Which thermostat for hot water cylinder?

Better_Days

We have an elderly floor standing oil boiler.

There is a large foam lagged cylinder in the airing cupboard for hot water (and an immersion should we need it)

When we bought the house last year it was noted on the survey that there is no thermostat on the hot water cylinder. So I have been looking at cylinder thermostats but don't know enough to make an informed decision.

Have seen these on Amazon - are they what I need and is there much to choose between them?

http://www.amazon.co.uk/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=cylinder+thermostat&rh=i%3Aaps%2Ck%3Acylinder+thermostat

getmore4less

what boiler/heating controls do you have and what configuration is the heating/water.

cyclonebri1

getmore4less wrote: »

what boiler/heating controls do you have and what configuration is the heating/water.

WADR the op won't know, he needs a heating guy in to help

Better_Days

Thanks for responding.

We currently have a thermostat in the living room for the heating (which doesn't work properly) and a Potterton EP2000 Programmer for the heating and hot water. The temp of the water is currently determined by the temp dial on the front of the boiler (I think). AIUI we can have the programmer have the HW on, heating and HW, but not heating and no HW. As a result the HW gets very hot in the winter when the heating is on all day and the temp dial on the boiler is turned up.

The programmer doesn't work properly either and it can be hit and miss as to whether we get the heating on when we move the sliders up and down, and the 'advance' button doesn't work at all. I have bought a wireless programmable thermostat http://www.amazon.co.uk/SALUS-IT500-Internet-Controlled-Thermostat/dp/B00FKRS514/ref=sr_1_4?s=diy&ie=UTF8&qid=1412777134&sr=1-4&keywords=salus+wireless+programmable+thermostat to replace the Potterton which will be fitted at the same time as the cylinder thermostat by a heating engineer (not me you will glad to hear given my questions!) along with TRV's.

Is this all the info you need?

getmore4less

You need to understand the configuration of the heating/water and how are they zoned?

having 2 stats won't help if there are not the correct valves to control the water

if it is using a mid position valve then the tank stat must have both NO/NC connections (think most stats do but some controllers don't .

Not familiar with that programmable stat.
edit : got he installation manual which has examples of the wiring for different configurations

https://www.salus-tech.com/cache/.../iT500-Installer-Manual-16pp-045-QR.pdf


The heating engineer should be able to supply a tank stat cheaper should be standard kit in their van.

Why not go programmable hot water at the same time if doing this upgrade, we have the water good for shower washing up etc, then have a boost for a hot bath,

Better_Days

getmore4less wrote: »

You need to understand the configuration of the heating/water and how are they zoned?

having 2 stats won't help if there are not the correct valves to control the water

if it is using a mid position valve then the tank stat must have both NO/NC connections (think most stats do but some controllers don't .

Not familiar with that programmable stat.
edit : got he installation manual which has examples of the wiring for different configurations

www.salus-tech.com/cache/.../iT500-Installer-Manual-16pp-045-QR.pdf


The heating engineer should be able to supply a tank stat cheaper should be standard kit in their van.

Why not go programmable hot water at the same time if doing this upgrade, we have the water good for shower washing up etc, then have a boost for a hot bath,

Many thanks for this. I wanted to have a basic understanding of what could be done with the system that we have, although I appreciate it is difficult from a distance. Our boiler is a Camray 2, but I haven't been able to find a manual for it to see what the configuration is likely to be.

If we don't have the correct valves to control the water is it possible to install them and if so is it a big job?

You have suggested we go for programmable HW - I must admit that I thought I would be able to do this with the Salus IT500. We actually use very little HW. We have electric showers, a dishwasher and never have a bath. I suspect we are currently wasting a lot of oil heating up the HW tank when it is not needed.

So do you think I will need some extra kit to programme the HW, or does it depend on the valves you mentioned above?

getmore4less

I think the salus will let you time when the water is on and a simple stat will control the temp which is probably enough, we wanted different temp at different times so needed something more programmable.



Typical single zone heating/HW systems are 2 valve one to control each or use a single mid position valve to divert the water or have it do both HW and heating.

if you look at the salus manual it has examples and if you look at the plumbing where the HW tank boiler and pump are it may be possible to work it out.

There is another potential issue if you TVR all the rads you may need a bypass or at least one rad not TVR.

Since you are getting a heating person in why not get them in to quote for the upgrades and have a look at what you have.

cyclonebri1

getmore4less wrote: »

I think the salus will let you time when the water is on and a simple stat will control the temp which is probably enough, we wanted different temp at different times so needed something more programmable.



Typical single zone heating/HW systems are 2 valve one to control each or use a single mid position valve to divert the water or have it do both HW and heating.

if you look at the salus manual it has examples and if you look at the plumbing where the HW tank boiler and pump are it may be possible to work it out.

There is another potential issue if you TVR all the rads you may need a bypass or at least one rad not TVR.

Since you are getting a heating person in why not get them in to quote for the upgrades and have a look at what you have.

Yes this is the bit I was saying too, there are too many system variations to be able to give accurate views without having taken a good look, luckily the OP is going the correct route, but the fitter should still be ok with your choice of stat though OP

Better_Days

Thank you getmore4less and cyclonebri1 for the information and suggestions. Good to hear the Salus stat will likely do the job - I like the idea of being able to control from a smart phone app.

I don't know much at all about the possibilities (only recently found out programable TRV's existed!) so I wanted a basic understanding so that I could ask the right questions when the heating engineer comes without appearing totally clueless! Will bear in mind what you have said about having one rad without a TRV - and will discuss with the heating engineer what is best to do with our configuration.
Thanks again.:beer: