IM 818
Page 9
Electrical Connections
•
Wiring must be in accordance with all applicable electri-
cal codes.
•
Wires must not touch the refrigerant piping, compressor
or any moving part.
•
All electrical field wiring must be clamped at both the
indoor unit and the outdoor unit.
Note:
Field install 10A fuse in blue wire of outdoor unit as
shown in wire diagrams for unit sizes 30, 40, and 50.
•
See Table 4 and 5 for the number of wires, wire gage and
fuse/circuit breaker size required.
•
NEC requires an approved electrical disconnect within
sight of the unit so that anyone working on the unit can
turn off the power and see that its not accidently turned
back on. This will require two disconnects, one by the
outdoor unit and one by the indoor unit.
Table 4: Wire, Fuse/Breaker Requirements - Cooling
Only
Table 5: Wire, Fuse/Breaker Requirements - Heat
Pump Only
* Not including the low voltage OD coil sensor cable.
WARNING
Improper installation can cause severe personal injury
or death. Wiring must be done by a qualified
technician in compliance with local codes.
Unit Size
20
25
30
40
50
Voltage - 60Hz. 1 Ph.
208/230
Power supply wire size
12 ga.
10 ga.
8 ga.
8 ga.
6 ga.
No. of 12 ga. wires
between units
2 + gnd.
2 + gnd
3 + gnd
3 + gnd
3 + gnd
Fuse/Breaker size
20 amp.
25 amp.
35 amp.
40 amp.
55 amp.
Unit Size
20
25
30
40
50
Voltage - 60Hz. 1 Ph.
208/230
Power supply wire size
12 ga.
10 ga.
8 ga.
8 ga.
6 ga.
No. of 12 ga. wires
between units*
5 + gnd.
5 + gnd
6 + gnd
6 + gnd
6 + gnd
Fuse/Breaker size
20 amp.
25 amp.
35 amp.
40 amp.
55 amp.
