hi guys.. currentley have the Horstmann 425 Coronet single circuit timeswitch and the thing can lose an hour or more over a few days, so we are constantley messing with it.. can someone suggest me a replacement unit which is digital and hopefully less hassle.. many thx
Horstmann 425 coronet digital replacement
- Thread starter quinns2003
- Start date
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Horstmann H Series should be a direct replacement using the existing backplate
http://www.gil-lec.co.uk/products/H...+24hr+2+Channel+Digital+Programmer/2005970180
http://www.gil-lec.co.uk/products/H...+24hr+2+Channel+Digital+Programmer/2005970180
thx for the quick reply 
which 1 would suit my needs best or is it a case of any of the H series.. i just would like to be able to programme at least 3 times aday and what exactly does using the existing backplate mean.. this is all new to me.. thx
have seen this on amazon and wondered if this would be ok
http://www.amazon.co.uk/Horstmann-H27XL-Programmer/dp/B002LYPFH6
it does say its for hot water too but mine is for heating only
which 1 would suit my needs best or is it a case of any of the H series.. i just would like to be able to programme at least 3 times aday and what exactly does using the existing backplate mean.. this is all new to me.. thx
have seen this on amazon and wondered if this would be ok
http://www.amazon.co.uk/Horstmann-H27XL-Programmer/dp/B002LYPFH6
it does say its for hot water too but mine is for heating only
When you remove your Coronet from the wall you will find all the wiring is attached to a backplate fixed to the wall, the Coronet clips and screws onto the backplate.
It will look something like this (not sure if this is actually a Coronet)
A compatible controller clips onto the same backplate so you don't have to alter the wiring. A one or two channel programmer should use the same terminals, a 3 channel programmer may need some adjustment to the wiring.
The H27XL is 2 channel 7 days, 3 events per day and different programmes for each day of the week.
The H11 is 1 channel, 1 day, 3 events per day and every day the same.
http://www.gil-lec.co.uk/products/H...+24hr+1+Channel+Digital+Programmer/1713652715
It will look something like this (not sure if this is actually a Coronet)
A compatible controller clips onto the same backplate so you don't have to alter the wiring. A one or two channel programmer should use the same terminals, a 3 channel programmer may need some adjustment to the wiring.
The H27XL is 2 channel 7 days, 3 events per day and different programmes for each day of the week.
The H11 is 1 channel, 1 day, 3 events per day and every day the same.
http://www.gil-lec.co.uk/products/H...+24hr+1+Channel+Digital+Programmer/1713652715
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thx again for replies.. so would the Horstmann H27XL be ok as ive found one cheap on ebay
They use the same wiring. Coronet uses terminals 456 for CH changeover (5 is common/live). Diadem/Tiara use 123 for the HW changeover and 456 for the CH changeover.
The 11, 17, 21 and 27 all use the same wiring.
The 31 and 37 3 channels use same backplate but different wiring, live is not available/linked L-2-5 as 2 and 5 are used for switching.
http://www.tlc-direct.co.uk/Technical/DataSheets/Horstmann/425.htm
http://www.tlc-direct.co.uk/Technical/DataSheets/Horstmann/H21.htm
The 11, 17, 21 and 27 all use the same wiring.
The 31 and 37 3 channels use same backplate but different wiring, live is not available/linked L-2-5 as 2 and 5 are used for switching.
http://www.tlc-direct.co.uk/Technical/DataSheets/Horstmann/425.htm
http://www.tlc-direct.co.uk/Technical/DataSheets/Horstmann/H21.htm
Coronet does not have an industry standard back plate like the one in the picture and other than getting the same clock any digital will need the backplate removed and rewired.
OP best value digital would be horstman C21 ABOUT 25 QUID
OP best value digital would be horstman C21 ABOUT 25 QUID
thx once again guys for all replies.. its got a little confusing now..lol
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