Gas boiler thermal store problems

GHD

Joined
19 Jan 2011
Messages
4
Reaction score
0
Location
Clwyd
Country
United Kingdom
Hi

I have had a heating and hot water system linked to a wood burner and gas boiler via a thermal store. The wood burner works fine, but the gas boiler fails to heat the thermal store adequately. The gas boiler heats water for 1 -2 minutes and then cuts out for a period of several minutes before heating the water again. This is does not heat the thermal store adequately via the 15 KW heat exchanger. The installer seems confused by the problems!

Any help would really be appreciated.

Thanks
 
Sponsored Links
What boiler, what thermal store , what controls do you have ? a bit more info will go a long way ;)
 
  • Thanks
Reactions: GHD
The boiler is a Baxi Solo 15 HE

The store is a Newark SolarCyl Vented (96 Ltrs heated by boiler)

Control is a Drayton LP 711 limited to heating system, otherwise boiler should always maintain store at temp (50 C) but I not sure what controls this - would it be the boilers own internal systems? The boiler's water pump runs continuously until temp is reached but the boiler fires up for short periods and has long periods of not firing (pump running).

Cheers
 
Could be a number of things - but staring at the most obvious
What setting are you running the boiler thermostat at?
Servotech,
 
Sponsored Links
I've turned the flow thermostat up to the maximum but it appears that the boiler cuts out when the return temp warms up.
Thanks.
 
I've turned the flow thermostat up to the maximum but it appears that the boiler cuts out when the return temp warms up.
Thanks.
Isnt it supposed to cut out through high temperature? are you pumping water from the store through the heat exchanger?
 
Sounds like a circulation problem.
Could be a air lock or valve stuck in the off position even a blockage in the system.
Have a look to see if there are any hidden air vents in the cylinder cupboard that may need venting.
 
The auto vents are working and water is flowing so I think the valves must be opening.

The water from the boiler passes through a heat exchanger located inside the thermal store.
 
Baxi solo has a built in flow switch, so if no flow it wouldn't fire, so if it's firing and return is hot and up to temp, them what Onetap says would sound right.
If the store has numerous tappings for the woddburner etc, are you sure the boiler is connected to the correct connections ?
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Back
Top