F25 is explained on page 49 of the Installation Manual.
Glow worm Ultracom 30sxi.......no heat to radiators!!!
- Thread starter Hoody155
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Sorry to be a pain, but which bedroom?
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The total output of your rads is about 9 kW!!
But the output of your boiler can vary between 5 and 28 kW.
Who said you needed a 28 kW boiler??
What we don't know is if 9 kW is sufficient to heat your house. You can find out by using the Baxi Boiler size calculator. Rads need to match the boiler so, if the calculator says you need a 15 kW boiler, you need 15 kW of rads. You could put in more kW of rads, but not less.
But the output of your boiler can vary between 5 and 28 kW.
Who said you needed a 28 kW boiler??
What we don't know is if 9 kW is sufficient to heat your house. You can find out by using the Baxi Boiler size calculator. Rads need to match the boiler so, if the calculator says you need a 15 kW boiler, you need 15 kW of rads. You could put in more kW of rads, but not less.
We only purchased the house about a month ago, I believe the boiler was installed in late 2010.
Ive just had a quick look at the link you gave and its come out at 13.6KW. Are you saying that if we were to add more rads or upgrade the existing ones then that will help? We are having some work done downstairs which includes adding a radiator in the kitchen and a towel rail in the downstairs bathroom......will this help?
Ive just had a quick look at the link you gave and its come out at 13.6KW. Are you saying that if we were to add more rads or upgrade the existing ones then that will help? We are having some work done downstairs which includes adding a radiator in the kitchen and a towel rail in the downstairs bathroom......will this help?
If the boiler is rapidly cycling while the water temperature on the return is still relatively cool, as are most of the radiators, there is just not enough water circulating through the boiler.
Can you open the motorised valve manually to at least try and eliminate that being faulty? And if the pump is a three speed unit maybe try switching it to max.
Can you open the motorised valve manually to at least try and eliminate that being faulty? And if the pump is a three speed unit maybe try switching it to max.
How old, approximately is the house? Probably quite old from the type of rads installed.
The additional rad and towel rail will, obviously, increase the heat provided to the house. But it will not compensate for the discrepancy between boiler output and rad output. I suggest you adjust the output of the boiler to, say 15kW, using parameter d.0 (pages 49 & 50 in Manual). Then monitor what happens.
When "The Gas Board" was a monopoly, gas was cheap and insulation and energy efficiency were unknown.
Yes. It's just a case of pressing a few buttons on the boiler, as explained on pages 49 and 50 in the Installation Manual.
Update........
Unfortunately it doesnt seemed to have made much difference. We are still having the same problem as before in that the majority of radiators take a good few hours to heat up and even then they dont fully heat up and some hardly at all. We had the room thermostat to 20c last night, however the CH never reached that temp so stayed on for the whole evening.
The last plumber who came out said that he thought changing the valve may sort the problem of the radiators taking so long to heat up......does this sound like a possibility?
Unfortunately it doesnt seemed to have made much difference. We are still having the same problem as before in that the majority of radiators take a good few hours to heat up and even then they dont fully heat up and some hardly at all. We had the room thermostat to 20c last night, however the CH never reached that temp so stayed on for the whole evening.
The last plumber who came out said that he thought changing the valve may sort the problem of the radiators taking so long to heat up......does this sound like a possibility?
Is the boiler temperature still going up to 75 then dropping; and so the cycle continues?
If the heating works better when the HW is off, it suggests that the system has not been properly balanced.
Do you have thermostatic valves (see pic) on the radiators?
View media item 84726
If the heating works better when the HW is off, it suggests that the system has not been properly balanced.
Do you have thermostatic valves (see pic) on the radiators?
View media item 84726
When the heating is switched on from fairly cold, how long does it take the boiler to reach the temperature at which it trips OFF ( 75C ? ) and how hot does the return pipe feel when this happens?
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