Derek shows us the gas safety controls you will find in old and new boilers. these controls include the multifunctional gas vale the air pressure switch and flame rectification.
Another great video Derek. Back at the test centre this next week and these videos are really going to help me Many thanks for taking the time to do them and explain them thoroughly Mick
I have my initial ACS tomorrow and I was looking for information to confirm my knowledge of controls is correct. Thank you for your help in this video, as well as sharing some additional information I did not know before!
is the file or thermostat probe working on the principle that bi metal expands on different rate when subject to heat. This mechanical movement then controls solenoid valve and regulate gas the burner via ? thanks
My terminal coupler was replaced as it was not holding a charge but now after a minute of the heat being on it turns off the pilot light and I lose the heat. A saftey mechanism is popping off somewhere.
Hiya Derek. Can you write where the continuity should and shouldn’t be on the tests you on the fan pressure switch from around 29:15? Eg what two do you mean when you lose it between these two and gain it between these two (if that makes sense)
Great refresher videos keep them up. One question some say that on a boiler like the first one a back boiler with thermo electric and testing for safety device passing, some say you are allowed the permissable drop what are your views
Once you hear the thermoelectric closeting it can drop a little bit as the valve settles on the seat but I have never heard of a permissible drop on that test but if you think about it when you do a tightness test you get 4 or 8 Mbrs with apprentice connected so maybe that’s what they mean. Thanks for your great comment and thanks for watching cheers
@@tomkatgastraining I've failed vailant heat only and glowworm hxis for drop on gas valves when off and been told I'm wrong as that's what permissable is for but to me it's a safety device.
Antony Buckley I would fail them too. The solenoid on a zero gas valve is very important when the boiler is in purge mode so if it’s passing it’s always putting unburnt gas in the combustion chamber. I have had it where the neighbours can smell the gas so in my eyes that can only be dangerous. Thanks for watching cheers
Derek could you do a few videos on 15mm 22mm pipe bending please. I saw your one video where you did a semi passover into a socket. Pipe bending and soldering would be very interesting videos! Thanks!
Wayne Nixon already done a soldering video it’s the health and safety of a blow lamp and I will be doing a pipe bending video in the future. Thanks for your comment and watching cheers
@@tomkatgastraining Wouldn't miss your videos as I've been a viewer for quite a while. Glad to see your channel growing as your content is up their with DrPipe, PBPlumber and Allen Heart. But you explain things in much more details and show up examples too. Amazing content and well explained! Many thanks for taking the time to produce these videos, much appreciated.
whats the purpose of the clear tube from the air pressure switch ? Thank you so much for the time taken to make these videos, really appreciate the all help from them
@@tomkatgastraining hey dek thanks so much for all your videos i had a question about the aps please if the aps has a diapram inside it how does that work in conjunction with the switch that makes a switching noise when you blow down the tube could you explain about the differential pressure on both sides of the diaphragm as well please in laymen terms please Thankyou
I'm a learning student. I would appreciate if u could answer my question. Some aps switch have 1 2 and 3 on the terminals instead of com no and nc. What do the 1 2 and 3 stand for.
