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GAS BOILER BASICS - WHAT ARE THE PARTS CALLED HOW DOES IT WORK SEQUENCES - GAS TRAINING
WEBVTT Kind: captions Language: en
00:00:00.380 [Music] 00:00:05.03000:00:05.040 what's going on everybody 00:00:07.05000:00:07.060 I'm gold gasps this episode we're going 00:00:09.29900:00:09.309 back to basics we're going to look 00:00:10.91900:00:10.929 inside some gas boilers I'm going to 00:00:13.11000:00:13.120 give you the names of the parts and also 00:00:15.65900:00:15.669 going to look at the ignition sequences 00:00:17.31000:00:17.320 as well if you enjoy a drop a like don't 00:00:20.46000:00:20.470 forget to subscribe 00:00:21.81000:00:21.820 push that Bell notification button as 00:00:23.97000:00:23.980 well if you don't do that you might miss 00:00:26.00900:00:26.019 out on some new videos that drop maybe 00:00:29.16000:00:29.170 some new promotions and new competitions 00:00:31.52900:00:31.539 so it's worth doing another video I'm 00:00:34.61900:00:34.629 gonna show you some parts and give you 00:00:36.09000:00:36.100 their names the middle going to look at 00:00:39.38900:00:39.399 some ignition sequences the screenshots 00:00:41.54900:00:41.559 and the manuals and some full finding 00:00:43.86000:00:43.870 flowcharts and the end of the video 00:00:46.65000:00:46.660 we're going to look at some boilers 00:00:48.56900:00:48.579 inside so you can actually see the parts 00:00:50.36900:00:50.379 and where they're located and what they 00:00:52.43900:00:52.449 look like in the boiler this video is 00:00:55.92000:00:55.930 aimed at trainees or apprentices just 00:00:58.47000:00:58.480 beginning to work on gas boilers or want 00:01:00.84000:01:00.850 to know more about gas boilers it's just 00:01:03.66000:01:03.670 a guide check your manuals for the 00:01:06.63000:01:06.640 specific boilers you're working on 00:01:08.34000:01:08.350 because every boiler is unique and don't 00:01:12.99000:01:13.000 open up the casing of a gas boiler or 00:01:16.05000:01:16.060 work on a gas boiler unless you are with 00:01:19.32000:01:19.330 someone who is gas qualified 00:01:24.22000:01:24.230 this is the control board or PCB printed 00:01:28.16000:01:28.170 circuit board 00:01:33.87000:01:33.880 central heating or circulating pump 00:01:39.34000:01:39.350 fan assembly is an old style and the new 00:01:42.73000:01:42.740 style with control board attached to 00:01:44.74000:01:44.750 modulate 00:01:48.00000:01:48.010 ApS or air pressure switch 00:01:53.83000:01:53.840 gas valve 00:01:58.81900:01:58.829 overheat stat 00:02:05.80000:02:05.810 you 00:02:09.32000:02:09.330 Pilate and Pilate injector 00:02:13.66000:02:13.670 spark generator there's a push-button 00:02:16.72900:02:16.739 one here that can also be called a piezo 00:02:19.91000:02:19.920 igniter 00:02:23.66000:02:23.670 thermocouple found on the older boilers 00:02:28.44900:02:28.459 electrodes there is a flame sensing one 00:02:31.76000:02:31.770 and also an ignition one 00:02:38.32000:02:38.330 water pressure switch or sensor or WPS 00:02:44.55000:02:44.560 sensors for misters NTC sensor the 00:02:50.71000:02:50.720 misters and sensors you have one for the 00:02:53.56000:02:53.570 hot water 00:02:54.49000:02:54.500 central heating flying return because I 00:02:56.92000:02:56.930 have clamp on style flu sensor so you 00:03:00.85000:03:00.860 need to have a little read up also 00:03:02.47000:03:02.480 different colors from different 00:03:03.91000:03:03.920 manufacturers 00:03:06.25000:03:06.260 hot water flow switch or paddle switch 00:03:10.83000:03:10.840 domestic hot water heat exchanger or 00:03:13.83900:03:13.849 plate heat exchanger or plate to plate 00:03:19.32000:03:19.330 expansion vessel 00:03:28.21000:03:28.220 pressure release valve or safety valve 00:03:34.82000:03:34.830 there is a mid-position valve or three 00:03:37.82000:03:37.830 port valve 00:03:45.42000:03:45.430 zone valve or two-port 00:03:54.97000:03:54.98000:04:03.32000:04:03.330 is the burner assembly in the burner arm 00:04:05.72000:04:05.730 I'm going to show you some insides of 00:04:07.61000:04:07.620 the heat exchangers as well 00:04:15.96000:04:15.97000:04:21.33000:04:21.340 here's some exploded diagrams of the 00:04:23.58000:04:23.590 boilers 00:04:25.79000:04:25.800 I will now give you a brief ignition 00:04:28.43000:04:28.440 sequence but check your manuals for the 00:04:31.49000:04:31.500 specific ones for your boiler ignition 00:04:36.29000:04:36.300 sequences there in all the manuals so if 00:04:39.14000:04:39.150 in doubt check your M eyes you have your 00:04:42.37900:04:42.389 demand for central heating or if you run 00:04:45.17000:04:45.180 the hot tap the boiler will start the 00:04:48.37900:04:48.389 fan will run the pump will run once the 00:04:50.86900:04:50.879 fan has been proved to run also 00:04:52.90900:04:52.919 sometimes there are pump for proving 00:04:54.43900:04:54.449 switches as well the ignition sequence 00:04:56.89900:04:56.909 will start 00:05:00.82000:05:00.830 the sparkle 00:05:02.69000:05:02.700 begin to spark it we'll try this for a 00:05:05.03000:05:05.040 few attempts if the flame sensing 00:05:07.49000:05:07.500 electrode doesn't get a flame sensed 00:05:09.65000:05:09.660 then it will end and go to a full code 00:05:13.52000:05:13.530 or lockout if the burner does light and 00:05:16.85000:05:16.860 the flame sensor has sensed the flame 00:05:19.79000:05:19.800 I've send the signal back to the board 00:05:21.41000:05:21.420 the gas valve will stay open and 00:05:23.12000:05:23.130 everything will continue to run until 00:05:25.45000:05:25.460 your demand has been turned off or the 00:05:28.85000:05:28.860 hot water is off 00:05:34.37900:05:34.389 when the boiler starts up it will also 00:05:37.26000:05:37.270 check the safety devices make sure the 00:05:39.99000:05:40.000 overheats that hasn't tripped make sure 00:05:42.33000:05:42.340 the pressure sensor is working correctly 00:05:45.27000:05:45.280 or is not over pressurized under 00:05:47.10000:05:47.110 pressurized so all the safety devices 00:05:49.29000:05:49.300 are checked and it may or may not 00:05:51.80900:05:51.819 operate depending if they have tripped 00:05:53.76000:05:53.770 or not 00:05:56.93000:05:56.940 is some of the stats and the senses that 00:05:59.99900:06:00.009 are mentioned before flow switches well 00:06:03.54000:06:03.550 flow sensor water pressure switch 00:06:14.70000:06:14.710 or the flu stars well electrode 00:06:25.36000:06:25.37000:06:42.09000:06:42.100 so we have our central heat in demand 00:06:44.58000:06:44.590 that then sends a signal to the board 00:06:47.34000:06:47.350 the board sends a signal to the pump and 00:06:50.58000:06:50.590 the fan as soon as they are proved to be 00:06:52.92000:06:52.930 running that sends a signal back to the 00:06:54.87000:06:54.880 board which sends a signal to the gas 00:06:56.94000:06:56.950 valve which then opens sends gas into 00:07:00.27000:07:00.280 the burner that begins to spark from the 00:07:02.49000:07:02.500 electrode which also sent from the PCB 00:07:04.59000:07:04.600 as well and the ignition sequence has 00:07:07.41000:07:07.420 started 00:07:16.31000:07:16.320 so your hot tap is opened the flow 00:07:19.74000:07:19.750 sensor senses the water being passed 00:07:22.35000:07:22.360 through sends a signal to the board 00:07:24.96000:07:24.970 which then tells the motor on the 00:07:27.57000:07:27.580 diverter valve to open the diverter so 00:07:31.26000:07:31.270 the hot water being heated up flows 00:07:33.60000:07:33.610 through the plate heat exchanger your 00:07:36.60000:07:36.610 fresh water is passing through the other 00:07:39.21000:07:39.220 side of that plate heat exchanger and 00:07:41.10000:07:41.110 gets heated up through the place 00:07:50.28000:07:50.290 to clarify the hot water sequence is the 00:07:53.70000:07:53.710 same as the central heating the fan the 00:07:56.73000:07:56.740 pump will run the gas valve will open 00:07:58.26000:07:58.270 etc but because the flow sensor has been 00:08:01.68000:08:01.690 triggered the diverter and motor will 00:08:05.43000:08:05.440 move into the hot water position sending 00:08:08.73000:08:08.740 the heated up water instead of down the 00:08:11.19000:08:11.200 radiators but down the plate heat 00:08:13.74000:08:13.750 exchanger and then your hot water will 00:08:16.29000:08:16.300 get hot from there combi boilers can 00:08:18.69000:08:18.700 only do one at a time and it always 00:08:21.27000:08:21.280 prioritize the hot water so if you open 00:08:23.40000:08:23.410 a hot tap your central heating will stop 00:08:26.13000:08:26.140 but you probably won't even realize 00:08:28.74000:08:28.750 because the radiators will be hot anyway 00:08:38.12000:08:38.13000:08:56.69000:08:56.700 here's a heat only boiler same again 00:08:59.86000:08:59.870 once you have a demand the fan will run 00:09:02.81000:09:02.820 once it's proved it tells the gas valve 00:09:05.03000:09:05.040 and the spark to begin you can see here 00:09:08.42000:09:08.430 the air intake as well who mixes a 00:09:10.85000:09:10.860 perfect amount of air and gas so it can 00:09:14.24000:09:14.250 burn correctly 00:09:38.72000:09:38.730 gonna finish up with a couple of calm 00:09:40.61000:09:40.620 B's he's the newest style then there's 00:09:42.92000:09:42.930 an older style as well so you can see 00:09:44.63000:09:44.640 the layouts on the oldest style it's 00:09:47.36000:09:47.370 quite a few micro switches on those 00:09:49.67000:09:49.680 micro switches behind him or the Hydra 00:09:52.16000:09:52.170 blocks or the diverter valves and he 00:09:54.92000:09:54.930 knows our diaphragms and plates with 00:09:58.13000:09:58.140 pins on them so those plates and 00:10:00.56000:10:00.570 diaphragms get moved and they pushed a 00:10:03.32000:10:03.330 switch with a micro switch in them so 00:10:05.66000:10:05.670 then that activates the central heating 00:10:07.52000:10:07.530 or the hot water 00:10:19.62000:10:19.63000:10:32.37000:10:32.380 you add me on social media on Instagram 00:10:35.04000:10:35.050 or Twitter then you can find some 00:10:37.25000:10:37.260 competitions promotions and some 00:10:40.23000:10:40.240 plumbing disasters as well 00:10:45.73000:10:45.740 that does it for this video thanks for 00:10:47.88900:10:47.899 watching 00:10:54.39000:10:54.400
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