Hi, experts. Our boiler is a Vaillant sealed-system combi (an EcoTEC 824, about five and a half year old). It is now out of guarantee. There are only three radiators running off it, and they are all quite small (3ft 3inches, 2ft, and 16 inches long by 2ft high, respectively — the rest of the house is heated by gas-fires and electric heaters). When the installer set our system up, he said that, in view of its modest heating demands, he would adjust the boiler, to take this situation into account. All of the above is just background to two questions I should like to have answered.
Question 1) Because of intermittent ignition faults (which two engineers, on two separate call-outs, have not been able to cure), it has been necessary for me to switch off and restart the boiler, several times recently. The other day, thinking that it may cure the ignition failure problem, I re-set this boiler, by pressing and holding in the power button for one second, then re-starting it, as instructed. With respect to this, my question is — did this re-set also negate the boiler settings laid down by the installer, so that, now, the boiler does not take into account the modest heating demand? Or not?
Question 2) Yesterday, I felt there was a need to raise the DHW temperature, so out I went, with my instruction card, and pressed the relevant buttons. What I did not realise, until later, was that the display said, not DHW, but Target Flow Temperature. A day or so later, when looking through the manual, I realised my error. However, I could not remember exactly what the former Target Flow Temperature setting had been, so, later on, when trying to set things right, I reduced the Target Flow Temperature setting, without knowing whether I had set it back aright. I think the setting was left at about 58°. When I went out to check it, I could not find it!
Can anyone tell me what the Target Flow Temperature setting ought to be for this boiler, having in mind the fewness of our radiators? (I have spent far more than I can afford on engineers coming out to try to correct the ignition failures, without success. So, being a pensioner, I cannot afford to ask anyone to come out again.) Please advise me. Answers to both questions would be greatly appreciated.
With thanks in advance,
A.W.
Question 1) Because of intermittent ignition faults (which two engineers, on two separate call-outs, have not been able to cure), it has been necessary for me to switch off and restart the boiler, several times recently. The other day, thinking that it may cure the ignition failure problem, I re-set this boiler, by pressing and holding in the power button for one second, then re-starting it, as instructed. With respect to this, my question is — did this re-set also negate the boiler settings laid down by the installer, so that, now, the boiler does not take into account the modest heating demand? Or not?
Question 2) Yesterday, I felt there was a need to raise the DHW temperature, so out I went, with my instruction card, and pressed the relevant buttons. What I did not realise, until later, was that the display said, not DHW, but Target Flow Temperature. A day or so later, when looking through the manual, I realised my error. However, I could not remember exactly what the former Target Flow Temperature setting had been, so, later on, when trying to set things right, I reduced the Target Flow Temperature setting, without knowing whether I had set it back aright. I think the setting was left at about 58°. When I went out to check it, I could not find it!
Can anyone tell me what the Target Flow Temperature setting ought to be for this boiler, having in mind the fewness of our radiators? (I have spent far more than I can afford on engineers coming out to try to correct the ignition failures, without success. So, being a pensioner, I cannot afford to ask anyone to come out again.) Please advise me. Answers to both questions would be greatly appreciated.
With thanks in advance,
A.W.