HVAC VAV boxes
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This is one of the worst demonstrations of what a VAV box is. There are several types of VAV boxes and that was not identified from the beginning. All you really showed was the operation of a heat strip. Call it what it is. What an idiot. Was it a pressure independent box? Single duct? What was the inlet velocity pressure requirement? DDC? Some people know just enough to be dangerous........
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At the begining of the video you say that this equipment removes humidity !
Perhaps it reheats the air back to set point if additional cooling is required to dehumidify the space. Heating the air does not remove humidity.
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Maybe one day you can do piu units
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Thanks for watching and clicking on the ads, too.
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what is this VAV box for? is it only electrical heat strips in there or is there some heat exchanger too? i mostly work on small split heatpumps so i don't have much experience from larger HVAC systems.
Swedediesel 1 year ago
@Swedediesel This particular VAV box has electric heat strips. It has a damper that opens when there's a call for heat or cool and closes when there is no call.
DrZarkloff 1 year ago
@DrZarkloff so it's just an electric heater with a damper that controls the airflow? there is no evaporator or condenser built into this?
Swedediesel 1 year ago
@Swedediesel That's exactly what this is. Some chillwater and boiler water VAV boxes are fan coils that have the cooling and/or heating coil inside with a variable speed fan.
DrZarkloff 1 year ago
very good vid, i had to subscribe to your channel. i wish you would have explained the control board in detail on this vid. id like to know more about the ac - dc or dc - ac, opto's and bridge rectifiers etc. im 25 btw, and only a little over a year into the service side. i love hvacr, just right now its not paying to good. have to start from the bottom i reckon.
death2opposeme 1 year ago
@death2opposeme Thanks for watching. I'll try to do a more detailed video on the control board some time.
DrZarkloff 1 year ago