16
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 elec-
trical codes. Carefully observe these regulations when carry-
ing out the installation.
Table 7 shows maximum wire lengths for control line and
power line and fuse or circuit capacity.
Refer to the wiring system diagram (Fig. 26a and b) for the
meaning of “A” and “B” in Table 7.
Table 7
NOTE
Cross-sectional
Max. Control Line Length
Max. Power Line Length
Fuse
Area (mm
2
)
(A)
(B)
or
Model
1.0
2.0
2.6
3.5
Circuit Capacity
GRF194/244MR5IAA 34 m 15 m 20 m 26 m 20 A
Indoor Unit
Outdoor Unit
Unit A
Unit A
Unit B
Unit B
(A)
Terminal plate (8P)
Terminal plate (3P)
Grounding line
Power supply
Single-phase
AC 220 – 240 V
(B)
CAUTION
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.
5-3. Wiring System Diagram
WARNING
●
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.).
●
Each wire must be firmly connected.
●
No wire should be allowed to touch refrigerant
tubing, the compressor, or any moving part.
●
Be sure to connect power wires correctly match-
ing up numbers on terminals of the outdoor unit
and respective indoor units A – C.
To avoid the risk of electric
shock, each air conditioner
unit must be grounded.
WARNING
Fig. 26a
Fig. 26b
Indoor Unit
Outdoor Unit
Unit A
Unit A
Unit B
Unit C
Unit B
Unit C
(A)
Terminal plate (12P)
Terminal plate (3P)
Grounding line
Power supply
Single-phase AC 220 – 240 V
(B)
2 indoor units with GRF194MR5IAA
3 indoor units with GRF244MR5IAA
