3. Wiring
3-1 General Precautions on Wiring
●
Check the rated voltage on the unit's name plate
before wiring according to the wiring diagram.
(Fig. 3-1)
●
Provide a power outlet to be used exclusively for
each unit, with a power supply disconnect and a
circuit breaker for overcurrent protection provided
in the exclusive line.
●
To prevent possible hazards due to insulation
failure, the unit must be grounded.
●
Each wire must be connected firmly.
●
No wire should be allowed to touch refrigerant
tubing, the compressor or any moving parts of fan
motors.
Regulations on wire diameters differ according to
national and local requirements. For field wiring
regulations, please refer to the LOCAL ELECTRICAL
CODES before starting, and carefully follow the
regulations as you do the installation.
●
Do not supply power to the system untill all
wiring and refrigerant tubing connections are
completed and checked.
●
Wiring should only be done by an experienced,
qualified electrician.
Table 2 lists recommended wire lengths and
diameters for power supply systems. Refer to the
Wiring Diagram above for the meaning of "A" and "B"
in Table 2.
Wiring Diagram
This appliance must be
grounded.
Units A, B........ MCAV92/CAV92
Unit C.............. MCAV/KPAV180
5
!
WARNING
# ... AWG (American Wire Gauge)
(A) Power Supply Line Length (m)
(B) Inter Line Length (m)
Fuse or
Cross - Sectional Area
Circuit Capacity
3.5 mm
2
5.5 mm
2
2 mm
2
(# 12)
(# 10)
(# 14)
14 m
22 m
20 m
30 A
WARNING
1
2
4
1
2
(B)
(A)
1
2
4
5
6
8
1
2
4
Unit A
Earth (ground)
Disconnect
swith
(Field supply)
Indoor unit
Outdoor unit
Power supply
220 – 240 V
~50Hz
3
3
3
L
N
Terminal 3P
Terminal 8P
Terminal 5 P
Grounding
Line
3
3
7
3
5
4
1
2
Unit B
3
L
N
4
1
2
Unit C
3
Fig. 3-1
NOTE
Table 2
Supply power wire A:
Multipolar electric wire. Size and length of the suggested electric wire are showed on table “electrical data”. The wire must be
Mod. H05VV-F (according to CEI 20-19 CENELEC HD 22). Make sure the length of the conductors between the fixing point and
the terminals allows the straining of the conductors L, N before that of the grounding.
Connecting wire B (with ground conductor):
Multipolar electric wire; size and length of the suggested electric wire are showed on table “electrical data”. The wires have not
to be lighter than Mod. H07RN-F (according to CEI 20-19 CENELEC HD22).
Connecting wire C (without ground conductor):
Multipolar electric wire; size and length of the suggested electric wire are showed on table “electrical data”. The wires have not
to be lighter than Mod. A07RN-F (according to CEI 20-19 CENELEC HD22).
