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How to replace heating and cooling indoor coils
WEBVTT Kind: captions Language: en
00:00:01.310 okay folks what I'm going to talk about 00:00:03.74000:00:03.750 today is what it takes to replace an 00:00:06.38000:00:06.390 indoor coil and why we have to replace 00:00:08.36000:00:08.370 it after sometimes four or five years 00:00:10.87900:00:10.889 six years we replace them all the time 00:00:13.66900:00:13.679 and the reason for that I want you to 00:00:15.82900:00:15.839 look at this particular coil here you've 00:00:17.75000:00:17.760 got three dissimilar metals to start 00:00:20.12000:00:20.130 with you've got copper you've got 00:00:22.55000:00:22.560 aluminum you've got ten the same thing 00:00:26.21000:00:26.220 here in this particular case you've got 00:00:27.71000:00:27.720 the same copper ten in metal this one 00:00:30.05000:00:30.060 even set in the waters here it's 00:00:31.42900:00:31.439 actually just saying the water in itself 00:00:32.84000:00:32.850 and it's called excess corrosion what 00:00:35.81000:00:35.820 causes this is what we call forming 00:00:38.33000:00:38.340 carry acid acid that takes a chemical 00:00:42.47000:00:42.480 reaction of oxygen and water and these 00:00:46.13000:00:46.140 dissimilar males it just corrodes and 00:00:48.08000:00:48.090 breaks things down so the guy says well 00:00:51.22900:00:51.239 what does it take to replace it I said 00:00:52.97000:00:52.980 it's about three to four hours labor 00:00:54.65000:00:54.660 okay 00:00:55.49000:00:55.500 he says why I said well first of all 00:00:58.67000:00:58.680 here's the reason here's your typical 00:01:00.38000:01:00.390 air handler I've got a halfway full that 00:01:02.42000:01:02.430 start we got to disconnect what we call 00:01:05.27000:01:05.280 the SS two switches here okay we've got 00:01:08.75000:01:08.760 to either pump the unit down or we have 00:01:12.05000:01:12.060 to recover the refrigerant that's very 00:01:13.76000:01:13.770 important okay then you got to come in 00:01:16.34000:01:16.350 here you got to physically pull the coil 00:01:17.87000:01:17.880 out take it out you're gonna get your 00:01:23.09000:01:23.100 new coil say this is a new coil this is 00:01:25.78900:01:25.799 demonstration take this new coil slide 00:01:27.95000:01:27.960 it back in you've got a soldered all in 00:01:30.41000:01:30.420 these copper fittings they all have to 00:01:32.45000:01:32.460 be sorted with the torch torch okay once 00:01:35.84000:01:35.850 you get all this complaint is DeeDee 00:01:37.31000:01:37.320 gonna add a filter drier outside anytime 00:01:40.13000:01:40.140 you open up your system you expose it to 00:01:42.41000:01:42.420 contaminants you have to always put a 00:01:44.45000:01:44.460 new filter drawer in if your technician 00:01:47.06000:01:47.070 or your AC contract does not put this 00:01:49.24900:01:49.259 device in he's taking short coding so 00:01:51.98000:01:51.990 please don't allow that 00:01:53.13900:01:53.149 then you go to do a nitrogen test you 00:01:55.46000:01:55.470 want to put the nitric test up to work 00:01:57.02000:01:57.030 and pressure the system okay which is I 00:01:59.99000:02:00.000 tell my guys around 400 psi leave it on 00:02:02.95900:02:02.969 for 15-20 minutes all right no leaks 00:02:05.95900:02:05.969 then you want to pull it back and you 00:02:07.63900:02:07.649 don't pull the back you down 00:02:08.91900:02:08.929 about 4 or 500 microns okay that may 00:02:12.13000:02:12.140 take 20 minutes 30 minutes an hour it 00:02:14.80000:02:14.810 just depends on the lintel I set all 00:02:17.31900:02:17.329 right now once you do all that you have 00:02:20.14000:02:20.150 to go out there you have to fill it back 00:02:22.80900:02:22.819 up with freon the 14 8 is what it 00:02:25.00000:02:25.010 usually is most times these days and it 00:02:27.00900:02:27.019 has to be sub cold correctly and this 00:02:29.14000:02:29.150 thing has to run really because the 14 8 00:02:31.86000:02:31.870 it has the molecules they just expand so 00:02:34.80900:02:34.819 quickly so you can't just quickly charge 00:02:36.75900:02:36.769 that like sometimes we did in the old 00:02:38.19900:02:38.209 days with 22 ok so that's why it takes 00:02:42.00900:02:42.019 long it takes pumping the unit down 00:02:44.86000:02:44.870 pulling out the coil putting in the 00:02:48.33900:02:48.349 filter dryer disconnecting all the SS 2 00:02:51.61000:02:51.620 switches reconnecting all the SS 2 00:02:53.55900:02:53.569 twisted putting in a nitrogen test doing 00:02:56.64900:02:56.659 it vacuum so cool that's what it takes 00:02:59.67900:02:59.689 homeowners it is a lot of work it's like 00:03:02.44000:03:02.450 having a major component replace to your 00:03:04.36000:03:04.370 car more like a head gasket or all that 00:03:07.65900:03:07.669 stuff would have to pull all the valve 00:03:08.80000:03:08.810 covers off it's a full day's job 00:03:10.42000:03:10.430 sometimes depending on where the 00:03:11.61900:03:11.629 location is if you have any questions 00:03:13.59900:03:13.609 just go to Joan's air-conditioned comm 00:03:15.61000:03:15.620 if you liked this video please share 00:03:17.12900:03:17.139 please subscribe and please comment 00:03:19.21000:03:19.220 thank you
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