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Topic Title: Horstmann 2 zone storage heater control
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Created On: 21 December 2012 03:42 PM
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 21 December 2012 03:42 PM
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Avatar for dickllewellyn.
dickllewellyn

Posts: 1150
Joined: 19 March 2010

Just a quick one before the Christmas cheer takes over.

I've got a little job where the house is running storage heating. The heaters are controlled by a horstmann timer in the kitchen, with two mechanical timers on marked zone 1 and zone 2, and also boost dials. The clocks have started to get quite loud, and the client would like em changed. Does anybody remember such timers? And have any idea as to what could be used in its place? I may have a picture somewhere I can upload if memories need jogging!

Thanks everyone.

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Richard (Dick)

"Insert words of wisdom and/or witty pun here"
 21 December 2012 04:14 PM
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normcall

Posts: 8118
Joined: 15 January 2005

This sounds like the Dimplex tri-plan timer.
If so, the clocks are Horstmann mounted on an early type of DIN rail. They used to have 2 30A skeleton relay/contactors and were actually designed for panel heaters. They stopped making those clocks a while ago and you could 'adapt' something depending on the situation.
1 - move supply to off peak and by-pass the unit.
2 - use a CH programmer to control the relays (HW=Zone 1 and CH=Zone 2, for example)
3 - standard time switch to control relays.
4 - standard time switch to control small relays in enclosure.

That should keep you going for a few days while you think of other permutations.

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Norman
 21 December 2012 04:37 PM
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dickllewellyn

Posts: 1150
Joined: 19 March 2010

Cheers norm. It may have been panel heaters, but I seem to recal storage. The landlord is back for Christmas, so I'm meeting them 2nd jan to discuss the jobs they want done over the year.

-------------------------
Regards
Richard (Dick)

"Insert words of wisdom and/or witty pun here"
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