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3 TEE Rule and reverse Circulation in Multi Zone layout

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collins3248

from United Kingdom

Joined: 02 Jan 2008
Posts: 34
Location: Radnorshire,
United Kingdom

PostPosted: Wed Jan 09, 2008 8:37 pm Reply with quote

Planning new Central Heating layout to include 3 Heating Zones controlled by 2 port valves. Can I have the 3 heating zone return lines as a common or do I need to keep them separate and Tee each circuit in before the DHW return and ABV return. Are single check valves an option. I am worried about reverse circulation.
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chrishutt

from St. Pierre and Miquelon

Joined: 20 May 2005
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Location: St. Pierre and Miquelon
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PostPosted: Wed Jan 09, 2008 8:58 pm Reply with quote

How can you get reverse circulation? If zone valve is open you will get normal circulation through that circuit, if it's closed you won't get any circulation, reverse or otherwise.
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Gasguru

from United Kingdom

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PostPosted: Wed Jan 09, 2008 9:06 pm Reply with quote

Just make sure all the returns of each radiator on each zone valve circuit join together so you only have a single return pipe tee'ing onto the boiler return.
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gas4you

from United Kingdom

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PostPosted: Wed Jan 09, 2008 10:19 pm Reply with quote

I always common mine back to the airing cupboard.

I've had reverse circulation twice in the past. I ended up on one having to fit a non-return valve in the returns.
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doitall

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PostPosted: Wed Jan 09, 2008 10:39 pm Reply with quote

Not that picture again icon_lol.gif icon_lol.gif

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ollski

from United Kingdom

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PostPosted: Wed Jan 09, 2008 10:55 pm Reply with quote

plumbing porn icon_razz.gif
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DP

from United Kingdom

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PostPosted: Thu Jan 10, 2008 7:28 am Reply with quote

John you can do this where you have an open cheque book and the installation is to last a hundred years. Brillaint nevertheless

I do not fit boilers or do instals as 'customers' ask for a quote. A quote not knowing what they want. Then they want to compare prices not knowing what they are getting.
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namsag

from United Kingdom

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PostPosted: Thu Jan 10, 2008 8:03 am Reply with quote

DIA is that not over kill for a two up two down.. icon_lol.gif
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ChrisR

from United Kingdom

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PostPosted: Thu Jan 10, 2008 8:09 am Reply with quote

Oh that's the "How not to do wiring" pic, with the silly spelling mistake icon_rolleyes.gif
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doitall

from United Kingdom

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PostPosted: Thu Jan 10, 2008 5:59 pm Reply with quote

ChrisR wrote:
Oh that's the "How not to do wiring" pic, with the silly spelling mistake icon_rolleyes.gif


Spoils the whole job Chris icon_lol.gif icon_lol.gif and a qualified electrical Company did the wiring

Thats the problem Danny, Everyone wants a cheap job and to hell with the quality. However we are different icon_rolleyes.gif doit right and pay what it's worth or get someone else icon_lol.gif


Last edited by doitall on Thu Jan 10, 2008 6:03 pm, edited 1 time in total
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doitall

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PostPosted: Thu Jan 10, 2008 6:00 pm Reply with quote

namsag wrote:
DIA is that not over kill for a two up two down.. icon_lol.gif


Actually namsag it a single story icon_lol.gif

Its a good talking point in the lounge when they have visitors icon_eek.gif icon_eek.gif
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simond

from United Kingdom

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PostPosted: Thu Jan 10, 2008 6:03 pm Reply with quote

Who does the insulation, DIA, it's a very neat finish, what is it?
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doitall

from United Kingdom

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PostPosted: Thu Jan 10, 2008 6:07 pm Reply with quote

simond wrote:
Who does the insulation, DIA, it's a very neat finish, what is it?


In this case I did, but normally on big jobs we contract it out. Fibreglass lagging and plastic finish.

you buy the plastic on a roll, the corners and tees are made pieces in different pipes sizes, and the ID banding comes in a 50m roll for the different services.
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simond

from United Kingdom

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PostPosted: Thu Jan 10, 2008 7:56 pm Reply with quote

Cracking grommet.

Where do you buy it????? Or does it have a trade name, we use Climaflex they do some preformed bends glue clips etc but this looks better icon_biggrin.gif
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Onetap

from United Kingdom

Joined: 19 Jun 2006
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Location: Essex,
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PostPosted: Thu Jan 10, 2008 8:01 pm Reply with quote

doitall wrote:

you buy the plastic on a roll, the corners and tees are made pieces in different pipes sizes,


Isogenopak.
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