Horstmann C27 temporary "by-pass" fix-help

[ekon]

C27 has definitely gone..a new one has been ordered but we may have to wait a few days given Xmas post etc. Its pretty cool in the house!

Saw an old thread about this programmer which included how to temporarily by-pass the internal switch in the programmer (just for a few days til the new one arrives) ...one poster ChrisR suggested:

"You could use wire to connect the appropriate pins oin the backplate to bring the CH/HW on pro tem. I have one here - connect L to 3 and 4

So you just whip the front (business-end) off the backplate, note/mark which are the slots on the backplate for pins 3 and 4 on the programmer and join them with wire?

what sort of wire please?...could you use a pair of mini-insulated-crocodile clips?

You leave the front panel off yes? I only need CH from the boiler as hot water can be got via immersion heater
any other advice gratefully received..thanks for reading.



Read more: //www.diynot.com/forums/viewtopic.php?p=134584#134584#ixzz2Ef7lNxxh"

 

[TheGasMan26]

Isolate the power, remove programmer and look on back of it, that will tell which terminal does what-ie-3=hw on-Get a small length of core(the 3 smaller wires inside) from a normal wire for 3A appliances(any flex off a lamp etc) and put 1 end into L terminal on backplate and other end into ch on and anokther into hw on from ch on(i think it 3&4 but it will say on rear of programmer), replace front and turn power on.

To get the wire snip a bit of flex of any household appliance, strip open and take 1 core(with insulation on), cut to length and strip the ends.

Above all work safely and ensure all electrical work is done dead or it may be you that ends up...

 

[TheGasMan26]

No dont leave front off, it will be alot safer to put front back on and pointless to leave it off.

 

[petertheplumber12]

From left to right terminals are neutral live 1 2 3 4 1mm2 lighting cable will do single strand a bit bared both ends

 

[ekon]

thanks everyone ..most helpful.

The power supply to the programmer is from a standard 3-pin fused plug (into a single dedicated socket ..out of sight in the nearby airing cupboard)..so no worries there ..the plug will be out and on the floor!

As I only need CH.. just one piece of wire then... between live and 4. ..then the frontplate is re-attached for safety reasons.

I have found the Horstmann installation guide..it's here..for anybody else:

http://www.horstmann.co.uk/downloads/ElectronicDocuments/Central-Heating/C21-InstallerGuide.pdf


of the numbered pins - 1 is HW off, 2 is CH off, 3 is HW on& 4 is CH on.

much appreciated[/url]

 

[gas112]

If you have not ordered already check plumbcentre out as they have some of this horstman range on offer

 

[ekon]

thanks for the info gas112..have already ordered..paid £26 delivered..will have a look anyway.

 

[gas112]

Thats a very good price delivered

 

[ekon]

Ebay trader but I think (?!) ok....has a good rep anyway!

Where does one stand when buying new (blister packed..unopened/genuine) parts off Ebay in a private auction with an individual? (I think Horstmann do a 2 year warranty) IF it turns out the unit was manufactured..say..6 years ago & has been on a shelf for the duration!??.

My purchase on Friday last was from an Ebay shop..not a private auction..does warranty still hold if it turns out to be stock that was bought up from a bankruptcy for e.g...and the manufacture date was (let's say) 2007?

Why do these programmers etc fail..resistor/capacitor failure?..a 2p Chinese component? (no disrespect he added quickly)..can the front end be repaired? (maybe a very silly question!!)

I put in the boiler (28 sec. oil-fired) in 1987..British made in Shropshire by Mistral. One new Riello (yes Italian!) burner unit fitted about 8 years ago when the bearings on the original gave out..still runs sweet as a nut (hope that's not tempting fate...note to self..it probably is..its Winter!)

Original programmer was a Honeywell..when it failed after 20 years it was so old I could not replace like for like so went for a Horstmann..the first one lasted about 5 years ..its replacement cost £8.50 delivered.. in a private Ebay auction..that was in April this year!! I don't know the manufacture date!!

Are Horstmann programmers "crap"?..as someone so eloquently put it on another website?.p.s. I know that generally you get what you pay for.

As the programmer is run from a socket (ie plug/socket) would putting a surge-protector in-line be a good move?