Actuator Help

Rdriver

Hello there. I'm struggling with replacing an actuator. While replacing it, I'm now trying to figure out if the valve is a mixing valve or a diverter valve. Attached are pics. Can anyone help me determine if it's a mixing valve or a diverter valve, and recommend a replacement actuator? Thank you so much.

hot_rod

It is a 4 way mix valve for low temperature heaters. Do you have radiant heat in the home?

InFloor private labeled that valve, I believe it is a tekmar brand, # 722 so you have other actuator options.

Check both the actuator and that tekmar control to be sure which has a problem.

Rdriver

Yes, I have radiant floor heating, and the actuator hasn't moved in a year. How do I test to see if the actuator has the problem, or if it's the control? here's a closeup of the control

Rdriver

I should add that the valve moves freely when I put the actuator into manual model.

hot_rod

you need a meter to first check power to the tekmar control, then output from the control

Tekmer website probably has a manual with troubleshooting procedures on the control

That control is 25 years old, probably the actuator also

hot_rod

https://www.watts.com/products/hvac-hot-water-solutions/controls/setpoint-controls/153

Rdriver

@hot_rod Thank you so much!