H/W Tank Thermostat

[Greenbeast]

We don't appear to have a tank thermostat
The boiler cycles when producing hot water but i guess its just using its own thermostat.

If i buy a tank thermostat, how do i go about wiring it in?

Thanks

 

[seco services]

depends what system its on.

 

[Greenbeast]

We've got an ancient back-boiler controlled by a danfoss controller (FP715 i think)

 

[seco services]

is it gravity hot water or fully pumped.

 

[Greenbeast]

well there is only one pump that i can see, next to the boiler

 

[seco services]

sounds like gravity hot water.
i take it you can only have heating with hw on as well

 

[Greenbeast]

yes that is true, it's either h/w or both

as an aside, would it be better to be able to have just heating?
am i right in thinking the hot water produced by the boiler goes through the dhw tank before the radiators, or am i completely off the track there?

if true, would the heating react quicker if it wasn't heating the dhw?
but then i don't think i'm ready fopr the disruption and expense of that just yet

 

[seco services]

you can convert it to a c plan system and have control over hw

if you place the zone valve in the cylinder return, then you can have a cyl stat

 

[Greenbeast]

I'm not prepared for the cost disruption of changing pipework right now

regarding the tank thermostat, is it possible for me to fit one and if so, how do i go about it?
I've googled but can't find a whole lot of information.

 

[seco services]

you can't have the stat on its own it won't shut the water off when up to temp.

 

[Greenbeast]

ah right, so you can only have a tank stat if you have independant dhw and ch?

how much work is involved in changing to a c-plan?
i guess everything needs to be drained out (including water tank in roof?)

 

[seco services]

ah right, so you can only have a tank stat if you have independant dhw and ch?

how much work is involved in changing to a c-plan?
i guess everything needs to be drained out (including water tank in roof?)

yes you need to drain system to fit zone valve then just wiring.

 

[Greenbeast]

ah ok, so literally just a cut in 1 pipe and a valve fitted and the rest is wiring

 

[seco services]

yep