Want to replace programmer to time the water indepenendantly

[roughjoker]

Hi All,

I've recently had my old condemned boiler replaced with a Bosch Worcester Greenstar 18Ri and kept all the original controls (TRV's, Room Stat, Cylinder Stat and Programmer).

I've always disliked the versatility of the setup. Programmer is a Potterton EP2002 that was installed with the original Potterton boiler. My main gripe is that I cant program the water to be heated at different times to the heating. Not an issue during summer as I don't have the heating on but during the winter I don't want the water heated as long as the central heating etc.

I'd like to change the setup to one that I can program the water and heating independently.

1)Is it a simple case of replacing the programmer with a more versatile one or do I need to alter other aspects of the heating setup?

2)If so can I do it with the current wiring to the programmer available (See pic)?

//media.diynot.com/220000_219978_79544_27914320_thumb.jpg

3)What programmer would you recommend? Ideally I'd also like a 7 day programmer as opposed to the 5/2.

Thanks

Russ

Heating Programmer

• roughjoker
• 12 Jul 2014
• 1

Backplate and wiring for Potterton EP2002

 

[45yearsagasman]

Replace with the latest Potterton EP version of your programmer for ease of fitting. A different model will require a rewire to the new baseplate.

 

[D_Hailsham]

Do you have any motorized valves?

 

[roughjoker]

Gasman - Good suggestion! Thanks.

D - I think so. I've got this Honeywell valve in the airing cupboard next to the cylinder (see pic).
//media.diynot.com/220000_219978_79590_51904417_thumb.jpg[GALLERY=media, 79590][/GALLERY]

 

[ggbheating]

POTTERTON EP2 PROGRAMMER this is the direct replacement and fits on to baseplate also has independent heating and water.

 

[roughjoker]

Thanks ggb. Will there be a need to alter the wiring on the baseplate?

 

[EFLImpudence]

Shouldn't the existing programmer work as the OP wants?

 

[D_Hailsham]

Shouldn't the existing programmer work as the OP wants?

Unfortunately not. The EP 2002 uses a single timebase, so CH and HW times are always the same.

A replacement programmer is the only solution.