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the position that the vr10 sensor fits into the unistor cylinder makes the control temperature acurate for the unistor only,installing it into another cylinder may not control the temperature correctly and could create a dangerouse overheat situation,the vr65 prevents overheat situations when...

Hi Guys I'm pretty new to air source so looking for some advice on selection.I have an 800 litre buffertank with seperate hw production all heating apart from towell rads is under floor heating load is 14kw,this is backed up with a large solar array up to 14kw max output, initial calculations...

The ecotec plus comes with a two year warranty as standard,call them out .it sounds like a display board fault, had one go faulty due to a power cut possibly a surge when power came back on.Just a note these people who contact you regarding extended warrantys read the small print its probaly...

that was cheap Im repairing one for a client at the moment the turbulators had coroded away took me 2 hours to remove the remains from the sump, replacements are £11 each ,plus gaskets seals etc.

building regulations require the installation of an auto bypass ,also we have experienced situations where the bypass radiator is insuficient to allow a minimum flow rate through the boiler causing intermitent overheat problems especially with small systems and low water content cast iron heat...

thats about the third time ive replied to an old post Im losing it....!

[ Just to clarify for the hard of thinking reading this thread, what Danny stated regarding the 'Y' plan, this refers to a mid-poss valve; this valve will never not have an open port, even when all thermostats are satisfied, the hot water port will remain open, so this will even accommodate...

If its a plus version there are two taps underneath the boiler turn them both on check the pressure by pressing the bottom left - button when the pressure is around the 1 to 1.2 turn off both taps if the boiler does not spring into life press the reset button top left job done. plonker Ive...

I agree setting the heating load keeps the boiler in the condensing mode longer but the savings are greater than 2% it also helps the life of the heat exchanger and makes your system quieter,be aware when you reduce the heating load below 60% the pump automatically reduces down to speed one as...

we used to employ 2 ex bg engineers one is still with us and is one of our best engineers, the other was asked to leave he was sh#t without his laptop and orderd 3 parts to fix a boiler bacause one of them was faulty.i find the older long standing lads had better training and wernt fitters who...

Just a thought went to one the other day similar problem the diverter valve motor had come out of position,this could have happened during the service and the installer not noticed it its worth checking!

Just a point on the economy seven units the hot water can be verry hot and some pumps have a max temp of 65 degrees c check with the manufacturer before you purchase.secondly no problems reducing the pipework size as the original pipework was designed for gravity when you pump the water volume...

personally I would go for the vaillant 831,its better put together than the Veissman although there heat exchangers are top quality,the five year warranty only applies to an installer who has attended the training course so you would expect that whoever has offered you the installation has done...

If you are definately wanting to change the boiler then i would be looking at a viessman,the do a direct replacement storage boiler twice the quality of the powermax and a whole lot easier to maintain,your other option is the worcester highflow ,not a fan of worcester myselfe but quite relable...

if you turn the heating temperature controll down to zero this will shut off your heating

sounds like a sticking zone valve ,but could be your time clock.

If it was only fitted in Dec call vaillant its under warranty

Check you have power coming into the boiler (the switched live )if you have power and I suspect you have as you can hear the pump running my next port of call from what you have described would be the air pressure switch sticking ,this would prevent the boiler from firing up but can also come...

Inhibitors do exactly what the say on the tin they inhibit oxygen from being absorbed into the water (among other things) without the oxygen you dont get corosion, no corosion no gunk.If the system hasnt had any ihibitor in the you must clean the system first or yo could be wasting your time.

even if you do decide to fit a y plan valve you still need to fit a two port valve on the flow to the cylinder as a fail safe G3 regulations this helps to prevent the cylinder taking the side of your house out when it explodes .....fit an s plan