Electrical Connections - Daikin IM-820 Installation And Maintenance Manual

Electrical Connections

Improper installation can cause severe personal injury
o r death . Wi rin g mu st b e d one by a qual ifi ed
technician in compliance with local codes.
• 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 outdoor unit as shown in
wire diagrams for unit sizes 30, 40, and 50.
• See Table 5, and 6 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.
IM 820
WARNING
Table 5: Wire, Fuse/Breaker Requirements - Cooling
Only
Unit Size 20
Voltage - 60Hz. 1 Ph.
Power supply wire size 12 ga.
No. of 12 ga. wires
2 + gnd.
between units
Fuse/Breaker size 20 amp.
Table 6: Wire, Fuse/Breaker Requirements - Heat
Pump Only
Unit Size 20
Voltage - 60Hz. 1 Ph.
Power supply wire size 12 ga.
No. of 12 ga. wires
4 + gnd.
between units*
Fuse/Breaker size 20 amp.
* Not including the low voltage OD coil sensor cable.
25 30 40
208/230
10 ga. 8 ga. 8 ga. 6 ga.
2 + gnd 3 + gnd 3 + gnd 3 + gnd
25 amp. 35 amp. 40 amp. 55 amp.
25 30 40
208/230
10 ga. 8 ga. 8 ga. 6 ga.
4 + gnd 6 + gnd 6 + gnd 6 + gnd
25 amp. 35 amp. 40 amp. 55 amp.
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