how to Jumper for run FCU

How to jumper for run FCU

To jumper for running a Fan Coil Unit (FCU), you can follow these general steps:

Ensure Safety: Before performing any electrical work, make sure to turn off the power supply to the FCU at the circuit breaker or disconnect switch. This step is crucial to prevent electrical shocks or accidents.

Identify the Control Wiring: Locate the control terminal strip or control board of the FCU. This is where the control wires from the thermostat or building automation system are connected.

Locate the Run Terminal: On the control terminal strip or control board, identify the terminal labeled "Run" or "R" for the fan motor. This terminal is typically used to supply power to the fan motor when the FCU is operational.

Identify the Common Terminal: Locate the terminal labeled "Common" or "C" on the control terminal strip or control board. This terminal is the common connection point for the control circuit.

Connect the Jumper Wire: Take a jumper wire or a short piece of wire and connect one end to the "Run" terminal and the other end to the "Common" terminal. This creates a direct connection between the power source and the fan motor, bypassing any control signals from the thermostat or building automation system.

Secure the Jumper Wire: Ensure that the jumper wire is securely connected to both terminals. You may use appropriate connectors or tighten terminal screws, depending on the type of connection used on the control terminal strip or control board.

Inspect and Test: After connecting the jumper wire, visually inspect the connections to ensure they are secure and free from any exposed wires. Once everything is in order, restore power to the FCU at the circuit breaker or disconnect switch. Test the FCU to verify that the fan motor is running by turning on the system or manually triggering the fan operation.

Remember, this general guide assumes basic knowledge of electrical systems and control wiring. If you are unsure or uncomfortable with electrical work, it is always recommended to consult a qualified HVAC technician or electrician to perform the task safely and correctly.