Automatic Bypass Valve .. CLARIFICATION

[Toddyplumb]

In the dim and distant past when microbore was all the rage with TRV's it became a talking point that the one radiator was not enough of a bypass when all rads were shut it became the norm to leave off the bath trv as well .
As is said above its alll auto bypass now so is not relevant.
We still do it sometimes

 

[stevetheplumber]

another component thats not realy necessary to go wrong

 

[Bernie2]

No its only best practise not a regulation. You can throw the trvs away if you want.

Many modern boilers have integral by passes or ask you to put one in. But that is so they work correctly and keep a minimum flow going or the boiler will burn out especially the composite metal heat exchanger type.

 

[ferret]

No its only best practise not a regulation. You can throw the trvs away if you want.

Many modern boilers have integral by passes or ask you to put one in. But that is so they work correctly and keep a minimum flow going or the boiler will burn out especially the composite metal heat exchanger type.

Trv,s come under part L bypass,s come under MI,s for the correct operation of as you say

 

[moony]

It is CHESS basic practice to have:

1. Time switch
2. Room stat.
3. Boiler interlock
4. TRV's on all rads with the exception of room with stat. fitted.
5. Automatic bypass valve
   

dunno why you quoted me there - i dont see what i said thats any different to you ?

 

[plumbster3456]

There is probably no automatic bypass fitted and if there is the installer does not know the basics.
There should NOT be a stat. in room with TRV's fitted as they will conflict against each other.[/QUOTE]

explain what you mean about auto bypass... if someone fits an auto bypass to the system they don't no basics why?

 

[plumbster3456]

no comment because you are wrong I think

 

[tezzer]

You can fit TRVs to all rads if there is an automatic bypass present and the boiler/system is weather compensated. Otherwise there needs to be one rad left without a trv in the same room as the roomstat which acts as a bypass and allows correct switching temps for the roomstat.



Tezzer

 

[fuzzy]

You can fit TRVs to all rads if there is an automatic bypass present and the boiler/system is weather compensated. Otherwise there needs to be one rad left without a trv in the same room as the roomstat which acts as a bypass and allows correct switching temps for the roomstat.



Tezzer

dont know why you guys find this so hard??? the trv being left off in the room with a room stat has nothing to do with a by-pass!!!!!!!!!!!!!!!1 totally wrong
the trv is left off becuas eit can conflict, or so they say. people used to leave one trv off to act as a by-pass, now we should be fitting auto bypass valves as they are more efficient and better for the system, simpless

 

[ferret]

dont know why you guys find this so hard??? the trv being left off in the room with a room stat has nothing to do with a by-pass!!!!!!!!!!!!!!!1 totally wrong
the trv is left off becuas eit can conflict, or so they say. people used to leave one trv off to act as a by-pass, now we should be fitting auto bypass valves as they are more efficient and better for the system, simpless

you,re absolutely right there fuzzy well said