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True we were not there, so his 'service' may not be what I call a service. One thing he hasn't done is repaired a fault (something I class as different to a service). Someone on here must think that explosive ignition is a sign of the appliance functioning safely. James.

Correct, that's how I'd expect it anyway (not ideal for the pump). I can see that this can be confirmed with the arrow on the auto-bypass valve (provided it has been installed the correct way round). Pipework runs to radiators before returning to boiler. James.

A gas safe engineer would understand. :wink: James.

I agree with bazdaman. I'd advise you to get a second opinion. Why has he had to increase the pilot? If he had any doubts about the gas valve, he should have raised these before he left the job, not second guessing afterwards when he thought everthing was ok. James.

After some google translating and some digging, I think that connections 4 & 5 and 9 & 10 on X4 mainly concern the combination boilers. From what I could find, connections 9 & 10 on X4 allow the installation of a cold water sensor. This is mainly used for applications where pre-heated water can...

Don't know how I resurrected a 4 year old thread. :lol: :lol: I always prefer a solid base. James.

What about the ones where legs screw into the tray? James.

Solar thermal would be the way forward here. James.

Maybe that explains why so many MI's are not read by the installers? James.

An English lesson would be nice place to start for you my friend. Fitting a valve on the hot water supply (after the tee for the vent) was obviously only a temporary measure. Maybe I should remove all iso valves from underneath any hot water taps as this is a no no? :lol: As said, the valve...

I suppose you've also fitted non-return valves to the cold feeds to your 1000 cylinder installs? :lol: :lol: :lol: If you've installed 1000 cylinders, you should be asking yourself why this hasn't been diagnosed. As indicated earlier, by fitting a NRV to the cold feed, the expansion...

Seeing as you are not idiots, you will of course fitted a full bore isolation valve where the DHW tees from the expansion. Allowing you to close the valve, I.e. eliminating any exterior influences such as TMV's, mixer taps, mixer showers, etc. If problem continues, isolate the ball valve...

I'll give you a clue it's not difficult: Volume I.e. 120 litres. Secondary circulation (bronze or stainless steel) circulators (pumps) can still be fitted to a direct cylinder. James.

What's the volume of the cylinder mate? Is there a secondary circulation pump fitted? James.

Or wire the pump into a time delay relay. Depends on the installation obviously. James.

Basically a rad tail. James.

I'd have asked the kind young lady to fit it for me. :wink: James.

As said an APS fault can be diagnosed quite easily. However on the very rare occasion, one component can take out the PCB. I've had a spark generator fail at the same time as the PCB. When I get called onto jobs in situations like these following other engineers, if possible, I refit the...

Do the Atags still leak where the tube connects onto the outlet of the PRV when it has been operated? I must admit that some tundish's are appalling, they do nothing but direct the flow out of the sides. A leaking PRV as opposed to the condensate running, can be identified quite easily...

Intergas are not a new product. I look after a few older Intergas units, one being an Atmos InterOpen HE20 installed in 2005. All it has failed on is the spark generator last year. Yes they are not faultless, no manufacturer is. James.