41
Control wiring
(C) Inter-unit (between outdoor and
indoor units) control wiring
(D) Remote control wiring
(E) Control wiring for group control
0.75 mm
2
(AWG #18)
0.75 mm
2
(AWG #18)
0.75 mm
2
(AWG #18)
Use shielded wiring*
Use shielded wiring
Use shielded wiring
Max. 1,000 m
Max. 500 m
Max. 500 m (Total)
5. ELECTRICAL WIRING
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, and a power supply disconnect and cir-
cuit breaker for overcurrent protection should be
provided in the exclusive line.
(3) To prevent possible hazards from insulation fail-
ure, the unit must be grounded.
(4) Each wiring connection must be done in accor-
dance 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.
(7) Regulations on wire diameters differ from locality
to locality. For field wiring rules, please refer to
your LOCAL ELECTRICAL CODES before begin-
ning.
You must ensure that installation complies with all
relevant rules and regulations.
(8) To prevent malfunction of the air conditioner
caused by electrical noise, care must be taken
when wiring as follows:
●
The remote control wiring and the inter-unit control
wiring should be wired apart from the inter-unit
power wiring.
●
Use shielded wires for inter-unit control wiring
between units and ground the shield on both sides.
(9) If the power supply cord of this appliance is dam-
aged, it must be replaced by a repair shop
appointed by the manufacture, because special
purpose tools are required.
5-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
(A) Power supply
Wire size
Max. length
GRFP255L, GRFP255R
24 m
30 A
GRFP365L, GRFP365R
22 m
40 A
GRFP485L, GRFP485R
20 m
50 A
4 mm
4 mm
4 mm
2
2
2
Time delay fuse or
circuit capacity
NOTE
* With ring-type wire terminal.
Indoor unit
Time delay fuse or
circuit capacity
(B) Power supply
2.5 mm
2
MAFP
CAFP, SPAFP, DSAFP
Type
Max. 150 m
Max. 130 m
10 A
10 A
04-393 DC INV Tech p a-44 12/15/04 3:05 PM Page 41
