Dual set temperature for Worcester Greenstar Regular

[Beelbeebub]

Hi,

 

Quick question.

 

I have a WB Greenstar 30Ri supplying a thermal store and low temp (35Cish) Central heating system.

 

I would like to move to an unvented cylinder for DHW and direct for the CH.

 

Is there a way to have 2 set temps on the (WB) boiler depending on which system is calling for heat?

[JohnMo]

You need priory demand hot water (PDHW). Read your manual it may be equipped with most of what you need or some options may need adding.

 

Search for PDHW on Google and have a read up. Avoid S and Y plan.

 

Or a simple add on kit.

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.ephcontrols.com/section/pdhw/&ved=2ahUKEwikra_CwYuKAxVtWEEAHZmoAr4QFnoECEEQAQ&usg=AOvVaw1ZNV4XzRVOTkPHFUHziTIr

 

You can also DIY it, with a resistor and a relay also. Basically you fool the boiler into thinking it's running weather compensation and break the signal (with relay) and the boiler moves to normal mode to heat cylinder.