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Copper Wire Size - AWG
(1% Voltage Drop)
Supply Circuit Supply Wire Length - Ft
Ampacity 50 100 150 200
15 14 10 8 6
20 12 8 6 4
25 10 8 6 4
30 10 6 4 4
35 8 6 4 3
40 8 6 4 2
45 6 4 3 2
50 6 4 3 1
12
The condensing unit rating plate and the tables of "Physical and Electrical Specifications / Outdoor
Units" (Table 1) provide pertinent data necessary for the selection of proper size electrical service
and over-current protection devices.
Table 6 provides data on the minimum copper wire size as a function of supply wire length and circuit
ampacity.
Table 6: Minimum Wire Size Based on N.E.C. for 60 C Type Copper Conductors Below 100
Ampacity.
The owner should be made familiar with the location of the over-current protection, the proper size
for this application and the proper procedure for disconnecting power service to the unit.
The condensing unit control wiring requires a 24 Volt minimum, 25 VA service from the indoor
transformer as shown on the wiring diagram.
7.SYSTEM STARTUP
1.Turn thermostat to "OFF", turn on power supply at disconnect switch.
2.Turn temperature setting as high as it will go.
3.Turn fan switch to "ON". Indoor blower should run. Be sure it is running in the right direction.
4.Turn fan switch to "AUTO". Turn system switch to "COOL" and turn temperature setting below
room temperature. Unit should run in cooling mode.
5.The compressor, indoor blower, and outdoor fan should now be running. Make sure cool air is
supplied by the unit.
6.Turn the fan switch to the "Auto" position. The blower should stop 90 seconds later.
7.Turn system switch to "Heat" and fan switch to "Auto" .
8.Slowly raise the heating temperature setting. The compressor, indoor blower and outdoor fan should
now be running.
9.If unit operates properly on the heating cycle, raise the heating temperature setting high enough.
10.For thermostats with emergency heat switch return to startup.