Sanyo CM1972 Technical & Service Manual page 84

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.
5-3. Wiring System Diagram
3 indoor units with CM1972/CLM1972
*
Disconnect
switch
Field supply
230/208V
1
230/208V
2
(A)
230/208V
3
(C)
Grounding
line
* Disconnect
Field supply
switch
230/208V
1
230/208V
2
(B)
230/208V
3
(C)
Grounding
* Disconnect
switch
Field supply
(B)
1
2
(C)
230/208V
3
(C)
Grounding
line
Fig. 25a
OUTDOOR UNIT
Terminal ( 9P )
(B)
1
2
3
(B)
(B)
4
5
6
(B)
line
7
230/208V
8
230/208V
9
(B)
1
Terminal
(2P)
2
(A)
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 7' (2 m) away
from other grounds and do not have it shared with
other electric appliances.
NOTE
*
Disconnect switch may be required by national
or local codes.
CAUTION
Always comply with national and local code
requirements.
4 indoor units with CM2472/CLM2472, CM3172/CLM3172
* Disconnect
switch
Field supply
1
2
(A) (C)
3
Grounding line
* Disconnect
switch
Field supply
1
2
(B) (C)
3
Grounding line
* Disconnect switch
(Inter-unit)
power line
1
230/208V
2
230/208V
(C)
(C)
3
230/208V
Grounding
line
*
Disconnect switch
Field supply
1
230/208V
2
(D)
230/208V
3
(C)
Grounding
line
22
230/208V
OUTDOOR UNIT
230/208V Terminal ( 12P )
(B)
230/208V
1
2
3
(B)
(B)
230/208V
4
230/208V
5
230/208V
6
(B)
Field supply
(B)
7
8
9
(B)
230/208V
10
11
(B)
12
1
2
(B)
(A)
Fig. 25b