No Hot Water

[AGW1]

HI Chaps,

I recently changed a radiatior refilled the cylinder etc fired up the boiler and the rads are all working fine but I have no hot water, the cistern filled OK this is an old system and it has two two way diverter valves. When I switch the time clock to hot water only the first diverter valve operates ok but the second does nothing, hot water is getting past the first diverter up to the second but not past it, everything was fine before I changed the radiator, the manual lever on the second diverter is doing nothing if I move it back and forth any ideas

 

[Hugh Jaleak]

Switch the power off and try the 2nd valve. These usually power open, spring return to closed, if its open then you may not find any resistance.

Strange to have one after the other, usual set up if its a S plan system, is 1 for CH other for HW. Flow will 'T' off to each valve after the pump.

 

[AGW1]

Thanks Hugh will try tomorrow bit late now

Cheers

Allan

 

[Hugh Jaleak]

No worries. My insomnia has returned unfortunately....

 

[matt1e]

Strange to have one after the other,

not if its an unvented cylinder!
if it is the second 2 port (after a mid-valve) then it may be closed because
a) its broken
b) its locked out due to safety reasons

try to reset the overheat stat on the cylinder and see if it works
if works but repeatably trips out after reset then you have a problem
do not overide the valve and use it

matt

 

[AGW1]

Thanks Matt will try that.

Cheers

 

[AGW1]

Hi Matt

Just had a look there is a small what looks like overflow tank near the main cistern I have had a look at the cylinder looks like a pipe going into the loft to this small tank from the cylinder cant see any pressure release valves or similar on the cylinder

Allan

 

[AGW1]

Sorry me again Matt

Managed to clear the problem with the diverter valve (slight tap with a hammer frred it, it is working fine now the hot water is getting to the cylinder (red hot) but no further still no hot water, I thought maybee the coil has had it in the cylinder what do you think?

Cheers

Allan

 

[Hugh Jaleak]

Possibly air locked or blockage. I would suspect latter, if its an old system and hasnt got inhibitor in it, then sludge could be a problem.

I stand corrected! If it is an unvented system, you will need someone with a G3 certificate to look at it for safety reasons.

 

[AGW1]

Thanks Hugh

How can I tell if it is an unvented sustem

Cheers

 

[Agile]

Look for names and specifications on the cylinder or post a photo of it.

Tony

 

[AGW1]

Cgeers Tony

Nice of you to post

Regards

Allan