In article
,
stevelup wrote:
On Mar 3, 9:30 am, "Dave Plowman (News)" wrote:
In article
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You need Part No. 7133 385 according to the installation manual. This
is a wall mounting adaptor plate for the controller and includes a
blanking plate for the front of the boiler.
Maximum cable length is 30M and you need 2 core cable apparently.

Spoke to Viessmann this morning - what a breath of fresh air getting
straight through to a bloke who obviously knew the things inside out -
when asking for technical advice.

The part number you gave is correct for earlier units but it seems
can't be done with current ones. What they do supply is a slave unit
which looks the same and duplicates all the operational features of
the main one which stays in place - all it doesn't do is allow access
to maintenance and setup codes/features.

It does indeed work on only two wires and it's a Vitotronic 300 with
a part number 7248 907 - this is for the weather compensated one.

Good stuff. Is it expensive?

Yes. It's Viessmann. ;-)

About 80 quid.

--
*Cleaned by Stevie Wonder, checked by David Blunkett*

Dave Plowman London SW
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