How Combi Boilers Work - Plumbing Tips

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Language: en

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plumber parts code at UK honest reviews
00:00:03.169 00:00:03.179 and advice sponsored by Heaton plum comm
00:00:07.450 00:00:07.460 hello and welcome to today's panel parts
00:00:10.009 00:00:10.019 card UK video this video is basically a
00:00:12.560 00:00:12.570 brief description of combi boiler
00:00:13.999 00:00:14.009 systems and the difference between them
00:00:16.129 00:00:16.139 and tank fed systems today we're using a
00:00:18.680 00:00:18.690 grand vortex boiler to describe how
00:00:20.689 00:00:20.699 combi system works Grant vortex has its
00:00:22.910 00:00:22.920 main boiler system here so you've got
00:00:24.980 00:00:24.990 your your ballot down there combustion
00:00:26.689 00:00:26.699 chamber in here
00:00:27.529 00:00:27.539 basically what combi boiler does is
00:00:29.359 00:00:29.369 instead of having a heating system with
00:00:32.389 00:00:32.399 the big tank and maybe an indirect call
00:00:34.250 00:00:34.260 through or a heating element inside a
00:00:36.709 00:00:36.719 combi boiler heats up the water directly
00:00:38.299 00:00:38.309 using this bit here this is a plate heat
00:00:40.910 00:00:40.920 exchanger let's just have a very quick
00:00:42.950 00:00:42.960 look at plate heat exchanger and what it
00:00:45.319 00:00:45.329 does now plate heat exchanger has a very
00:00:48.770 00:00:48.780 high heat recovery which means it can
00:00:51.830 00:00:51.840 transfer heat from one body of water to
00:00:54.350 00:00:54.360 another very quickly almost in real time
00:00:57.369 00:00:57.379 that's very important when being
00:01:00.110 00:01:00.120 installed and used in a combi boiler we
00:01:03.139 00:01:03.149 imagine we have the boiler here pumping
00:01:06.200 00:01:06.210 heated hot water out into our heat
00:01:08.719 00:01:08.729 exchanger here it goes round through the
00:01:11.630 00:01:11.640 heat exchanger and then back to the
00:01:13.789 00:01:13.799 border to be reheated now we have our
00:01:15.770 00:01:15.780 cold main in this picks up water doesn't
00:01:19.249 00:01:19.259 mix with anything else doesn't mix with
00:01:21.230 00:01:21.240 a heated water than the boiler and it's
00:01:23.060 00:01:23.070 heated up and Peaks heat up and goes off
00:01:25.580 00:01:25.590 to the hot taps that's how they plate
00:01:28.399 00:01:28.409 heat exchanger works so say when you
00:01:31.249 00:01:31.259 open up your tap there's a dab of
00:01:32.990 00:01:33.000 pressure switch which is like a paddle
00:01:34.730 00:01:34.740 but it feels the water go through it
00:01:36.649 00:01:36.659 clicks turns the boiler and this little
00:01:38.780 00:01:38.790 pump on down here when that pump comes
00:01:40.760 00:01:40.770 on it drags hot water from the burner
00:01:43.490 00:01:43.500 right this is hot water that you don't
00:01:45.109 00:01:45.119 wash in okay drags it through through
00:01:47.300 00:01:47.310 this 35 litre heat store and then
00:01:49.730 00:01:49.740 through the call in your heat exchanger
00:01:51.830 00:01:51.840 and then back to the boiler as cold
00:01:54.200 00:01:54.210 water enters from the from the mains as
00:01:56.569 00:01:56.579 the water you're washing it picks up
00:01:58.459 00:01:58.469 heat through this plating exchanger it's
00:02:00.830 00:02:00.840 got a very high heat recovery rate and
00:02:02.420 00:02:02.430 that goes off out to your taps really
00:02:05.330 00:02:05.340 really hot and basic that's how combi
00:02:06.980 00:02:06.990 boiler works I just want to show you the
00:02:08.900 00:02:08.910 two different routes the two bodies of
00:02:10.790 00:02:10.800 water take let's have a quick look you
00:02:12.380 00:02:12.390 have your cold water
00:02:13.860 00:02:13.870 it comes in here goes through an
00:02:15.690 00:02:15.700 isolating valve so we can switch it on
00:02:17.070 00:02:17.080 and off now this is the pressure switch
00:02:18.390 00:02:18.400 here all that is is a small paddle
00:02:20.220 00:02:20.230 imagine your light switch but instead of
00:02:21.809 00:02:21.819 your finger pushing the light switch
00:02:23.430 00:02:23.440 it's the fly of water going over a small
00:02:25.230 00:02:25.240 paddle so the paddle clicks and turns
00:02:27.059 00:02:27.069 the boiler on we come down down here
00:02:29.130 00:02:29.140 through into the heat exchanger it gets
00:02:31.830 00:02:31.840 all heated up and hot comes out through
00:02:33.690 00:02:33.700 here is hot water goes through this
00:02:35.309 00:02:35.319 mixer and then up here after your taps
00:02:37.440 00:02:37.450 also you have another the cold water
00:02:39.210 00:02:39.220 supply dusty and comes through here so
00:02:41.220 00:02:41.230 you can basically adjust this and give
00:02:43.020 00:02:43.030 that a certain type of heat now let's
00:02:44.460 00:02:44.470 look at where the heating water goes the
00:02:46.560 00:02:46.570 heating water comes at the top of the
00:02:48.930 00:02:48.940 boiler here there can either tee off to
00:02:51.060 00:02:51.070 the heating system this way or into our
00:02:53.100 00:02:53.110 heat exchanger comes down into the pump
00:02:55.440 00:02:55.450 pumped into the bottom of the 35 litre
00:02:57.420 00:02:57.430 heat store and then it comes out of the
00:02:59.220 00:02:59.230 heat store at the top here goes through
00:03:00.780 00:03:00.790 the plate heat exchanger is back out
00:03:02.430 00:03:02.440 from the boiler into the return of the
00:03:04.020 00:03:04.030 boiler just like that it is worth
00:03:05.370 00:03:05.380 pointing out the 35 litre heat stores
00:03:08.040 00:03:08.050 and on always in koma boilers for
00:03:10.350 00:03:10.360 instance most gas boilers don't have a
00:03:12.030 00:03:12.040 35 litre heat stall or heat store at all
00:03:14.460 00:03:14.470 their heat recovery is so good they can
00:03:16.949 00:03:16.959 heat up hot water as it's needed without
00:03:19.229 00:03:19.239 a store there the basic advantages of
00:03:21.360 00:03:21.370 having a combi boiler are you don't have
00:03:23.340 00:03:23.350 to heat up large amounts of water only a
00:03:25.259 00:03:25.269 35 litre heat store whereas most hot
00:03:27.569 00:03:27.579 water tanks are looking at least 100
00:03:28.979 00:03:28.989 liters worth of water so basically
00:03:30.960 00:03:30.970 that's how I combi boiler works I hope
00:03:32.699 00:03:32.709 that's helped and if you think we've
00:03:34.830 00:03:34.840 missed anything you want to know any
00:03:36.270 00:03:36.280 more anything like that let us know and
00:03:38.699 00:03:38.709 as ever subscribe to our videos oh I
00:03:40.949 00:03:40.959 have a wicked great time and I'll see
00:03:43.349 00:03:43.359 you guys soon thanks very much bye
00:03:45.199 00:03:45.209 00:03:48.720 00:03:48.730 and advice sponsored by heat and plumb
00:03:51.420 00:03:51.430 calm
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