Furnace Transformer Wiring For Home

The transformer steps down 120 volts to the 24 volts the thermostat needs and sends out the 24 volts on two wires.

Furnace transformer wiring for home. A wiring diagram is a simplified standard pictorial representation of an electric circuit. It shows the parts of the circuit as simplified shapes and also the power as well as signal connections between the devices. The first system is for the supply voltage and the other is for the secondary voltage. Remove the transformer using a screwdriver or socket wrench depending on how it is attached.

The wires were long enough to attach to the electrical feeds to the furnace. A universal nema type d furnace transformer for domestic use has an output voltage of 26 5 volts for an input of 120 volts. Assortment of furnace transformer wiring diagram. A wiring diagram is a streamlined conventional pictorial depiction of an electrical circuit.

You ll need to use wire cutters to cut these so that you can disconnect the transformer. A 24 volt transformer is typically used as a control device to turn a higher voltage generally 120 vac into a lower working voltage for switches or relays such as in a furnace thermostat transformer. Variety of coleman mobile home gas furnace wiring diagram. The furnace transformer is comprised of two systems that make up the furnace transformer wiring.

If you are having trouble with your transformer you may have to deal with the internal wires of these two systems. Attach the 24 volt wires on the outside terminals of the transformer. If your home s system of this vintage has provisions for air conditioning cooling then the thermostat wiring will have at least three wires some will require a separate r terminal for heating and cooling and will be labeled rh and rc now needing a minimum of 4 wires r w and a y terminal. Install the new transformer thru an electrical knockout.

Furnace 24 volt transformer r is the hot side while c is the common side of the transformer. Before you wire the new transformer to the furnace read the manufacturer s instructions very carefully. However specialty transformers for custom or elaborate furnaces could have different outputs. It reveals the elements of the circuit as streamlined shapes as well as the power and also signal links in between the tools.

Standard ac with standard furnace control wiring standard furnace standard thermostat standard a c condenser 1st stage heat white 24 volt fan only operation common air conditioning ac contactor control board 1 this diagram is to be used as reference for the low voltage control wiring of your heating and ac system. Remove the old transformer.