I have a Vaillant Turbomax that is becoming annoying every now and then it decides to make an explosion banging kind of noise, could this be because the Trv's are all set quite low or that there is no inhibitor in the system.And sometimes the boiler decides to lock out and the red light comes on and the F.28(No gas supply) comes on the display but when I reset the boiler it works merrily for days and days and the last time it locked out was in the summer.
PS, The previous problem (Boiler losing pressure) I had was easily fixed with Fernox leak sealer.
The F28 is not no gas (although no gas will cause F 28). It is ignition failure after repeated attempts. That coupled with the bang says that the boiler is not always lighting. Sometimes it locks out, sometimes it catches the gas with a bang.
Get the boiler competently serviced. That means cleaning, setting, adjusting and replacing bits as needed.
but the boiler will be serviced by a Vaillant appointed engineer.
The bangs only started yesterday but the F.28 used to happen before (Only about three times) The first and second times it was reset it would lockout after a day or two, and the third time it was reset it never happen again, I'm very happy with this boiler though,after having a Biasi in the previous house which had 2 heat exchangers replaced for both Ch and Dhw and it also had many other problems.
Ed what are your opinions of the newer Vaillant ecoTEC,the open vent version has an excellent modulation range. (Well thats what I think)
To get 38kW you will need a short fat pipe from the gas meter. I am generally happy with Vaillants. One question that is forming in my mind about all condensing boilers is their propensity to collect gunge in the drain/trap. This may turn out in time to be a really significant design feature/flaw.
I now see many condensing plumes from terminals in inappropriate locations on the sides of blocks of flats, etc. Cowboys get the cheapest deals and fit them. This is going to cause conflict. I also see condensate drains to outside onto concrete paths, etc.
My next door neighbor has a 11 and a half year old Vaillant ecoMAX boiler it plumes so much that it floods there alleyway, but they do not mind and I quite like the look of the thick plume on a cold day. So if a condensing boiler is set too high little plume will be visible? Does the plume become less dense if the boiler is being operated for long periods at low flow temperatures?
The amount and density of the plume depends on the operating temperature and power output of the boiler, plus the flue length and heat exchanger design. It's weather dependent as well.
It will be most visible and voluminous when the boiler is going at full tilt with the fan running at max speed and the water being heated. It will be low when the boiler is running at low power levels even if at low temperatures.
What do you mean by full tilt? I'm getting confused, someone tells me that plume will be more visible when boiler is running at low flow temperature and someone tells me it wont be so visible when at low temperature.
Full power output - e.g. when heating the hot water (either as a combi or reheating a cylinder)
The plume is visible water vapour. This means that it has condensed to very fine water droplets.
- It will be more visible when the air temperature is cold - eg. this time of year.
- There is more water vapour produced when the boiler is operating at high power levels because more gas is being burned.
- If the water temperature in the boiler heat exchanger is low, more of the water in the form of steam produced by combustion will condense inside the heat exchanger than if the heat exchanger is warmer. It is the change of state from gaseous (steam) to liquid (water) that releases the latent heat that produces the improved efficiency curve when it happens.
However....... the liquid state is
- what is deposited inside the heat exchanger and finds it's way to the condensate trap and drain
- what is deposited in the flue and also finds its way back to the inside of the boiler
- what leaves the flue in the form of a visible plume.
So there is a factor in how *much* is produced as well as the temperature of the boiler and the temperature of the outside air that affects what you will see.
Has anyone heard a Keston boiler in action? I have and the flue or air intake is very noisy, in previous house a neighbor had one, we could hear it from inside.
This isn't the case with my C25 -- it's not silent, but not particularly noisy either. The boiler itself is more noisy than some from the indoors. I wouldn't want it in a bedroom, but it's no problem in a bathroom.
Ed Sirett wrote in news:flgsa3$ppl$7$ snipped-for-privacy@news.demon.co.uk:
I have the C36. It certainly not silent, but then I've heard other makes which are about the same.
Mine is fitted above the cistern in the downstairs cloakroom. Also fitted is an extractor fan (there are no windows). The extractor fan is noisier than the boiler fan.
However, the boiler does fire up with a 'whoomph' - and that can be heard next door, but not the boiler itself.
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