Recent content by kktoday

This boiler is locking out occassionally. The problem is the differential valve moving a little too slowly and not always opening the gas valve in time. I have stripped and cleaned the differential valve with initial success but now the problem is reoccurring. Does anyone have any advice? Thanks

update - eventually located the problem to a mass of what looks like flux at an elbow. A tarnished green blob almost an inch long almost entirely choking the pipe. I have no idea how the boiler was ever commissioned. The confusing part is the report of deteriorating hot water performance. Can...

Never used it but I like the sound of it. Maybe worth considering. I imagine it as a more rigid version of PEX - or is it more flexible?

Could be fun. Converted flats. My view is if you're running new gas pipe then why not put in 22mm.

Shouldn't drop like that but is. Yes for sure working P at inlet. Not Burner pressure. Hence the problem. 22 mm at boiler does become 15mm behind washing machine. Someone has put in 2 feet of 22mm? Maybe this says something. Customer also now told me boiler was changed 2 years ago because of...

To clarify. 22mbar standing P at meter. 21 standing P at boiler. 2.5 working P at boiler. 21 working P at meter.

Working pressure reveals the problem to be in the pipework. Not the meter unfortunately. Realized why I hadn't checked working pressure initially - screw on nipple done ridiculously tightly.

Will report back on working pressure. 22mm gas piping to boiler - so again assumption made of sufficient flow. It's easy to see a diagnosis when you want to. Take nothing for granted. One of my bugbears is the difference between flow rate and pressure.

Thanks for replies. Thinking about your comments and logic it does seem to be a supply problem I will recheck working pressures next Monday. Have to admit I didn't check since cooker was working well and 21 mbar standing pressure, so assumed it was not gas supply problem. Yes, I did try to...

ollski manual says it runs between 1v and 9v. The valve itself says max 15v. Although Baxi said it needs 24v ? I'm going with what it says on the valve. At 7v I'd expect more than 2mabr.

It is hard water area but there doesn't appear to be any problem with flow through the primary circuit. If there was I would still expect some modulation. But I get none. Rads all heat nicely even on low flame, flow rate good at tap, diverter good, pump good. GV has been replaced. Burner...

3 year old boiler. Customer reported poor hot water flow. Checked burner pressure to find boiler is not modulating on CH or DHW. Burner pressure does not move from about 2 mbar. 21mbar available at inlet to GV. Suspected NTCs, Gas Valve, PCB NTCs are fine: have run with spares outside of...