electronic TRV?

whowantstwoknow

Hi,

I have both the CH & HW circuits working independently from each other to fire the boiler etc. Each circuit is programmed by a controller. Now in hindsight while doing a renovation a few years ago I should have split the CH circuit into upstairs and downstairs, but I didnt.

I find when the CH circuit is programmed to come on in the morning the bedrooms heat up too much and become "stuffy". Each rad currently has a mechanical TRV. Now I could go to the effort of finding where the CH circuit forks to feed upstairs/downstairs but that will be accessing floor space etc... But as a "simplier"? alternative would it be possible to install an electronic TRV say in the bedrooms that can be programmed to turn off these rad as needed (ie in the morning primarily)? What sort of product is on the market, a google search has given this product. I would need to "upgrade" 5 bedroom rads..

Just reading a bit more online, would the noise of these units be an issue in bedrooms?

Your thoughts would be much appreciated.

Thanks
W.

JohnnieK

Honeywell do them, expensive though. Look up C&F Quadrant and ring them for prices.

sullzz

http://www.gasproducts.ie/acatalog/Terrier_Programmable_Radiator_Controls.html

I never used them , never seen them used , don't know anything about them , i just remember seeing them on this website

DGOBS

I believe Danfoss do a version that wireless transmits back to a base to give full boiler interlock, if Shane is a bout, he'll jump in here, think he has used them...SHHANNNNEEEE......! (he's too busy now playing with his new iphone)

JohnnieK

DGOBS wrote: »

I believe Danfoss do a version that wireless transmits back to a base to give full boiler interlock, if Shane is a bout, he'll jump in here, think he has used them...SHHANNNNEEEE......! (he's too busy now playing with his new iphone)

Danfoss WHAT!!!

Is there anywhere in Ireland that stocks complete range of Danfoss controls? I look on there website and drool at what they have and If you ask suppliers over here they look at you as if you have two heads. I think there still just getting over the lever valve zoning set up:D

whowantstwoknow

Thanks,

I previously had danfoss motorised values in the house and they were rubbish (leaks), so it would take alot to consider anything else from them to be honest.

I think having control over the boiler is overkill for what I need...

I guess does anybody have an actual experience of such devices? Apart from the function they perform, I'd be concerned any noise level that might wake me up as I'm a light sleeper?

W.

sullzz

I wouldnt rule out danfoss , they have a great reputation , i often work on heating systems which have danfoss trvs fitted and have never given a bit of trouble and have had to replace myson actuators on other trvs which have only been in a couple of years ,
The only issue i have with danfoss is their availability

DGOBS

Without the control back to the boiler, when all rads close the boiler will short cycle and your fuel usage/cost will go up, but then you know best mate.

whowantstwoknow

DGOBS wrote: »

Without the control back to the boiler, when all rads close the boiler will short cycle and your fuel usage/cost will go up, but then you know best mate.

Far from knowing best just a home owner!!! but if these etrv values are closing say just the bedroom rads while the "main" controller has asked the boiler to heat the entire CH rads, the remaining mechanical TRV rads would be "on" heating the rest of the house. Would the boiler still short cycle?

There are 19 rads in the house, with the etrv closing 5 bedroom rads for a short period in the morning while we are still in bed. No teenagers yet so nobody sleeping til the middle of the day!!

Thanks
W.

DGOBS

But what happens when all rooms are at temperature (ie, all trvs close) thats when you want your boiler interlock to tell the boiler you have enough heat for the time being and turn off unit you need more!

whowantstwoknow

I have mechanical trvs on all rads with the exception of one in the area where the CH thermostat is. If all TRVs close then the flow can still go through this rad or until the area temp reaches the thermostat setting and then subsequently the boiler will turn off.

So in the bedrooms the trv are currently controlled by temp, whereas the etrv will introduce the option of control by time/temp.

Am I missing something? Or is my current setup so out of date?

Thanks in advance
W.

sullzz

Renubath do a nationwide service , they are the only company i know of , i have seen old cast iron baths done and they come up like new .

shane0007

Sorry guys, only read the thread now and yes I was playing with my new iPhone. Being always a Blackberry man, I am now truly converted!

Yes, I have installed a few wireless trv systems. I installed the Honeywell Evohome Sundial System. Lovely piece of kit, but very very expensive. It is a terrific system. Each trv calls in the boiler independently. Well I say it is wireless, I had to do a lot of wiring in the wiring centre, hmmm.

Cost is the big issue. Stupid prices in this country, a bit less stupid in UK.

If anybody wants more info, I can post a few links, brochures, etc.
Final commissioning of installation had some teething issues but excellent technical support via phone to sort.

whowantstwoknow

Thanks for the info, but ignoring the etrvs, with my currently setup would the boiler short cycle? if not then adding etrvs wont introduce such a behaviour?

Thanks
W.

garjdon

I would appreciate any info on where to purchase the evohome system and any other info thanks.

shane0007

garjdon wrote: »

I would appreciate any info on where to purchase the evohome system and any other info thanks.

Forget about purchasing them in Ireland, every supplier is quoting literally double what they can be purchased for in the UK. You can purchase them on-line directly from the UK. Let me know what system you have and how many radiators, etc. and I will do you up a components list with part numbers to order.

garjdon

Ok so at the moment there are three Zones, Zone 1 main room is underfloor heating, Zone 2 is rest of down stairs sitting room, study and hall, 3 rads. Then Zone 3 is upstairs, 5 rads. Then the hot water is just always heated if the heating is on.

shane0007

Do you wish to control each ufh loop with evohome or just the ufh zone collectively? They do a stat suitable for ufh but now you are getting into serious bucks as each loop actuator will have to be replaced with evohome. If so, how many loops are there?

shane0007

Here's the brochure

garjdon

Collectively is fine I think, is there any reason they would need to be controlled individually? its just one room that has the ufh. Thanks for the help by the way.

shane0007

I have not installed their system with ufh, only with rads. I can call their tech team in the UK and find out the benefits, etc.

When you say one room stat, is that just one room has ufh or one room stat is controlling multiple ufh loops?

garjdon

Yea one room has ufh. My system would be similar to page 20 here.

JohnnieK

garjdon wrote: »

I would appreciate any info on where to purchase the evohome system and any other info thanks.[/Quote

c&F Quadrant in cherryorchard.