central heating timer replacement

[alexdc12]

Hi All
I currently have a Horstman 425 Diadem timer and it keeps loosing time this week this morning it was 3 hours behind schedule. I want to upgrade this to a digital timer, is there one that would be a straight swap? Can i pick anyone and use the existing wiring? Is there a recommended upgrade?
Many Thanks

Alex

 

[denso13]

Not a huge Horstmann fan but the 21/27 series is a straight swap http://www.gil-lec.co.uk/products/C...+24hr+2+Channel+Digital+Programmer/2005970180

 

[D_Hailsham]

You can use any two channel programmer (Honeywell are very good). However, the Horstmann does not use a standard back plate and the terminals are different. So there's a bit more work involved in the change.

Do you have a room thermostat? If you don't, you should consider the Honeywell Sundial RF² Pack 2. It's a two channel programmer with a wireless room thermostat.

 

[alexdc12]

Yes I have a room stat even tho I do have tvrs.

 

[alexdc12]

Would the Horstmann Centaurplus C27 work?

 

[denso13]

Would the Horstmann Centaurplus C27 work?

Not as a direct replacement.

 

[alexdc12]

I bought that and wired it straight in and all seems good. Thanks for the help