Insulation process
Apply insulation for the pipes separately at liquid side and gas side.
• For the insulation to the pipes at gas side, be sure to use the material with heat-resisting temperature
248 °F (120 °C) or higher.
• To use the attached insulation pipe, apply the insulation to the pipe connecting section of the indoor unit
securely without gap.
REQUIREMENT
• Apply the insulation to the pipe connecting section of the indoor unit securely up to the root without exposure of
the pipe. (The pipe exposed to the outside causes water leak.)
• Wrap insulation with its slits facing up (ceiling side).
Wrap the pipe with the attached insulation
without any gap between the indoor unit.
The seam must be faced upward
(ceiling side).
Insulation pipe
(accessory)
Banding band
(locally
procured)
Insulation
of the pipe
Union
Flare nut
Indoor unit
8
Electrical connection
WARNING
•
Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces
applied to the terminals from affecting the terminals.
Incomplete connection or fixation may cause a fire or other trouble.
•
Connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
•
Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
CAUTION
• For power supply specifications, follow the Installation Manual of outdoor unit.
• Do not connect 208/230V~60 Hz power to the terminal blocks (
A
,
B
) for control wiring.
Otherwise, the system will fail.
• Do not damage or scratch the conductive core and inner insulator of power and system interconnection wires
duringpeeling them.
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
System interconnection wires specifications
System
interconnection
wires*
AWG16 or more
(H07RN-F or 60245 IEC 66)
Up to
229'7"
(70 m)
*Number of wire x wire size
Remote controller wiring
Remote controller wiring, remote controller inter-unit
wiring
Wire size: AWG20 to AWG16
Total wire length of remote controller wiring and remote
controller inter-unit wiring = L + L1 + L2 + … Ln
In case of wired type only
Up to 1640' 5" (500 m)
In case of wireless type
included
Up to 1312' 4" (400 m)
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln
Up to 656' 2" (200 m)
CAUTION
The remote controller wire and system interconnection wires cannot be parallel to contact each other and cannot
be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or other
factor.
Remote
controller
wiring
L
L1
L2
Ln
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Remote
controller
Remote controller inter-unit wiring
(Max. 8 units)
– 18 –
EN
35-EN
36-EN
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