Jump to content

DONT STAY LURKING AS A GUEST,

JOIN TEF AND BENEFIT FROM MEMBERSHIP:

CLICK HERE TO JOIN.
Sign in to follow this  
Hytech Steve

Nest thrmostat install to worcest heatslave 20/50

Recommended Posts

Hytech Steve

Hi All,

Has anyone fitted NEST to this boiler as it has on board 3 position valve. Surely you do not have to cut into boilers on board wiring loom as its all plugs & skts. The Nest diagrams only show seperate DHW & CH motor valves. ????

Share this post


Link to post
Share on other sites
leesparkykent

you could use Terminal X4 or terminal X2 depending what nest you have.

prog.PNG

therm.PNG

Edited by leesparkykent

Share this post


Link to post
Share on other sites
Hytech Steve

Hi Leesparkykent,

Thanks for reply. This customer wants to control CH & DHW from the Nest so I guess the motor valve needs to move position. Not a problem getting the boiler to come on but if I think correctly you have to get the programmer to be on all the time or am I missing something?? As this boiler is basically a Combi unit does this mean I should'nt touch as I dont have the cert for pressure system??

Share this post


Link to post
Share on other sites
NozSpark

As Lee said,,,, just wire the Nest to the X4 plug,,,, you'll have to refit the thermostat link though!

 

You're only fitting the controls, not messing with the pipework, so as long as you're competent crack on

Share this post


Link to post
Share on other sites
steptoe

Depends what nest you have

I've had an ongoing issue with a LL that has bought a load of CH only nests and he wants to know why he can't control DHW with them, :slap

 

Share this post


Link to post
Share on other sites
Badger

but surely a combi on the dhw heats the water as the required need arises from the tap being turned on.

Share this post


Link to post
Share on other sites
steptoe
54 minutes ago, Badger said:

but surely a combi on the dhw heats the water as the required need arises from the tap being turned on.

Yes, but why can't he control the temp as tenants saying hot water too hot, or too cold, I'm not sure they have for the idea of how mixer taps work, :slap

 

Share this post


Link to post
Share on other sites
Rob_the_rich
On ‎09‎/‎07‎/‎2016 at 20:14, Hytech Steve said:

Hi Leesparkykent,

Thanks for reply. This customer wants to control CH & DHW from the Nest so I guess the motor valve needs to move position. Not a problem getting the boiler to come on but if I think correctly you have to get the programmer to be on all the time or am I missing something?? As this boiler is basically a Combi unit does this mean I should'nt touch as I dont have the cert for pressure system??

it is not a combi. If the thermal store is not hot, no hot water will come out of the taps. look at the manual https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwj6zof4q-vNAhXlL8AKHTS2CgQQFggfMAA&url=https%3A%2F%2Fwww.worcester-bosch.co.uk%2Fsupport%2Fdocument%2Fdownload%2F8716104440&usg=AFQjCNE96FJ1UxrhSWEz4sL6vUsln0h5_A&bvm=bv.126130881,d.ZGg and follow the instructions for fitting an external programmer (ie the nest), as Lee mentioned above.

Edited by Rob_the_rich

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×

Important Information

Terms of UseWe have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.