Honeywell 24v Furnace Transformer Wiring. Disconnect power supply before installing transformer. Each part should be set and connected with.
Tape all unused exposed leadwires separately. And the other side of the relay coil back to the transformer but the opposite from where the red thermostat wire attachs to the. When the device is used both to control a furnace fan on-and off as well as serve as a LIMIT switch then all four terminals are.
Adding a 24 VAC external transformer.
Honeywell HEA Installation Instructions. Assortment of 24 volt transformer wiring diagram. Disconnect power supply before installing transformer. Wiring the Furnace Combination Fan Limit Control using the Honeywell L4064B as an Example.