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Replace expansion vessel

turn off isolator on heating pump. Leave hot water on. Put hand on heating return pipework. Open the valve you have just closed and you may feel the return pipework get hot . If it does it means the non return valve is not working and allowing reverse circulation.

never rely on the auto switch over valve as it will switch over when you still have upto 5% left. even more if the temp is cold. leave the bottles turned off on 2 until you run out and then switch them on.

you have altered the burner to the completely wrong settings. those are for a non bx burner head. you need to alter to these. 0.75/80/eh nozzle 10.3 bar/150psi oil pump pressure combustion head depth at 19mm. you have to use the special tool to set this air shutter start at 4.25 and...

it could be tha, but you don,t get heat leaking out past it. It draws cold water from heating back down it and cools the exchanger. Easy test is to turn the pump isolater off and see if it stops the hot water from trying to reheat

These semi blue flame burners can be setup wrongly even with an analyser. There are a number of potential issues with the setup. You have changed the photocell? Put the old one back in as a guess you have fitted the wrong type. Send us some updated pictures of it all cleaned. Main exchanger...

this needs to be fully cleaned. both the main exchanger and the secondary exchanger. it then needs the burner to be cleaned and have a new nozzle and be setup correctly using an anaylser. this is not a diy job. This is most likley caused due to boiler not being serviced reguarly . ( max about 14...

Haven't seen those issues here in norfolk. warmflow with the exchangers rotting through halfway up the main exchanger and grant slave cylinders on external models are my main problems. Leaking on the down firing worcesters on the secondary plastic exchanger casing have normally been down to...

This is the later version boiler. Might even have the Rdb bx burner. Bet he has put the wrong type photocell in. Had a few of these soot up if they haven’t been serviced for more than a couple of years

just use a standard honeywell wiring center with 12 terminals. you can get 3 or 4 (0.75) cables in to each connection point. use programmable room stats for each zone. Your heat pump normally needs volt free switching. to do this instead of live to the grey of each 2 port valve you have to...

Check that hot water pump is spinning. check that all the air is out of the circuits. ( double check the manual air vent with the system turned off) make sure the auto air vents work as well make sure system pressure is at 1.0 bar. check that the flow ( grey cable ) and store ( black shroud)...

sorry didn't read it correctly, might have been still sobering up!

that picture shows that the boiler has the hot water tap on somewhere or the flow switch is on the way out. pull out the plug on connection 13/14 and see if demand light turns out. If so and your heating then works fine you have found the problem. you would alos benefit raising the pressure up...

one thing that many have forgotton about is how a heat pumps own control logic works. For many heat pumps when a demand is created for heating it will start and run at low output for a few mins then start to increase it's output as required. If someone uses enough hot water then the systems...

On your blending valve to flow ( hot from boiler) goes into the bottom pipe. The return back to the boiler the pipe on the left. If these care crossed it will constantly struggle to blend and once the return gets hot it around the valve it will cause the underfloor system to pump anything...

your plumber should be G3 qualified to work on these as they are a controlled service. If he is qualified he could sort this easily. Afraid we can't give advise out on controlled items

would be better to pick up a motor not a pump!!

Yes your wiring would be correct

Most of the multifuel stoves only have a small output to water. Often only 3 or 4 kw so often not enough to run many rads

If it has that then you can just wire it in to control both heating and hot water. You will need to reset the programmer and enable it for both heating and hot water