how to fit a thermostat?

[webplay]

Hello

I have a couple of jobs that need doing on my central heating.
We had cavity wall insulation done last week and now have a lovely toasty house. So much infact I need to turn the heating down a bit.

We have a Baxi Solo 2 PF boiler powering 7 rads. Of which all but two have TRV's fitted. I understand that what I need is a room thermostat to keep a more even temperature and not have the 2 rads without TRV's blasting out loads of heat.

Is this the kind of job that a pretty competent DIYer can do? Does anyone have a guide to accomplishing this or if this is something I need to get a plumber in, a rough idea of what it might cost?

Back to the TRV's for a moment. I want to move one from a rad that has one for another that does not. Can I just close the flow and return valves and unscrew the TRV or will I be upto my knees in water. (Simple instructions needed really)

Any help would be welcome.
Apologies if this is a bit basic. I have tackled a range of work around the home but are new to plumbing and heating.

ta

 

[Bahco]

You will have to drain down both rads to change valves
Hopefully one of the pros can assist you with the roomstat or post on sparkies forum

 

[ChrisR]

Adding a stat is pretty simple. Get the boiler instructions from Baxi/potterton. Hardest bit is running the cable, unless you use a radio stat.

 

[--tom]

ChrisR, would you mind giving the pro's and con's of radio stats?

 

[brumylad]

Does your boiler supply heat energy to a hot water (copper) cylinder ?

 

[ChrisR]

Pro - saves wiring, You can get room and HW cylinder versions.
Con - expensive, of the order of £100, more if programmable.

Batteries last a year or two

 

[raychem]

BAHCO,just out of interest from a novice,could he simply leave the TRV in place set at max/fully open, instead of replacing them with normal rad valves.just a thought.

 

[breezer]

most people do. i think trvs are a pain

 

[Bahco]

BAHCO,just out of interest from a novice,could he simply leave the TRV in place set at max/fully open, instead of replacing them with normal rad valves.just a thought.

Not sure I quite understand your question

The poster has 2 rads without trvs pumping out heat and obviously making the room uncomfortably hot. Adding trvs would turn off the rad flow when the air around it has reached the set desired temp.
Hope this explains it to you, maybe you have misread the first post

 

[raychem]

I just thought,again not doubting your reply to Webplay,Why not open all the trv's to max temp,then install a thermostat to run the system.Would the system not work like this ,if it did then it would save Webplay the trouble of changing all the valves on his rads.As I said in previous reply I do not know about c/heating but just inquisitive about the workings of It.

 

[kevplumb]

if the trv closes down before the room stat you boil
if it dosent you freeze

 

[raychem]

Kev ,I see that but what I can't get my head round is that if a Trv is set at max it would not open and shut off as regards room temp , It would shut off when it reached its max operating temp and if the thermostat was set at below that temp then the thermostat would be controlling the boiler not the Trv.

 

[kevplumb]

if the roomstat is set lower than the trv it would work