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Sorted!!! :D ...yes, Viessmann are in the wrong...I too contacted them and tech support told me they have known about the mistake in install instructions...have known about it for several months apparently and are supposed to be providing a revised sheet with installation manual...didn't...

Can it be installed horizontally?...the website pics only show it as a vertical install.

Hmmm...so basically, I......................? :? 1, Tell 'M' it's possibly as incompetent as I may be and needs to seek advice from a body that it supersedes on such matters - courtesy of Doitall. 2, Try and locate a potential Installers (CORGI of course) and find one that has no qualms...

Can you do me a favour and check the schematic of M Is for installation and tell me what I'm not seeing please....I'm getting very confused. Vitodens 100 Compact[/url]

Sorry, I hope I'm not to blame :) but, rest assured... ....I'll be back! :twisted: :P ...G-night!

If you mean the pump, yes...Manufacturer actually specifies pump to be on the flow and before the vent.

Just remembered...one last one for tonight :) ...do I need a bypass valve even though i already have a bathroom rad serving as one (straight off the return and flow from the boiler) if so, where should be situated on the system?

Many thanks guys.

Possibly...but i remember someone mentioning that it was done where head height was an issue....as it is in a single storey it may be because of that As a side issue...I'm putting my pump next to the boiler... its going to have plenty of elbows on the run as its going to come down off the top...

Ahhhhhh!!..there is always something isn't there!... Can probably cut of piece with slow bend on it and fix it further up (as I haven't got a pipe bender)....what about the 15mm feeder pipe - does that need slow bends too?...is there any relationship (distance wise) between the two pipes I need...

have you considered 'Boiler Buddy'...just got one for my system as I'm having the boiler changed...chap at plumbers merchants said his mate who is a CH system installer recently put one in and was surprised at the amount of crap it collected.

Having to re-locate expansion/feeder tank as head height is insufficient for new boiler...vent pipe (off which the feeder pipe is teed) currently runs vertically off the flow pipe and up over the tank...will have to cut it down and put a horizontal run on it and then up again to new tank level...

Cheers

Well that's sorted then!...definately want a proper one. Can you tell me what paperwork he should give on completion.

NO, not so. I believe it could invalidate the boiler warranty unless it has been fitted by a CORGI man...and the LA have to be informed of the change of boiler by a qualified person.... I just wanted to reduce the amount of work (therefore cost) regarding boiler replacement.

Hmmm...have ever come across jobs that have been done well by DIYers? I suppose also the DIYer has to trust the CORGIman's integrity in such situations too.

Why...will it be able to sniff out the dodgy joints! :? :lol: Seriously...I think I can do it...but i'm going to get a corgi man to fit and commission the boiler and will ask him to check the work out...mainly because you guys are making me nervous about it - thanks for the concerned advice.

No...no, believe me. Will be more so with the benefit of your experience...just want a considered opinon on what know what would be the best type of fitting to use.

Need to tap into gas pipe in order take 22mm feed to boiler position...need some advice please. Gas pipe to meter is vertical and right up in the corner against the walls. Need to tap into it with a T - what type of T connection is best compression, capilliary or ring solder. Are normal...