That brown sheathed low voltage wire from the air handler to the ac unit outside tells the contractor when to engage.
Low voltage wiring ac unit.
Wiring low voltage wiring 230208v 1 phase and 3 phase are equipped with dual primary voltage transformers.
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Moreover the heat source for a basic ac system can include heat strips for electric heat or even a hot water coil inside the.
This allows the high voltage to pass from one side of the contractor to the other flowing on to the compressor and condenser fan motor.
The low voltage wire set will have two individual wire strands inside of an outer plastic sheathing.
Low voltage is supplied by batteries or by a transformer that converts line voltage to a low voltage.
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Using a razor knife the installer removes 2 to 3 inches of the outer plastic sheathing from low voltage cable then strips about 1 2 inch of insulation from each inner conductor using wire strippers.
Low voltage is normally used for doorbells garage door opener controls heating and cooling thermostats alarm system sensors and controls outdoor ground lighting household and automobile batteries.
Protecting the low voltage wires to the ac.
Common low voltages are 12v 24v and 48v.
Note some ac systems will have a blue wire with a pink stripe in place of the yellow or y wire.
How to wire an air conditioner for control 5 wires the diagram below includes the typical control wiring for a conventional central air conditioning system furthermore it includes a thermostat a condenser and an air handler with a heat source.
Wiring an air conditioner condenser requires both high voltage and low voltage connections and is a job best left to a professional.
This diagram is to be used as reference for the low voltage control wiring of your heating and ac system.
The voltage should be measured at the field power connection point in the unit and while the unit is operating at full load maximum amperage operating condition.