Ac Control Wiring
Control wiring is used to communicate commands and other information between control devices in a lighting system.
Ac control wiring. The electrical wiring inside both of indoor and outdoor units is more complicated than that of window air conditioning units. This diagram is to be used as reference for the low voltage control wiring of your heating and ac system. Y this is the terminal for cooling or air conditioning and goes to the compressor relay. Always refer to your thermostat or equipment installation guides to verify proper wiring.
Notesome ac systems will have a blue wire with a pink stripe in place of the yellow or y wire. Every conventional residential ac system uses 24 volts for the control of the system. Circuit boards or printed circuit boards found in modern systems utilize 24 volt control which originates from the control transformer. This wire is then spliced for the separate wire pull which is made to the condenser.
For programmable thermostatsand smart thermostats c wires are essential for setting a schedule or having your heat or air conditioner turn on at a desired temperature. 2 wires system this is usually a home heating system 3 wires system also possible only a heating system 4 wires system sometimes when changing over from an older mechanical thermostat you will find the four wire systems. Typically a thermostat wire pull is made to the air handler on split systems. 5 wires systems this is typically air.
Wiring for air conditioning systems in the detailed design phase the electrical designer must size and select the wires cables conduits starters disconnects and switchgear necessary for supplying power and control to hvac equipment. This diagram is to be used as reference for the low voltage control wiring of your heating and ac system. 2 3 electrical wiring connections inside the split air conditioning units. All the relays in the system have 24 volt coils.
There is a signal cable also connecting the control in the indoor unit with the control in the outdoor unit. Always refer to your thermostat or equipment installation guides to verify proper wiring.