Tim Mackey Posted April 17, 2015 Share Posted April 17, 2015 My friend has a combi boiler system whereas im used to a good old fashioned boiler and tank. I am quite happy with altering the pipes ( half inch / 15mm copper ) and removing the rad etc but how should I stop the water ( heating is off at this point in time ) and will there be any Iissues "rebooting" after the rad is relocated.Edited By Tim Mackey on 17/04/2015 08:07:23 Quote Link to comment Share on other sites More sharing options...
brfc7 Posted April 17, 2015 Share Posted April 17, 2015 You need to close both the radiators inlet and outlet the same as you would for old style boiler when taking it off. When it comes to replacing it you need to plumb it all back in and turn heating on. Once up to temperature open both in and outlets and the bleed screw as you would the old way. The only difference is you need to keep the system pressurised by opening the cold in feed to the boiler for short periods to keep pressure gauge between 1 - 2. Hard to explain exactly in words so watch a couple of vids on YouTube. Baz Quote Link to comment Share on other sites More sharing options...
Andy48 Posted April 17, 2015 Share Posted April 17, 2015 Tim asked about moving the rad, not replacing it. Yes you have to drain the full system. As its a sealed system, turn off the boiler at the mains, close the two CH valves under the boiler (not essential but useful) and drain the system, and mess to your heart's content. Once your plumbing is done, first flush out the system to get rid of any flux, swarf etc. Then refill the system using the filling loop either built into the boiler, or located underneath it. Bleed all the radiators and the boiler itself, and re-pressurise the system to (usually) 1 bar. There should be no problems starting the boiler up again. You might need to put some anti- corrosion fluid in too. Easy really...... Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 17, 2015 Author Share Posted April 17, 2015 Thanks Andy - I'll let you know how it goes LOL Quote Link to comment Share on other sites More sharing options...
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