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(3) Secure the cables using the cable clips under the terminal blocks, and then secure
the cables using the cable clips attached to the base of the valves.
Cable clip
Binder
(Accessory)
(4) Be sure to install the terminal cover after the wiring is complete.
7. PIPE INSTALLATION-2
WARNING
Install the insulated pipes so that they do not touch the compressor.
7.1. Installing insulation
Use an insulation on the refrigerant pipes to prevent condensation and dripping.
•
(Fig. A)
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
6.35 (1/4)
8
10
13
17
9.52 (3/8)
9
11
14
18
12.70 (1/2)
10
12
15
19
15.88 (5/8)
10
12
16
20
19.05 (3/4)
10
13
16
21
If the ambient temperature and relative humidity exceed 32 °C, increase the level of
•
heat insulation for the refrigerant pipes.
7.2. Filling with putty
WARNING
Fill the piping holes and wiring holes with putty (supplied locally) to avoid any gap
(Fig. A). If small animals such as insects enter the external unit, a short circuit may be
caused near electrical components in the service panel.
If the outdoor unit is installed at a level that is higher than the indoor unit, the water
•
that has condensed in the 3-way valve of the outdoor unit could travel to the indoor
unit. Therefore, use putty in the space between the pipe and the insulation to prevent
the entry of water to the indoor units.
Fig. A
Insulation
Putty
Cable
8. HOW TO OPERATE DISPLAY UNIT
8.1. Display unit position
WARNING
Never touch electrical components such as the terminal blocks except the button on
the display board. It may cause a serious accident such as electric shock.
CAUTION
Once refrigerant charging is completed, be sure to open the valve prior to performing
the local settings. Otherwise, the compressor may fail.
Discharge any static electricity from your body before touching the push buttons.
Never touch any terminal or pattern of any parts on the control board.
The positions of the buttons on the outdoor unit control board are shown in the figure
•
below.
Various settings can be adjusted by changing Push buttons on the board of the outdoor
•
unit.
Push buttons
LED display
The printed characters for the LED display are shown below.
•
LED display part
Button part
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