Recent content by vessy_73

Get your point, God knows is the answer, concrete floors, definitely 22mm from valves, down to ground floor, I think it's ok as I can get the 8 degree on the index rad (or 11 deg at pump speed 2) and it's a big rad (6500 btu) I'm going to leave the pump in 2 for a while as I'm getting optimum...

Not sure I fully understand, flow to me is obviously enough as rads have a temp differential of up to 8 deg, 22 feeding downstairs with 15mm feeds to each rad, total of 5 rads, only one of these has its lockshield fully open. Should I just leave it at 14 deg split at the boiler to keep the 10-11...

Ok, gas pressure has been adjusted, it was on the low setting and has now been set to max, system now gets to 60 degrees in around 30 mins and house temp rises much quicker. Only issue now is kettling! Boiler sounds like a kettle warming up or like the cold water header tank filling constantly...

Ok, so did the gas meter test this evening, took 59 secs to fully rotate, this gives a boiler draw of 18.5 kW, the manual for the boilers says low is 18.68 input for 14.95 kW output (51000 btu) high is 21.98 input for 17.58 kW output (60000 btu). So the boiler is adjusted for minimum output...

Lol, ok habit I guess! Boiler last services a year ago, I have the manual so I will check the gas flow rate using the meter, good shout.

Thanks for clearing that up, I didn't realise that it was normal to slightly undersized a boiler, I read somewhere on here that you usually add 9000 btu for water demand, that's what has lead me to believe it was undersized. It would be nice to have HW and CH running together, 3 boys and us use...

This does make sense as my current load is 59000, this is without HW factored in, if the boiler is maxed out already then my only option is a bigger boiler, I'm thinking 80000 to give me enough power to heat rads and water together and a little headroom if any rads are added or upsized in the...

OK Thanks, So I can get my head round this, if I presently have an 11 deg drop across the rads then the flow through them is correct for the size, if the boiler output is increased (either by gas rate or new boiler) then what do I re-balance? where does the extra flow go that is needed to bring...

Morning all, Thanks for the replies, DP I have done the staggering as you said, if both HW and CH are demanding the effect is even worse, all the figures I have given are with CH only. I too did think about getting the gas checked, if the pressure is low and it is increased then I'm back to my...

Boiler only starts to cycle after about 2 1/2 hours (once trv's upstairs close), once the flow gets to 75 deg it shuts down, then comes on again around 69 deg, prob after 3-4 mins, fires for 3-4 mins until temp again reaches 75. When heating HW only the system gets to 75 deg after about 5 mins...

Hi, Recently moved into a 70's house (detached 4 bed 1700 sqft) and now winter is here the central heating system is struggling, it's fuelled by a Baxi Solo 2 60pf boiler supplying heating and vented HW using S plan plumbing. I've pretty much come to the conclusion that the boiler is...

Somewhere messing with something!