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AuthorMessage
barneymb
barneymb

Posted: Mon Jul 23, 2012 5:35pm

Post Subject: I can smell gas from our combi boiler and the flame is yellow. Does this mean theres a leak?

Tony-B
Tony-B

Posted: Mon Jul 23, 2012 5:54pm

Post Subject: I can smell gas from our combi boiler and the flame is yellow. Does this mean theres a leak?

This is the first time I have heard of a combi-boiler on a boat. I would have thought the water wasted whilst you wait for it to flow hot would be too great. I am not qualified to advise on gas equipment nowadays but I believe your boat is potentially lethal on two counts. First yellow flames means incomplete combustion and the production of carbon monoxide - a poisonous gas. A true combi-boiler should have a balanced flue so all the gasses should be vented to the outside but although carbon monoxide has no smell yellow flames can produce an acrid smell so I am wondering about the integrity of the flue or how close it is to a window or vent. If it really is a gas smell then you have a leak and as LPG is heavier than air it will sink into the bilge of the boat where it will build up. Eventually the concentration will reach a point that any spark etc. will produce a very loud and destructive bang. One further thought. Many combi-boilers have a mains powered fan to provide combustion air. How is this provided on a boat and has your inverter shut down for any reason. Please isolate the boiler immediately and seek urgent advice from a Gassafe certified engineer endorsed for LPG work in caravans & boats. I have a horrible feeling he may have to condom the installation because of the Gassafe codes of practise but that depends upon information I do not have, just be prepared. This is urgent. Tony Brooks. PS Are you sure it is not a smell from your toilet, they can smell very similar to gas.

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