Hot water

[swampydrill]

Hope someone can help me. I have a pumped system with a condensing boiler, hot water tank, pump etc. We are having problems with the hot water running out, the Central heating thermostat is obviously quite low during this time of year so the heating doesn't kick in all that often, if i put the Hot water to constant on my timer nothing happens ie Boiler does not kick in - should it ? The motorised valve for the Hot water seems to be operating and when i kick the heating on to constant the motorised valve seems to be working too.
Should the boiler kick in with the hot water set to constant even if the central heating is not required?
Is ther an issue with the Hot water side of the timer?

 

[sambotc]

Hi,

Yep should do, i would be looking at the cylinder stat first to check it's correct operation.

HTH Sam

 

[swampydrill]

The thermostat is showing 75 deg, i did turn it up but the boiler still didn't kick in.
If it was a faulty thermostat then i guess it wouldn't work when the heating kicks the boiler on either, but when the boiler kicks in for the heating, we also get the water heating up as it should.

 

[Bambergaspipe]

Does the fan in your boiler come on when you open the Hot tap?

 

[swampydrill]

To be honest i wouldn't know where to look for that

 

[gas4you]

If boiler is working ok on ch then should not be a fault with boiler. I would be looking at the h/w zone valve. You may hear the motor turning but I would think its the microswitch gone that is activated to supply poer to the boiler and pump. Change valve head

 

[namsag]

Bamber pray tell us why his fan would come on if hot tap turned on.

As gas4you says probable valve head faulty or wiring fault

 

[swampydrill]

Thanks
I must admit i have had2 valves changed in the 14 years i have lived here and that was my first thought, can you remove the covers on these landis and gyr valves to acces valve without removal of valve

 

[swampydrill]

The valve is a landis and gyr model V222, can parts be got for this if it is just a head that needs changing?

 

[sambotc]

Can you remove the head and operate the spindle manually, not familiar with the valve but does it have a lever on the side which allows you to do this without taking the head off

Sam

 

[swampydrill]

Yes it does have a small sliding lever on the side that seems to operate, if this valve was knackered and not actually opening the valve, why am i getting hot water when the boiler comes on with the CH.

 

[corgiman]

Yes it does have a small sliding lever on the side that seems to operate, if this valve was knackered and not actually opening the valve, why am i getting hot water when the boiler comes on with the CH.[/quote


cos its stuck

do you have one or two valves?

 

[swampydrill]

2 valves

 

[corgiman]

then the hotwater one is stuck open, and does not power around enough to hit the microswitch

change it

 

[swampydrill]

can you buy replacement heads for landis and gyr model V222, can't find any on the net?