Underfloor heating not working

[chrismullin1]

Hi

I have underfloor heating in my kitchen extension which does not seem to be working at the moment. Please can I check should the red handle on the manifold flow pipe be at 90 degrees to the pipe when in operation? Please see the photo.

Also, I have two thermostats in the house, one for the radiators in the rest of the house and one for the underfloor heating. How do I isolate them from one another as currently the underfloor heating thermostat turns on all the radiators in the house which I do not want. Reason being the underfloor heating takes several hours to warm up whilst the radiators warm up the rest of the house very quickly.

Thanks for any advice!

 

[muggles]

Red handle should be vertical, same as the blue one. I studied the answer to your second question is "you can't" but will need more info about how it's piped up to your system