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Can anyone advise on this? I am renovating a townhouse in London to include a new kitchen, 2 bathrooms, basement extension + moving two stud walls. Total cost likely to be c.120k. I don't have time to manage the project myself, and have been quoted a PM fee of 15% of the contractor costs...

Can anyone advise on this? I am renovating a townhouse in London to include a new kitchen, 2 bathrooms, basement extension + moving two stud walls. Total cost likely to be c.120k. I don't have time to manage the project myself, and have been quoted a PM fee of 15% of the contractor costs...

Oh ffs. I just don't know how it works. That is why I am asking on here. It looks like nobody else knows either, as all I get are sarcastic comments. If you can't help, please move along!

Can't really be bothered to respond to bamber, however to simplify my query: What exactly does the APS do, and what is the danger of not having it working? The boiler is not on when anyone is asleep. There is nobody within three floors of the boiler. I think it is unlikely that I will die...

I hi all I have a Keston 80 and have had problems with the burner igniting only briefly before cutting out, and going through the whole start sequence again and again, never remaining lit for more than a few seconds. i have discovered that if i remove one of the air hoses to the APS, it...

I have a Keston 80 that runs CH and HW via Honeywell zone valves and two Grundfos Selectric pumps. All have worked correctly in the past. Now, when the controls call for heat, the valves open, pumps come on, boiler blower comes on, followed finally by the boiler firing in the cylinder and...

Thanks gents. I have recharged the bubble just in case, and am now trying to heat the HW via the boiler. If it doesn't overheat, then I guess my problem is likely to be the immersion stat. If it does, then i don't know. Either way, sounds like I need to get someone in! Thanks for the help -...

I have an OSO unvented HW tank heated by an immersion heater and/or a gas-fired Keston 80 boiler. This morning I found hot water gushing from the PRV on the tank after the HW had been heated by the immersion heater (not from the boiler, though I need to check to see whether the zone valve for...

No joy. I can hear air bubble type noises running through the pump, but can't get rid of it. Not even sure if this is the problem tbh. Is there an easy way to get all the air out of the system?

Hmm - cunning plan - will go have a bash!

Yes, that crossed my mind. I have bled the pumps, but what else can I bleed on an underfloor system?? How do i get rid of the airlock? Cheers

I have a Keston 80 running two CH loops (rads on primary, underfloor on secondary) via two Grundfos pumps and two Honeywell zone valves. The primary pump is in sequence with the secondary one, and they are separated by the secondary zone valve so that unless the secondary zone valve is opened...

I have a Keston 80 boiler that fires CH and HW. Burner fires when either HW and CH are called for, but water does not heat. CH gets up to temp fine although rads do seem excessively hot, and the burner seems to switch itself off and on again every couple of minutes whether or not the...

OK cheers. Will do so.

Yes, I know about the Kestons - big job to change it though - different sized flue pipes etc mean ripping our half the ceiling. I think i am stuck with it for the time being! So you reckon it is the pump and I should just replace it? No point faffing about with capacitors? I don't know why...

Hi all - hope someone can help me here! I have a CH/HW system fired by a Keston 80 gas-fired boiler. There are two pumps (Grundfos Selectric), the first of which is situated immediately outside the boiler (the second is on a different part of the system and relates to the underfloor heating...