Room thermostat and trvs

[Hobo128]

I have moved a boiler in a property and the have open planned the kitchen living room and have 3 tall radiators in the room in each corner. The rads have trvs. If I put the room stat in this room do I need to take off the trvs and replace them with lock she ads or do I only need to do one of the radiators?

 

[steadyon]

Neither. You can leave the TRVs on each radiator, but set them all to maximum temperature, and set the room thermostat to the temperature you want in the room. That way. if you move the room thermostat to a different room, you can reinstate the TRVs on the three kitchen / living room radiators, although they should all be on the same setting.

Don't forget TRVs sense the room temperature, not the radiator / water temperature.

 

[Sparkgap]

I'd suggest just using the room stat as a high limit and have the temps controlled by TRVs.

 

[Hobo128]

I get what your saying and on paper it works but I'm talking about the regulations

 

[Best]

I think regs just basically want thermostatic control in every room, so it will comply.
The room stat will actually prevent the system zoning or shutting off if the TRVs in that room are all turned too low, - so potentially it could be wrong.
If you are in doubt, - simply remove the TRV heads and use the manual caps, or replace the TRVs for ordinary wheel heads

 

[Gary80gas]

Its a sizable room with 3 rads so set the trvs to whatever feels right for each area and use roomstat as main control

 

[lame plumber]

I'd suggest just using the room stat as a high limit and have the temps controlled by TRVs.

I suggest you learn what a boiler interlock is, why it is required and how a room stat achieves this in practice.then have a read of post 2, which isnt the best practice but a practical method of achieving a functioning room stat

 

[Leo21]

Building regs state that the radiator nearest the room stat should be the bypass. The reason being that if the trv was to shut off the room stat wouldn't reach temperature. Therefore not achieving interlock.

 

[plumben]

Considering most wireless room stats come with the option of moving it around i'd says having trv heads on just set to high should be fine although you could just remove the heads and put the decorating caps on

 

[lame plumber]

Building regs state that the radiator nearest the room stat should be the bypass. The reason being that if the trv was to shut off the room stat wouldn't reach temperature. Therefore not achieving interlock.

dont building regs state you have to use an auto bypass nowadays?

 

[Leo21]

dont building regs state you have to use an auto bypass nowadays?

I think that's down to boiler m/I,s.

 

[Leo21]

Considering most wireless room stats come with the option of moving it around i'd says having trv heads on just set to high should be fine although you could just remove the heads and put the decorating caps on

Yes it would be fine, and it would make sense. But we're talking regs, not common sense. Two very different animals.

 

[lame plumber]

I think that's down to boiler m/I,s.

that was my way of saying building regs stipulate an auto bypass on all new systems/upgades now

 

[Leo21]

that was my way of saying building regs stipulate an auto bypass on all new systems/upgades now

Is that right? I haven't heard of that, yet.

 

[lame plumber]

Is that right? I haven't heard of that, yet.

cmon Leo, flip to the front, catch up with the rest of us