new split zones

[buckley plumb]

with regards to the split zones - if i fit a combi and split the up and down stairs as seperate zones then here is the problem -if i come off the boiler and straight away split the flow and put a zone valve on each of the flows then there is no bypass or open flow to give the min flow and rtn temp -this is no problem with a normal boiler as the pump is normaly in the airing cup and the bypass fitted here so will get min flow .i can see lots of combis giving problems when zone valves are fitted as they will be right next to boiler .anyone got any thoughts

ant

 

[GQuigley67]

if the boiler doesnt already have a bypass built in then fit an automatic bypass valve

 

[buckley plumb]

if the boiler doesnt already have a bypass built in then fit an automatic bypass valve

know what you are saying but some boilers req bypass to be 2m away at least.do terrace houses have to be zoned now.

ant

 

[AWheating]

yes, terrace do need to be zone........ if the building control are looking.

if you zone up and down and bath is up then does that mean you have to sit on a cold toilet during the day?

 

[buckley plumb]

yes, terrace do need to be zone........ if the building control are looking.

if you zone up and down and bath is up then does that mean you have to sit on a cold toilet during the day?

its mad now - next it will be each room using an u floor manifold to run rads

 

[sheff paul]

I had this out with a few boiler manufacteruers last week ,some of them were quite frankly sticking their heads into the sand on this.Just put 2 zone valves under the combi with a 22mm auto bypass,try and keep them as far as possible away,not always easy i know.If the heat exchanger buggers up in 2 years ''thats life''.Its up to the boiler manufacteruers to ''man up'' and start putting a clear guide in the MI's