Replacing central heating programmer

[ciaoflyer]

Hi

Can I replace a Siemens RWB9 with either a Danffoss Randall 3022 or a Danffoss Randall 3020p?

which will work as I am having issues with the RWB9!

Thanks!

 

[Whitespirit66]

You could, or you could replace it with something less olde worlde. Eg. the latest version of the Siemens.

http://www.heatingcontrolsonline.co.uk/siemens-landis-staefa-rwb29-programmer-p-43.html

 

[ciaoflyer]

Thanks for the reply but I already have a randall 3022 in perfect working order but it says it is for a system with a diverter switch but my system does not have this, can it still be used? If not will the 3020p be ok? I have a bit of a retro kitchen so am after a retro timer.........

Thanks again!

 

[Whitespirit66]

Looking at the two Danfoss units, they're not what I originally thought they were. Using these would require rewiring the system, as they have different functions.

If your system is currently using a standard 2 channel programmer, I would replace it with another like the Siemens.

If you really want the 70s look, something like a Horstmann Tiara will have similar connections to your current Siemens programmer. It will blend in nicely with the twintub and lino.

http://www.heatingcontrolsonline.co.uk/horstmann-tiara-programmer-p-55.html

 

[ciaoflyer]

I like that! Thanks!

Are these posibilities......

http://www.ebay.co.uk/itm/Switchmas...arden_Hearing_Cooling_Air&hash=item3ccf03d140

http://www.ebay.co.uk/itm/Switchmas...arden_Hearing_Cooling_Air&hash=item3ccf040f53

 

[ciaoflyer]

Anyone know?