Recent content by davidsl500

Yes it does last a little longer if the boiler is left to go cold. The central heating pipes and some rads get slightly warm after a long period of time probably due to the short firing here and there. I can hear the motorised valve motor whirring and clicking to a stop after a short while...

Hi Peeps, Vokera Synesti 35 Combi boiler Hope you can give me a bit of guidance on my present boiler issue. The DHW works fine and is used regularly each day all year round. The central heating is only used during the winter months and was tried about a month ago for an hour or so and was...

I had this happen to me in the eighties when the boiler stat failed and just kept heating the water in the primary until it boiled over into the expansion tank - sounded like a jet engine as it whooshed through the pipes. The DHW circuit wouldn't be very hot if the boiler has only been on 15 mins.

Having sorted out my combi boiler I have realised that since the addition of 2 sizable rads to the system, the boiler gauge rises from its pretty static 1 bar when the heating is off up to 2.5 bar when its on. If I lock off a couple of rads and start the central heating then the pressure rises...

That would do it as well but what we don't know is how far the computers are from the cnc machines plus he has 1 switch box already - correctly wired to the 2 machines with a cable back to 1 computer - this cable can be simply plugged in to the "common" on the new switch box and a cable run to...

You can do this with 2 AB Switch boxes ! You do it by using one switch box "backwards" and one "forwards". The first switch box is wired as if you are connecting 2 computers to one printer. The output from this switch box which would normally go to the printer, instead goes to the second...

Thanks for the comments. I appreciate that the cold pressure won't stay at 1 bar - it has been pretty consistent so far but the ambient temperatures have been pretty constant here. I have locked off the rads in two bedrooms and one of the hall rads and the max gauge pressure has settled at...

Download the service manual from here http://www.vokera.co.uk/trade-professionals/manuals-literature/ and get the part numbers from the schematic drawings / parts list at the end of the manual and then try http://www.vokeraboilerparts.co.uk

Thanks for the reply Mandate. The en suite and utility were added a year apart and the plumber different in each case so both were just adding one rad and each may have thought that there would be spare capacity to deal with that. I presumed that once with all the rads on we reached 2.5 then...

I did a little experiment last night / this morning. From my last post, When I originally switched on the system after repressuring the EV and refilling the system only 4 of the 11 rads worked and the boiler gauge read a steady 1.6-1.7. As I got the other rads working by turning off the already...

So the saga continues.......so yesterday evening the boiler pressure gauge had stabilised at 1.7 bar after an hour of being switched on but only 4 of the 11 rads were actually hot, the rest being stone cold. All rads were full of water. So I turned off the working rads and that kicked in another...

So, the update. Drained the system down a bit and left a bleed valve open. Before depressurising the EV I checked the pressure reading at it was 15 PSI so was not feeling hopeful... Depressurised it and air only coming out of it. Repressurised it to 15 PSI filled the system to 1.2 bar, bled the...

apologies for the double reply I hit quote instead of edit !

I was wondering about that. I followed the "how to guide" on this side and it said to close the bleed nipple once the gauge reached zero and not leave it open while re pressurising the EXV. I have been reading the forum and it seems that the general concensus is to leave a bleed open - I can...

So the latest update. I have’t got home yet but got the missus to follow instructions – which I think is a first! Opened a rad bleed valve to get the boiler pressure gauge down to zero and then closed it off. Foot Pump attached to EXV – air heard coming out of it as the pump valve was locked...