Vitodens 200 programmer.
On 2008-03-01 17:09:31 +0000, geoff said:
In message , "Dave Plowman (News)"
writes
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
why DC ?
The Saunier Duval programmer is 24vdc powered, but almost every other
one I've encountered is mains powered
Mine's 0, 12v and then 2 way data on a single wire......
The controller handles time, signals temperature as an actual reading
and allows control of the relative sensitivity of the room temperature
vs. the weather compensator.
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