– 13 –
Heat insulation process
Apply heat insulation for the pipes separately at liquid
side and gas side.
• For the heat insulation to the pipes at gas side, use
the material with heat-resisting temperature 248 °F
(120 °C) or higher.
• To use the attached heat insulation pipe, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
REQUIREMENT
• Apply the heat 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 heat insulator with its slits facing up (ceiling
side).
• Apply heat insulating materials to both the gas side
and liquid side as shown:
Indoor unit
Union
Wrap the insulator
with adhesive tale.
(locally procured)
Heat insulator
of the pipe
Flare nut
To cover the pipe and the
indoor unit with a heat
insulator, do not make a
gap between them.
Banding band
(Accessory)
7
Electrical connection
WARNING
1.
Use predefined wire and connect them certainly.
Keep the connecting terminal free from external
force.
Improper wire connection or clamping may result in
exothermic, fire or malfunction.
2.
Connect ground wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.
3.
Install appliance in accordance with national
wiring regulations.
Capacity shortage of circuit breaker or incomplete
installation may cause an electric shock or a fire.
CAUTION
• Consult local building codes, NEC (National Electrical
Code) or CEC (Canadian Electrical Code) for special
requirements.
• If incorrect / incomplete wiring is carried out, it will
cause an electrical fire or smoke.
• Install circuit breaker is not tripped by shock waves.
If circuit breaker is not installed, an electric shock may
be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and
inner insulator of power and control wires when
peeling them.
• Use the power cord and control wire of specified
thickness, type, and protective devices required.
• Do not connect 208 / 230 V power to the terminal
blocks (U3, U4, A, B etc.) for control wiring.
(Otherwise, the system will fail.)
• 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 circuit breaker of the indoor unit
until vacuuming of the refrigerant pipes completes.
REQUIREMENT
• For power supply wiring, strictly conform to the Local
Regulation in each country.
• Run the refrigerant piping line and control wiring line in
the same line.
• For wiring of power supply of the outdoor units,
follow the Installation Manual of each outdoor unit.
Indoor / Outdoor connecting
(system interconnection
wires) and control wires
specification
1. Connect the connecting wire to the terminal as
identified with their respective numbers on the
terminal block of indoor and outdoor unit.
(4
x
AWG12)
2. Insulate the unsheathed redundant cords
(conductors) with electrical insulation tape.
Process them so that they do not touch any electrical
or metal parts.
3. For inter-unit wiring, do not use a wire jointed to
another on the way.
*
1
:Length of the system interconnection wires.
*
2
:Case of central control with “1:1” Model Connection
Interface
CAUTION
Use the same size wire for the field power supply wire
and system interconnection wires when the outdoor unit
is RAV-SP180AT2.
NOTE
• Use copper supply wires.
• Use UL wires rated 600 V for the system
interconnection wires.
• Use UL wires rated 300 V for the remote control
wires.
• This indoor unit which has TCC-LINK adapter does
not need “1:1” Model Connection Interface (TCB-
PCNT31TLUL) (sold separately).
(Use terminals (U3, U4) for central control.)
Wire Quantity x size
Indoor unit - Outdoor unit *
1
3 x AWG12 (polar)
Ground
1 x AWG12 or thicker
Remote control
2 x AWG20 (non-polar)
Central control - indoor unit *
2
2 x AWG 16
(shielded wire, Up to
3280’10” (1000 m))
2 x AWG 14
(shielded wire, Up to
6561’8” (2000 m))
RAV-
SP180AT2
SP240AT2
SP300AT2 -
SP420AT2
Wire
length
164’1” (50
m) or less
229’8” (70
m) or less
246’1” (75 m) or
less
25-EN
26-EN
+00EB99810201_01EN.book Page 13 Wednesday, June 1, 2016 2:52 PM
