Danfoss HPA2 22/28mm 2 Port Zone Valve Actuator Motor (4 Wire) - Hanicks - 087N657900

The actuator operates on 230V AC.

Yes, the HPA2 is designed to be a direct replacement, allowing you to replace the motor head without draining the system.

It is compatible with Danfoss HPV22 and HPV28 valve bodies, as well as several other models as specified in the compatibility section.

The auxiliary switch provides additional control and monitoring capabilities within the heating system.

The wiring diagram is typically provided with the actuator upon purchase and should be followed for correct installation.

Check the model number on your existing valve body. The HPA2 is specifically designed for Danfoss HPV22 and HPV28 models.

If the actuator fails, it should be replaced. Ensure the power is turned off before replacing it. Consult a qualified professional if you are unsure about the replacement process.

Check the power supply to the actuator and the wiring connections. Ensure the wires are correctly connected according to the diagram. Also, check for any obstructions in the valve body.

This could indicate a mechanical issue. Check for any obstructions in the valve or replace the actuator if the noise persists.

Ensure the thermostat is functioning correctly and sending the correct signals. Also, check the wiring between the thermostat and the actuator.