what heating plan??

[cpm25]

Untitled

• cpm25
• 17 Mar 2012
• 1

can anyone tell me heating plan this is, these are no stats, just a 2 port 6 wire motorised valve which seems to be on the flow of the boiler, i thought it was a cplan, but there are only one flow and return to boiler. sorry about the drawing any advise appreciated

 

[gaswizzard]

No room stat?

Usually known as a 'plan 2' (without the MV) , ad-hoc you might say.

 

[Dan Robinson]

Your flow and return to the cylinder are the wrong way round.

 

[simond]

This is fully pumped system with a mv to turn off the heating. I assume theres a dual channel programmer, very hot water at all times.

Demand is dictated by programmer and boiler stat. Prime candidate for conersion to an S plan.

To answer your question, it doesn't have a 'plan', but these were only given names to help domestic installers. Dont let the fact it has no scheme name concern you. Needs updating, imho.

 

[Dan Robinson]

Can't see the pump... I'm on my tablet.

Must stop commenting on photos unless I am in the office.


So yes, a C-plan has gravity HW. So if things are as Simon says (boom boom) then it isn't a plan... it is just a bit of a mess and needs updating to either S or Y-plan.

 

[mickyg]

its a bad conversion to fully pumped is what it is. Thats gonna be a corosion fun day.

 

[cpm25]

yes thats my problem dan water is too hot, to convert to s plan would i need to replace the f&e pipe from loft as this wouldnt be possible, or is that not the case?

 

[cpm25]

This is fully pumped system with a mv to turn off the heating. I assume theres a dual channel programmer, very hot water at all times.

Demand is dictated by programmer and boiler stat. Prime candidate for conersion to an S plan.

To answer your question, it doesn't have a 'plan', but these were only given names to help domestic installers. Dont let the fact it has no scheme name concern you. Needs updating, imho.

so could i add a mv to the flow to cylinder to get control of how hot water gets, and wire like an s plan

 

[simond]

Yes, but you would need to make the cold feed and vent arrangements correct.

If your boiler has pump over-run you would also need to fit a bypass, such as a Honeywell DU144.

 

[cpm25]

Yes, but you would need to make the cold feed and vent arrangements correct.

If your boiler has pump over-run you would also need to fit a bypass, such as a Honeywell DU144.

no pump over run, what needs making right with the feed and vent, would the mv valve be best placed after the vent pipe. i really dont want to start re-piping cause boiler will be replaced when funds allow, but would like more control over water and heating to have one with out other etc.

 

[DP]

Present setup will suck air big time. at the top cylinder connection

 

[cpm25]

Present setup will suck air big time. at the top cylinder connection

i think i have drawn it wrong long time since was in loft, it all works fine normally appart from the lack of controls, anyone no of a goog site to look at pipe layout, need to no wheres the best place fo mv. and need hot water on its own and vice versa.

 

[kevindgas]

doesn't look wrong to me, it looks like an old W plan but with the pump the wrong side of the return tee. (but i can't see the drawing very well!)

 

[Ihavenojob]

Depending on the boiler,you could seal the system,put the pump on the flow & use a 3 port valve.

 

[cpm25]

doesn't look wrong to me, it looks like an old W plan but with the pump the wrong side of the return tee. (but i can't see the drawing very well!)

its really hard to work out how this works, i presume the mv controls the heating, but can i put a mv to control hw.