Electrical wiring from boiler to thermostat

insearchofwarmth

We recently got a new boiler for our house. We have a one pipe system with cast iron radiators across three levels. We have resized the valves with Gorton valves throughout based on size and distance from the boilers, and the main vents have also been replaced.

We noticed that the thermostat would read the incorrect temperature for the room, which would in turn make it harder to heat up the rest of the house. The thermostat would read a temperature of 72 even if the room was actually 64.

At some point my plumber checked the wall where the thermostat was installed and noticed that it didn't have any insulation. I added some insulation (as you'll see in the pictures) and this improved the situation significantly, but there's still a gap. I have to set the temp to 74 for the rooms across the house to reach a comfortable temp, with the coldest room only reaching 63.

I noticed that the wire from the boiler up to the thermostat seems to be near warm pipes throughout and I'm wondering if this is standard? If not standard, I'm wondering if this could be the reason why the temperature readings continue to be off. If standard and the warm pipes shouldn't impact the reading, then I'm not sure what is going on.

IMG_7550.jpeg

IMG_7551.jpeg

IMG_7552.jpeg

IMG_7553.jpeg

IMG_7554.jpeg

Jamie Hall

Heating up the wires won't make any difference — but any warm air from those pipes getting to the thermostat most assuredly will. Seal up the wall — and around those pipes — as best you can.

Now as to the temperature variation from room to room — you have made a start on the venting, but for better or worse venting doesn't always read the same manuals. The thing to do is to begin changing the vents, but don't do this all at once. Put a very slow vent on the radiator in the room with the thermostat to begin with. Then note how other rooms respond, and if there are others which are still too warm, slow them down too — but only one at a time, since changing venting in one place will affect nearby radiators, if not the whole system. Only when you begin to run out of too warm rooms can you consider putting a faster vent on the radiators in the rooms which are still cool.

HVACNUT

The thermostat was fine with the old boiler?

Can we see pics of the new boiler?