22
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 match-
ing up numbers on terminals of the outdoor unit
and respective indoor units A – D.
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, secu-
rity system, or intercom any closer than 3'4" (1 m)
from the power cable and wires between the
indoor and outdoor units. Electrical noise may
affect the operation.
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 7' (2 m) away
from other grounds and do not have it shared with
other electric appliances.
WARNING
Fig. 25a
Fig. 25b
4 indoor units with CM2472/CLM2472, CM3172/CLM3172
1
2
3
T
e
rminal
INDOOR UNIT
1
2
3
INDOOR UNIT
1
2
3
1
UNIT B
2
3
4
UNIT C
5
6
7
8
9
1
2
T
e
rminal
T
e
rminal
L1
L2
INDOOR UNIT
UNIT A
(A)
(B)
(C)
Terminal
(2P)
Terminal(9P)
OUTDOOR UNIT
Disconnect
switch
230/208V
230/208V
230/208V
230/208V
230/208V
230/208V
230/208V
230/208V
230/208V
Grounding
line
Grounding
line
Disconnect
switch
Field supply
Disconnect
switch
Field supply
Field supply
P
o
w
er supply
Single-phase 230/208V
A
C 60HZ
Grounding
line
Grounding line
(A)
(B)
(B)
(B)
(B)
(B)
(B)
(C)
(C)
(C)
1
2
3
T
erminal
1
UNIT
B
2
3
4
UNIT
C
5
6
7
UNIT
D
8
9
10
11
12
1
2
L1
L2
INDOOR UNIT
UNIT
A
(A)
1
2
3
T
erminal
INDOOR UNIT
(B)
T
erminal
(2P
)
Terminal(12P)
OUTDOOR UNIT
Disconnect
switch
230/208V
230/208V
230/208V
230/208V
230/208V
230/208V
Grounding line
Grounding line
Field supply
230/208V
230/208V
230/208V
230/208V
1
2
3
T
erminal
INDOOR UNIT
(C)
1
2
3
T
erminal
INDOOR UNIT
(D)
(Inter-unit)
power line
230/208V
230/208V
Power supply
Single-phase 230/208V
A
C 60HZ
Grounding line
Grounding
line
Grounding
line
Disconnect switch
Field supply
Disconnect
switch
Field supply
Disconnect switch
Field supply
(A)
(B)
(B)
(B)
(B)
(B)
(B)
(B)
(B)
(C)
(C)
(C)
(C)
3 indoor units with CM1972/CLM1972
5-3. Wiring System Diagram
*
*
Disconnect switch may be required by national
or local codes.
NOTE
Always comply with national and local code
requirements.
CAUTION
*
*
*
*
*
*
07-156 CM-CLM1972-3172 6/6/07 9:35 AM Page 22
