fasten the power supply cable and connection cable with cable clamp.
Terminal blocks
Firmly secure
cable clamp so
wire terminations
will not receive
external stress.
Use the specied
wire type and
connect it securely.
Cable clamp
Cable clamp
Control box
Connection cable
Power supply cable
Indoor
unit
EARTH
(5) Power supply cable and connection cable should be xed with cable clip as shown in
the gure.
Fill in a gap at the entrance of the cables with insulation (seal).
Cable clip
Power supply cable and connection cable
Insulation
(Seal)
CAUTION
Fix cables so that cables do not make contact with the pipes (especially on high
pressure side).
Do not make power supply cable and connection cable come in contact with valve
(Gas).
Power supply cable
and connection cable
Valve
(Gas)
Gap
(6) Put the service cover and valve cover back after completion of the work.
7. PIPE INSTALLATION-2
Installing insulation
Determine the thickness of the insulation material by referring to Table A.•
Table A, Selection of insulation
(for using an insulation material with equal heat transmission rate or below
0.040 W/(m·k))
Relative humidity
[mm (in.)]
Insulation material
Minimum thickness [mm]
70%
or more
75%
or more
80%
or more
85%
or more
Pipe diameter
9.52 (3/8) 9 11 14 18
15.88 (5/8) 10 12 16 20
If the ambient temperature and relative humidity exceed 32 °C, increase the level of •
heat insulation for the refrigerant pipes.
8. TEST RUN
CAUTION
Always turn on the power 12 hours prior to the start of the operation in order to ensure
compressor protection.
Make a TEST RUN in accordance with the installation instruction sheet for the indoor unit.