En-11
(2) After connecting the wires, use cable clips to secure the wires. (Fig. B)
• Connect the wires without applying excessive tension.
Fig. B
INDOOR UNIT POWER
1 2 3 L N
G
G
1 2 3 L1 L2
INDOOR UNIT POWER
Terminal blocks
Connection cable
(indoor unit and
outdoor unit
connection cable)
Terminal nameplate
Power supply cable
(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
(4) Be sure to install the insulation sheet 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
[in. (mm)]
Insulation material
Minimum thickness [in. (mm)]
70%
or more
75%
or more
80%
or more
85%
or more
Pipe
diameter
1/4 (6.35) 5/16 (8) 13/32 (10) 16/32 (13) 21/32 (17)
3/8 (9.52) 11/32 (9) 7/16 (11) 18/32 (14) 23/32 (18)
1/2 (12.70) 13/32 (10) 15/32 (12) 19/32 (15) 3/4 (19)
5/8 (15.88) 13/32 (10) 15/32 (12) 5/8 (16) 25/32 (20)
If the ambient temperature and relative humidity exceed 89 °F (32 °C), increase the level
of heat insulation for the refrigerant pipes.
7.2. Filling with putty
WARNING
Fill the piping 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.
Fig. A
Insulation
Putty
9379069762_IM.indb 11 3/4/2016 09:03:45
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