Commercial Air Conditioning & Heating Units | Lennox ...

Mar 31, 2017 · The power supply to the outdoor unit shall be 208-230 volts, single phase, 60 Hz, or 115 volts, single phase, 60 Hz. Dedicated communication cables will be required by the 3 and 4 ton units. The control wiring to the indoor unit requires 18 gauge, 2 core, stranded, and shielded wire. Unshielded communication wire shall not be accepted. ................
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