Table of Contents
5. Wiring Instructions
5-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring
closely following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each unit, with a power supply disconnect and leakage
breaker/fuse link for overcurrent protection provided in the exclusive line.
(3) To prevent possible hazard due to insulation failure, the unit must be grounded.
(4) Each wiring connection must be done tightly and in accordance with the wiring system diagram. Wrong wiring may
cause the unit to misoperate or become damaged.
(5) Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be
very dangerous. The manufacturer will accept no responsibility for any damage or misoperation that occurs as a
result of such unauthorized changes.
5-2. Recommended Wire Length and Diameter
Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local
electrical codes. Carefully observe these regulations when carrying out the installation.
Table 6 shows maximum wire lengths for control line and power line and fuse or circuit capacity.
NOTE
Refer to the wiring system diagram (Fig. 25) for the meaning of (A), (B) and (C) in Table 6.
Table 6
Cross-Sectional
2
Area (mm
)
Model
CMRV3656
WARNING
G
Be sure to comply with local codes on running
the wire from the indoor unit to the outdoor unit
(size of wire and wiring method, etc.).
G
Each wire must be firmly connected.
G
No wire should be allowed to touch refrigerant
tubing, the compressor, or any moving part.
G
Be sure to connect power wires correctly
matching up numbers on terminals of the
outdoor unit and respective indoor units A – E.
CAUTION
G
Be sure to connect the power supply line to the outdoor unit as
shown in the wiring diagram. The indoor unit draws its power from
the outdoor unit.
G
Do not run wiring for antenna, signal, or power lines of television,
radio, stereo, telephone, security system, or intercom any closer
than 1 meter from the power cable and wires between the indoor
and outdoor units. Electrical noise may affect the operation.
Max. Power Line Length (m)
(A)
3.5
26
Max. Control Line Length (m)
(B) (C)
1.0
30
WARNING
G
To avoid the risk of electric shock, each air
conditioner unit must be grounded.
G
For the installation of a grounding device,
please observe local electrical codes.
G
Grounding is necessary, especially for units
using inverter circuits, in order to release
charged electricity and electrical noise
caused by high tension.
Otherwise, electrical shock may occur.
G
Place a dedicated ground more than 2 meters
away from other grounds and do not have it
shared with other electric appliances.
15
Fuse
or
Circuit Capacity
25 A
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