Zone valve position indirect cylinder

[Mgrant]

On a heating system linked to indirect hot water cylinder (S plan plus underfloor heating zone, 1st floor heating zone and circs to hot water cylinder). Were the boiler would be in the garage and cylinder in the loft. Would it be best to have the zone valve on the flow to the cylinder in the garage by the boiler after the pump or up by the cylinder. Or does it not really matter.

 

[village idiot]

I prefer zone valves to be after the pump by cylinder

 

[Mgrant]

Thanks the pump will be by the boiler

 

[AWheating]

keep all the controls next to each other if possible to do so so near boiler and pump is good, makes wiring and pipework easier really. if the flow and return to cylinder is a long run then lag the pipework ie. treat them as you would primarys.

 

[townfanjon]

don't forget 'bypass'... after pump but before zone valve

 

[Mgrant]

Thanks so is it just personal preference? I can see the point of keeping the controls all together though.

 

[Ermintrude]

I'm always at boiler

 

[Irish]

I'm always at boiler

don't you get hot there?

 

[AWheating]

don't you get hot there?

not in his bikini

 

[Alex Pelton]

Thanks so is it just personal preference? I can see the point of keeping the controls all together though.

Not just personal preference. Much easier to have pump controls zone valves and boiler next to each other to wire and plumb up. and easier in the future to identify the fault.

 

[Mgrant]

Not just personal preference. Much easier to have pump controls zone valves and boiler next to each other to wire and plumb up. and easier in the future to identify the fault.

Thanks even with the cylinder being so far away i.e in the loft and boiler in the garage?

 

[Aquazone]

Doesn't really matter as the size of the circuit will be the same, matters not where the valve is.

Also if you mark up all valves, then if there is a fault, will be easy to fault find if you are all next to boiler, and you don't need to be running up and down into loft.

 

[Mgrant]

don't forget 'bypass'... after pump but before zone valve

A bypass will be required for each zone if each zone has its own pump like a low loss header formation. But if there's just one pump just one bypass is required before the system splits off it its different zones. Is that correct?

 

[Ermintrude]

LLH needs no bypass as it cycles through boiler. Zones off LLH when off don't require bypass unless zv is a flow temp controller and pump circulates by timer control.

 

[Whyme]

Mmmmmmmmmm lowloss.

 

[Alex Pelton]

why would you want more than 1 pump? the underfloor manifold should have its own and one the primaries with a bypass after the pump. sounds like your making this more complicated than it is.