no hot water from indirect tank .help needed

[LAMI]

hi,all
I have an indirect unvented tank for hot water, but no hot water getting to coil inside,system boiler, heating all else,underfloor heating,no motorised valves, I have drained system,disconnected coil put a hose inside coil and flushed,refilled system, removed air, no success. any ideas??: i am using the immerser in tank just now.sweatdrop:
(joiner)

 

[Best]

Hello and welcome. Do check you have no motorised valves with cylinder stat (most systems now have them somewhere) or thermostatic valve for cylinder jammed closed.
Other thing it can be is a gate valve broken or shut down - it can be there as a balancing valve.
Other option is dirt in pipes to coil, which is more likely if it was a previously open vent system

 

[LAMI]

thanks,defo no valves,no gates,wasnt open vent, had new boiler fitted,6m ago, all working fine till now, prob need flush whole system.?

 

[LAMI]

if i open sludge valve and flush with filling loop will this do it?

 

[stevetheplumber]

unvented cylinder will or should have a motorised valve and to work on one you need to be registered

 

[LAMI]

thanks,but defo no valves,as i have moved boiler from orginal place.i know its strange but thats the way system was installed by orginal owner so you get free hot water as it heats underfloor heating,

 

[lame plumber]

if it is unvented and no motorised valves there are serious safety issues, get someone in to look and make safe

 

[stevetheplumber]

no lame its all right his a joiner

 

[Riley]

I sense a wind up

 

[Best]

I missed the word unvented! Definitely should have a motorised valve for the unvented cylinder (they all come supplied with one as part of their safety parts)
Get a G3 qualified person to take a look at it, and while they are there tell them to service it, as it must never have been installed or serviced before by anyone who knows what they were doing.