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IM 796
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.
See Figure 13
for typical
clamp.
•
See Table 4, Figure 12 and Figure 14
for the number of
wires, wire gage and fuse/circuit breaker size required.
Table 4: Wire and Fuse/Breaker Requirements
* Not including the Outdoor Coil Sensor Cable.
Figure 12. Cooling Unit Only
Figure 13. Terminal Block and Wire Clamp
Figure 14. Heat Pump Unit
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
10
15
20 / 25
Voltage - 1Ph/60Hz
115V & 208/
230V
115V
208V-230V 208V-230V
Power supply wire size
Number of wires
12 ga.
2 + gnd.
12 ga.
2 + gnd.
12 ga.
2 + gnd.
12 ga.
2 + gnd.
Connecting wire size
Number of wires - A/C
Number of wires - HP
12 ga.
2 + gnd.
4 + gnd.*
12 ga.
2 + gnd.
4 + gnd.*
12 ga.
2 + gnd.
4 + gnd.*
12 ga.
2 + gnd.
4 + gnd.*
Fuse/Breaker size
15 amp
20 amp
15 amp
20 amp
Connecting Wires
Outdoor Unit
Terminal Block
Indoor Unit
Terminal Block
Power Supply
L
1
L
2
Outdoor coil sensor, 2 conductor cable,
(26 feet long) shipped with the indoor unit.
Extend with 22 ga. low voltage wire if not
long enough to read outdoor unit.
!
NEC requires an approved electrical
disconnect within sight of the unit so
that anyone working on the unit can
turn the power off and see that it’s
not accidently turned back on. This
will require two disconnects, one by
the outdoor unit and one by the indoor
unit.