S plan wiring control system

[Sabnet]

I want to increase the size of the heating valve to 11/4 but the wiring on these actuators are different to the 28mm Honeywell actuators.

Does anyone know of a 11/4 valve which is compatible or what what would’ve needed to make it compatible for use in an s plan system

Thanks

 

[Sharpend]

Is there a specific reason you want to increase valve? Do you have a make and model for reference? 
What is wrong with the existing? Why not just replace like for like? Are you not just creating issues for yourself? 

 

[Sabnet]

Hi

thanks for your reply

the reason I want to increase the  valve size is that I need to increase the flow rate as I want to add additional rads.

I have sourced an 11/4 valve manufactured by

emmeti valve model is modular plus 1.5 but not sure if this is s plan compatible and if it is what mods do I need to do in the junction box

 

[Sharpend]

Well unless the property is huge, in which case it is usually divided up differently, I have never known increasing size of pipes and valves to achieve better heating in a domestic setup - commercial  and industrial aside.

 

[kerching]

Can't see a bigger bore valve making any difference

small pipe.....big valve.....small pipe

or am I reading it wrong?

 

[Sharpend]

A full explanation would help with understanding! 

 

[SPECIAL LOCATION]

I would be thinking the max bore of the pipe coming out of the boiler and through the pump would be more critical factors.. ??

(and the speed of the pump)

 

[Mark2spark]

This is a new one on me, I'd like to know how this was arrived at, as a good idea? Who recommended it as a way to go, to improve things?

An 'S' plan valve is just a straight forward two port, on or off, so the compatibility shouldn't be an issue if it's like for like. L - N - E & Sw L basically.

But the Kerching reasoning is where it falls down as an idea IMO 

I'd also say that a modern pressurised system should be able to take quite a few additional rads without changing pipe bore size.

 

[kerching]

Analogy

motorway has 4 lanes in each direction. It is getting overcrowded,solution? Make it 8 lanes in each direction for about 100m. Then knock it straight back to,4

simples

problem solved

 

[Sharpend]

So in the wet head world that would be connect radiators to the hot water pipes? No

point connecting to cold pipes. 
thus increasing pipe space for flow? 

I bet they’ve read our forum when it’s been suggestion you double up cores to meet CSA required.