Horizontal cylinder, thermostat not operating.

[andyjspark]

Wiring up a system with 3 zones 1 for UFH 1 for Traditional rads 1 for HW first 2 work perfectly, Thermostat for HW will not operate when placed in cylinder pocket but clicks on and off when held. Any suggestions as to fault would be appreciated.

 

[TCCHeating]

More info on the thermostat and hot water setup needed please. Pictures would be nice

 

[andyjspark]

system boiler, unvented cylinder through a 2 port valve controlled via a programmer and non functioning thermostat.

 

[andyjspark]

stat constantly calls even though HW is raging hot but when i remove the stat it clicks off from the warmth of my hand.

 

[Steelmasons]

At what position is the stat situated in the tank?

 

[andyjspark]

at the bottom, my thinking is it isn't getting warm enough to be satisfied but have not idea how to remedy it.

 

[Steelmasons]

Does this stat use a phial that sits into a pocket?
If so the cylinder has been positioned to the wrong orientation or possibly not intended to be installed in a horizontal position.

 

[andyjspark]

its definitely a horizontal cylinder and has been installed correctly, as per instructions, although i didn't do the plumbing only being a lowly electrician. its a dual stat with an upper limit cut out combined. it has 2 probes out the back that sit inside the cylinder pocket.

 

[Steelmasons]

Who is the manufacturer?

 

[andyjspark]

Telford

 

[andyjspark]

http://www.directheatingsupplies.co.uk/pdfs/Telford Tempest + Tornado Guide.pdf

 

[andyjspark]

page 14 for the horizontal setup.

 

[jeff the gasman]

Have you wired it correctly?
Does it have a satisfied switch on the stat?
Not criticising, just asking.

 

[andyjspark]

definitely wired correctly, as i said the stat was operating with the heat from my hands.

 

[jeff the gasman]

The heat from your hand would not operate any hot water stat. Afaik.
Unless massively out of range.