Room Thermostat Installation

tonyh66

Hello, I'm installing a room thermostat to switch my boiler on and off. I have a radiator in the hall with no TRV on, just 2 lockshields I think its used as a heatsink if all the other rads are up to temperature. Can/should I install a TRV onto this radiator when the thermostat is installed? The thermostat will be in the lounge.

brightontraveller

tonyh66 wrote: »

Hello, I'm installing a room thermostat to switch my boiler on and off. I have a radiator in the hall with no TRV on, just 2 lockshields I think its used as a heatsink if all the other rads are up to temperature. Can/should I install a TRV onto this radiator when the thermostat is installed? The thermostat will be in the lounge.

Most common place to have a radiator without a non-thermostatic valve is in the bathroom or the room where the thermostats in but without getting into where stat should be sited when or if TRV are needed etc system as you describe leave one without TRV....

tonyh66

So I should take the TRV off the lounge rad and put it onto the hall rad. and have no TRV on the lounge rad.

The thermostat will be near opposite wall to radiator in lounge, about 4-5m apart.

all other rads in the house will close to TRV setting, boiler will stay on until thermostat in lounge gets to set temperature.

southcoastrgi

I always fit the stat in the hall, what is your reason for wanting it in the lounge ?

Strider590

You should fit the thermostat at the core of the house, which is normally the downstairs hallway.

elver_man

Personal preference but I have always fitted Room Stats in the Hallway, making sure that the Rad is correctly sized for the area and no TRV.

Apodemus

I would be wary of changing a heat dump radiator unless you are sure you know what the boiler requirements are. It may be designed into the system as a fail-safe to dissipate heat if the circulation pump stops running. You might not get sufficient convection circulation to the lounge rad if you were to swap them over.

tonyh66

southcoastrgi wrote: »

I always fit the stat in the hall, what is your reason for wanting it in the lounge ?

Its a bungalow, the hall is in the middle of the house. small corridor with no windows. this rad gets hot while the others in the house are barely warm. If the thermostat is in there I think the lounge will never get warm as the heating will switch off to soon.

If I swap to TRV in the lounge for a lockshield so the lounge rad becomes the 'heatsink' then the heating will run until the stat reaches the desired temperature in the lounge. All other rads will be controlled by the TRVs.

The lounge is about twice the size as any other room in the house.

I think the 'heatsink' rad is only there because there is no other control to turn the boiler off other than the mechanical timeswitch on the boiler, so it will run even if all the other rads are closed by the TRVs.

I have only recently moved into the house and feel the whole system needs balancing, the rad furthest from the boiler doesn't get any heat at all unless all the others are closed.

The plan is to install a Hive to have more control and turn the heating on and off from the sofa rather than having to go into the cupboard all the time.

Thanks for your help everyone.

Rodders53

You need to examine the whole design of the heating system and if any automated bypass valve is / ought to be fitted (as required by modern building regs with trvs on all radiators).
Changing any radiators for bigger if necessary.

Plus a proper balance etc.,. and allow for any boiler over-run and heat dissipation needs.

Slowly getting to grips with the install in my new to me but 9 year old home and sorting out the badly balanced, always on auto bypass (now tweaked).... Inadequate heaters (towel rads only) in the bathrooms. Plumbed by Bodgit, maintained by Scarper, I reckon.

tonyh66

Rodders53 wrote: »

You need to examine the whole design of the heating system and if any automated bypass valve is / ought to be fitted (as required by modern building regs with trvs on all radiators).
Changing any radiators for bigger if necessary.

Plus a proper balance etc.,. and allow for any boiler over-run and heat dissipation needs.

Slowly getting to grips with the install in my new to me but 9 year old home and sorting out the badly balanced, always on auto bypass (now tweaked).... Inadequate heaters (towel rads only) in the bathrooms. Plumbed by Bodgit, maintained by Scarper, I reckon.

boiler and rads were installed about 4 years ago, its an Ariston Clas HE evo I think it has a bypass built in. I'm not impressed by the pipework, loads of solder run off at joints and not cleaned properly afterwards. They have ran 10mm plastic coated copper under the floors to the rads, no clips, no insulation, also no drain on any of the rads.
They have spurred the power off the lighting circuit for convenience, i'd be happier if it was on its own in the consumer unit (not necessary but thats how I like it). Im guessing they have not balanced the system I will look at that at some point.

Alex1983

How many radiators do you have?