Recent content by dradambbb

Secondary pump HW makes sense. (Ignore my second post too :) ). Noted about the associated dangers. Note that the HW to the monsoon pump goes down the pipe with the green arrow.

ignore

I have an issue with HW being drawn when all taps are turned off. This is manifested by the Stuart Turner Monsoon pump which runs on when HW is turned off at the tap. When I close off the main HW supply (green arrow), the Monsoon pump stops as required. At the same time there is still a trickle...

This is just a follow-up to say that the problem has been solved today. Thanks to Agile's initial advice I purchased a new 3-port Honeywell mid-position zone valve, drained the tank and the boiler (mostly on the floor, ahem, :roll: ), removed the old unit and fitted the new. Draining the...

The set-up is one 3-port Honeywell ZV sitting on top of a pump and one 2-port Honeywell ZV sitting on top of another pump. For the 2-port set-up (going from water tank to under the floor) neither CH nor HW operates it. However, the ZV seems to operate fine in terms of lever resistance: no...

Thanks, Tony, Will be checking the zone valves tonight.

Thanks for the responses so far. Incidentally here's the manual http://www.partsarena.co.uk/baxi/System/DATA/Dx/DS1/installation/2508/I19-2508/I19-2508.htm I will check the zone valve. Does its state form an input to the boiler electronics? Can't see it in the manual. There is one room...

Hope knowledgeable people can help on this one as they have in the past. Thanks to this list I've fixed at least 2 boilers. Recently moved into a place with this oldie but goodie boiler which worked fine for HW and CH till a few days. HW is still fine - coming on/off from the Honeywell...

Now now boys, let's not get into scrap :) Placing a knife (or long screwdriver as you say) against the various components to check-out for the source of the resonance has been tried. It doesn't appear to be the pump but could be the diverter - it's a bit harder to get to with the...

Thanks for your replies. So far I gather that it can be anything and everything. Any suggestion for practical diagnosis steps one might take to reduce the set of possibilities? One thing I've read is that one could try shutting off all TRVs to see if makes a difference. I've also read that...

Whoops. Please ignore my post - wrong forum.

This has recently developed with noise being heard in every room of the apartment. Symptoms: Turn on CH and let it run - absolutely fine for hours. Then I open HW for a few seconds and shut HW off. Now this combi boiler begins to hum. When HW is turned on the noise goes away until the tap is...

This has recently developed with noise being heard in every room of the apartment. Symptoms: Turn on CH and let it run - absolutely fine for hours. Then I open HW for a few seconds and shut HW off. Now this combi boiler begins to hum. When HW is turned on the noise goes away until the tap is...