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geoff geoff is offline
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Default Vitodens 200 programmer.

In message 47c9c8e8@qaanaaq, Andy Hall writes
On 2008-03-01 17:09:31 +0000, geoff said:

In message 47c967aa@qaanaaq, Andy Hall writes
On 2008-03-01 13:24:08 +0000, "Dave Plowman (News)"
said:

I replaced my trusty of old basic electric Potterton Kingfisher
with a
Vitodens 200 system boiler some months ago. And it works just fine.
However, I miss having the external programmer of old - if I wish to
switch things off when going away etc it means going to the boiler itself.
Viessmann reckon the way round this is to use an extra external controller
- using the room stat circuit - and leave the internal one set to
constant. Which isn't really what I want. Apart from the unnecessary cost.
The integral controller has a four pin plug for everything - so I'm
assuming DC and a data circuit. Any reason why I shouldn't just extend
this and site the programmer where I want it - the cable run would only be
a metre or so. Or any other suggestions?
Other thing is the existing old programmer is mounted on a tiled surface
and if I remove it it will leave holes. And I've no spare tiles. But
dislike having an unused device left in place.
I can't see any reason why not apart from a possible warranty
issue. Can you get the connectors? If so, making up a lead would
seem to be a good way, then if you have to put the thing back you can.
Screened cable would be a good idea in case of RF pickup,
considering your location.

It's probably a relay switching inside
I don't think RF would be a problem, but surely the manual will give
an indication of what the timer does
L, N and two switch contacts would sound logical to me


I wouldn't assume that in a boiler of this type....

I wouldn't like to make any assumptions, especially as I don't know the
beast, especially following the brief description, but even quite a lot
of small, compact ones use a cap/resistor dropper from a mains supply.

"Data" also would be a very posh name for what is effectively a switch



--
geoff