How to avoid leaving one radiator "open"?

[ifatfirst]

I am replacing my central heating system. I want to have system on all the time and control each room individually using TRVs and do not want to leave one radiator open. Bungalow, sealed system, 11 radiators.

Old system was Worcester 28RSF with Danfoss 103E5 timer and TRVs on all radiators. Worcester's technical staff gave instructions on fitting an additional by-pass to obviate need for leaving an open radiator. Worked OK.

New system Worcester Greenstar 28i with a Honeywell CM921 Wireless Room Thermostat. Installer insists on having one radiator "open" (no TRV) - which I've tried and it doesn't suit me.

Any way of having all radiators on TRVs, no open radiator and is by-pass already fitted likely to suffice? (Still have Worcester's instructions for by-pass spec.)

Any ideas gratefully received.

 

[seco services]

New system Worcester Greenstar 28i with a Honeywell CM921 Wireless Room Thermostat. Installer insists on having one radiator "open" (no TRV) - which I've tried and it doesn't suit me.

why don't it suit you ?

 

[gasfitter]

you should not have a trv fitted in the room were the room stat is fitted, usually the hall.

 

[ifatfirst]

Different people in different rooms want different temps at various times of day/night. Leaving system on all the time enables each individual to turn heating on/off in their own space. Means room with open radiator gets roasting hot even when it's empty. If it's on a TRV can be turned off/down.

 

[ifatfirst]

Exactly as installer (very nice person) has fittted it - no TRV in hall. Will only solution be to switch boiler on and off via thermostat controls?

 

[seco services]

well turn the stat right up then and turn the rad down

 

[gasfitter]

Exactly as installer (very nice person) has fittted it - no TRV in hall. Will only solution be to switch boiler on and off via thermostat controls?

If you turn the hall trv off then your boiler will not be thermostaticaly controled.

Its been designed to save the householder money and its also for comfort.

if ya really want ya could just ignore what the experts have to say, you could even fit two trvs to the hall rad if ya want.

how long have you been a heating engineer for your

 

[ifatfirst]

Sorry, don't understand. Can't turn the rad down as it's got two lockshield valves. Can they be adjusted to turn the rad down? Apologies for being a bit thick!

 

[gasfitter]

Sorry, don't understand. Can't turn the rad down as it's got two lockshield valves. Can they be adjusted to turn the rad down? Apologies for being a bit thick!

it is not suposed to be turned off, because if its turned off it defeats the purpose of the room stat,

 

[kirkgas]

surely an automatic bypass valve would allow all rads to be individually controlled as opposed to one being used as a bypass

 

[ifatfirst]

Thanks for advice. Understand that room stat and what I want not compatible - for reasons you've pointed out. Can systems be fitted just with old fashioned timer, no room stat and meet building regs?

 

[ifatfirst]

kirkgas, that's what I'd hoped, with the room stat being portable it would respond to whatever heated room it was in, therefore all rads could be on TRVs.

 

[gasfitter]

Thanks for advice. Understand that room stat and what I want not compatible - for reasons you've pointed out. Can systems be fitted just with old fashioned timer, no room stat and meet building regs?

no you need a room stat for building regs

 

[gasfitter]

surely an automatic bypass valve would allow all rads to be individually controlled as opposed to one being used as a bypass

its not being used as a bypass

there is already a bypass fitted to system.

there should not be a trv fitted in the same room as the room stat, because the trv could stop the room stat from doing its job

 

[seco services]

sod the room stat link it out and fit a trv to the rad.