Exhaust Fan Interlock Wiring Diagram

The electrical wiring would be connected with the power source in and load out to the bathroom exhaust fan a neutral wire if required and a ground wire. Refer to the motor manufacturers data on the motor for wiring diagrams on.

Fan Control Centers Accurex

Using Rib Relays To Control Bathroom Fans Lights Functional

Ser Series

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Exhaust fan interlock wiring diagram. Diagram a is the more general case in which lights l 1l 2 and the fan are all powered by separate power sourcres. What is the correct way to wire the fan and furnace in a new home. Do i have to interlock all the bathroom fans with the furnace. It will be controlled through a starter with a 120 volt coil. The exhaust fan should be started using a wall mounted switch. 1 or 3 phase power as required from breaker panel to control panel for fans see wiring diagram 1 or 3 phase from control panel to fans see wiring diagram 1 or 3 phase power if tempered make up air is provided from breaker panel to unit. I would use a differential pressure switch dps on the suction side of the exhaust fan to energize the mua fan dampers. After turning off the electrical power to the furnace proceed to wire the thermostat and furnace according to diagram 1 below. These diagrams are current at the time of publication check the wiring diagram supplied with the motor. Diagram b is for the case where electrical power is common for all the lights and the fan from the same source. Below is one example of a occupancy motion sensor switch wiring diagram which should be helpful. When the dampers are proven open via an end switch the mua fan should be started. A dps across the mua fan should monitor the status of the fan to shut down interlock the ef on a supply fan failure. The supply fan is 120 volts the exhaust fan is 480 volts 3 phase. Once the wiring completed turn on the electrical power to the furnace plug the ventilation unit and verify if the relay is working properly.

Exhaust fan damper interlock control question a common problem when combining a building automation system with a 3 phase fan that must open a damper before operating is the damper end switch interlock for the motor starter hand position. On some newer homes ive seen there is a switch in the hallway that somehow is wired in with the fan and furnace. The supply fan shuts off on a fire alarm and the exhaust fan stays onthe controls are breaking through an ansul system.