Secondary return

[Ben-gee]

Oh ok, so takes .... about 15 mins in above scenario?

 

[ShaunCorbs]

Around 10 mins yes

 

[Ben-gee]

So PIR not going to be any good for this situation.
Timer best?
I’m guessing these can “learn usage” now like the immersion heaters and so on?

 

[ShaunCorbs]

So PIR not going to be any good for this situation.
Timer best?
I’m guessing these can “learn usage” now like the immersion heaters and so on?

timer could be set to constant so no

pir is the only option hence why it’s a double edge sword with plastic and why most manufacturers say no

 

[Ben-gee]

So with copper return is it normal to have pump on constant during day?
Does one put some sort of temp sensor to turn off pump when return pipe gets up to say 50 deg c?
I’m guessing cylinder needs to be on constant too , to reheat as cool water is brought back - coikk LG d get expensive pretty quick (obviously as much insulation as possible would help)

 

[exedon2]

Do a fair bit of this sort of work use tectite metal its rated for continues use easy to use as plastic not that much more expensive.

 

[ShaunCorbs]

So with copper return is it normal to have pump on constant during day?
Does one put some sort of temp sensor to turn off pump when return pipe gets up to say 50 deg c?
I’m guessing cylinder needs to be on constant too , to reheat as cool water is brought back - coikk LG d get expensive pretty quick (obviously as much insulation as possible would help)

yep temp sensor on the return these days you can get pumps with temp sensors attached so once upto preset temp it turn off

 

[ShaunCorbs]

Do a fair bit of this sort of work use tectite metal its rated for continues use easy to use as plastic not that much more expensive.

yep mlcp

 

[Ben-gee]

What do you use to lag the 15mm return?

Also the 22mm supply?

 

[ShaunCorbs]

Armaflex normally but it’s gotten a bit hard to get in the last 12 months so had to use some grey

yep the whole hot pipework needs to be lagged

 

[Ben-gee]

Use climaflex 22-25, stops things freezing but not convinced it does much more. I’ll try to get armaflex, Chuck a load of loft insulation over it for time being.

 

[ShaunCorbs]

If you want to go all out use the rockwool insulation (silver foil on the external)