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God news and bad news, come accross it before but only on the early 28cdi thats to say around 3 years old and over, it does not seem to do any long term harm if left but the only way to overcome it is to replace the board, not cheap but a service contract with BG or Worcester would be cheaper ...

Most combi boilers have a vertical flue that would do as you describe and a lot are available with twin flues up to 15m high,the tech and spec sheets should be available at your local merchants for most of the larger brands. Why do you want afloor mounted combi instead of a wall hung model.

Just to clear things up the flow rates quoted by Pedan...... are the predicted flow at 35C so you can compare one make against another the actual flow rate for the 35cdi is 12 lt per min and the 28cdi is 10 lt per min so you would be better off with the lower flow as with only 11 lt comeing in...

The 280 does not have a built in filling loop so you will have to find were you pressure is re-set from ,follow the cold inlet to your boiler back over till you find the linj between it and one of the heating pipes, if you carnt find it in your own house how do you expect a stranger too. You...

First thing you do is not to buy anything, get the tech and spec for the oven you want and then you can find out how much clearence you need and where the gas point is located then get the dimensions of larder units and find one that fits before you start. Work it all out on paper before you...

what a load of twaddle. the room sat "should be able to be positioned in any room that does not have an extra heating element. the rads should have been calculated so that each individual room will reach its set temp ,in other words when the kitchen is 17C and the living room is 21C the hall...

What you describe does sound like an air pressure switch fault but re booting the pactroll board would not affect an air pressure switch fault only a board fault such as stuck in anti cycle.. if you have one of the original 24i with the dark brown air pressure switch try moving it when the...

If you want to check the flame senser look for betweem 4- 6micro volts but its easier to just replace it than check it. Crossed polarity will allso gave the same fault so check if any wireing has been done then check boiler, but its usually the flame senser. ps i assume your min gas pressure is...

How did you test the stat ?

Just re read your question, you only gas rate at max what o you mean by min range ?ie you gas rate a boiler on max and time the flow of gas from the meter ,if all well your readings should match the tech and spec

I am assumeing you want the pump for the shower so your best off having the feed direct from tank to shower via the pump, the hot supply should come direct from the cylender hence the essex flange that will fit to the side of the cylender (not in the pipework ) . check your tank is big enough...

Your pump may be stuck as aposed to seized, what type of system do you have, tanks in the loft, pressurized system ,combi etc

That info is is the manafacturers instructions (under commissioning) and is particular to that make and model .

Try looking at the instructions on the inside of the front cover.

Basic ? ?. greenstar above 90% eficiant ,junior around 78%, ps never had trouble with the heat ex (aloy) on the greenstar the gemans etc have been useing it for years no problem

i would be looking at how mant kg of gas per hour the first and second stage gas regs will pass, i would suspect its less than your total demand, i only work on small LPG installations so dont usualy have to work it out.

Noise is the hardest thing to judge, once you thik something is noisy you make a point of listening to it ,that makes it seem worse but i would say its about the same as most ,never had a customer complaine of noise on agreenstar other than a fault relateing to a definate noise that worcester fixed.

A . is the boiler gas pressures ok as per the book B . is the corect flue restricter ring fitted C . is the flue of the corect size takeing into acount bend etc (not to long ) D .does it terminate ok

Just putting my pennys worth in but, 17mb working pressure is not low at all ? you should be trying to get not less than 1mb drop from the meter to the boiler BUT as your test nipple is at the inlet of the gas valve not at the end of the pipework (the start of the boiler) thy resistance fom the...

The Greenstar is physicaly a large boiler but the output is about avv for a combi at 25kw, the 25HE has "normal" timers and controlls its the HEplus that has the complicated txt display (very usefull when you get the hang of it)