MAKE UP AIR UNIT REBUILD (APPRENTICE SERIES)

This is a fun video series, a little change of style every now and than keeps me sane

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[jasonjohnsonHVAC]

Part 2 of the apprentice was narrated perfectly....clear and concise instructions with done Chris

[wilcleno]

Chris the HVACR industry should hire you as a teacher. With your style of teaching every tech would become a master in the trades.

[jthatguys]

We use a similar system to cool commercial greenhouses. We have about 300 ft of wet wall with those cardboard pads. They stink bad when new. There are some newer types made out of plastic that are supposed to be more durable. They use the same thing for commercial chicken houses. It’s not cold, but you do reduce the ambient temperature.

[tylerblack]

Wow, this is honestly the best hvac channel I have ever seen. Love your videos man!

[paulmace]

I had an account that complained of “musty” smell after Arizona dust storms. They had double deep cell deck and crappy prefilters. The evap cooler also acts as an air washer and they were getting dirt embedded in the double deep cell deck. The bleed line is important so that you get new chlorinated water in periods of high humidity. Legionella loves unchorlorinated water.

[demonknight]

I've never worked on evap MAU or any MAU, for that matter. But i have worked on many evaporative cooler over the years growing up in the Texas panhandle and you explained it great.

[kat]

Here in southern Michigan our makeup hast to be tempered both ways. We have a heating an cooling coils.. but units like that we refer to as swamp coolers. But wow day an night difference from before and after!!! That unit was definitely in need of TLC she was dusty dirty… That pump reminds me of the old little giant pumps 😊 As a rule of thumb? I always check all doors for ease of opening after servicing a make up unit. like you I try to shoot for about 5% positive air pressure in the building. If I have to tug or push hard to open the doors? I will go up an adjust my makeup unit.. used to have an egg processing business and 90% of the building was cooled by a swamp cooler . Was a high maintenance pain to keep going and to winterize .. was a good an informative video! Helps expose the northern Tecks to southern climates HVAC units ❤

[DanielDavis]

I'm not an HVACR guy (aerospace engineer) but I find your videos fasinating and informative. That said, it's a giant swamp cooler and I find that fasinating on an restaurant/industrial scale. Normally I'd associate them with small home applications but I've only really lived in humid areas (Florida, Lousiana, Western Washington - Seattle area)

[Syntappi]

I'm not an HVAC guy at all, my profession is electronics and cars. Somehow your videos fascinate me and i enjoy watching them. I've been following you since Covid happened. In my opinion you are great teacher, of course your apprentices need to have certain mindset and some skills to learn it but at least I could already be your apprentice.Unfortunately I live in Finland and i'm retired because of my disease so it's not happening :D

[RayRay-nbtn]

Giving great knowledge and explaining things goes a long way for sure. Especially from a well knowledge tech in the trade for a great trade.

[halverde]

Make-up air should always be Rupp gas fired for winter. Those things were beasts in Alaska. Worked great in summer and winter.
Some stores had just that for HVAC alone.

[doctorjaysuave]

Thank you for being informative, I am in HVAC school and planning to entering into the commercial side. This was so interesting. I learned a lot from a unit I never even seen.

[IamAllanC]

9:30 I love people who say it's cold. 🤣
I live downtown Toronto, and wear shorts when it's -10C (~14F).

[rickmarr]

It's nice to see how things are done and why. Thanks for doing this. I now know why some restaurant doors are hard to open.

[carloshilarionvazquezaranda]

Mi estimado Crhis buenas noches, hoy aprendí mucho de toda tú enseñanza no sabía yo que existieran esos equipos y como siempre apoyándonos para ser mejores cada día de verdad lo valoro y agradezco, que tengan una excelente noche y saludos desde Coacalco Edo de México a todos ustedes deseando que estén bien .

[dallynsr]

SoAz high efficiency hvac installer here.
And I have never seen an actual mau such as this nice example you did here, because here everybody just uses cheap swamp coolers from the local diy store (depot/lowes) and runs them into the ground…a few years, then goes and gets another one. And it drives me nuts how dilapidated people are about restaurant management. This thing looks like a well made unit, and is what I would want for my restaurant if had one. Here we can usually get a 30°-38° drop when it’s not rainy monsoon season, then it goes back to hot humid air that’s maybe 10°-15° less than outside air.
People here seriously don’t even load check their blower motors let alone check the actual flow rate or compare it to the on or off mode and how the doors open or not. lol
I’ve operated and repaired and replaced coolers for decades and have given up with them now due to the lower loads with inverter direct air handling systems, and vfr. And honestly, to me it’s not fair to expect cooks and workers in a kitchen to survive worse than Houston, Tx sunny hot humid day conditions while trying to make our food with little appreciation. So I would provide hvac mua myself. But people running business can be very cheap down here.

[gregmercil]

I’ve worked on a crap ton of swamp coolers up in the high desert for 2 years before I went commercial almost 2 years ago. These make up air units to me are like swamp coolers on steroids. That part that you call a water sprayer tube is usually referred to as a distributor. And yes, those coolers can get disgustingly gross. I remember working on one about 3 years ago at a local church that had green slimy algae growing on the pads, and the unit smelled like rotting chicken. I’ve also replaced celdek pads that were several years old, and were so caked with minerals that it not only blocked airflow but was practically concrete at this point and weighed a ton. It was even more fun when trying to remove these heavy old pads while high up on a ladder. I often had to cut them out with a sawzall. And personally I love that “new pad” smell. I can remember one time getting a service call to a swamp cooler that I replaced the pads on a few months prior, the guy said it had an “electrical burning smell” when he turned the thing on for the first time since I replaced the pads. Turned out it was just that new pad smell. I inspected the unit anyways just to make sure, and explained to the guy that it was just the new pad smell. And assured him that the smell will mostly go away after about a week of usage. And yes, you did a pretty good job of explaining things.

[ni_wink]

Evaporative coolers work great when it’s really dry out, we have a place out in Joshua tree CA, and it only had evaporative cooling, even when it’s 110, it’s so dry the latent heat of vaporization can drop the outside temp down to 80 deg fairly easily, if it gets even mildly humid out that cooling almost disappears lol. If it’s down 5-10% humidity it feels amazing anything above that it pretty much feels like wet outside air 😂 plus the extra humidity really helps your sinuses in the super dry desert air

[Markmith]

Really enjoying your apprentice series, didn't realise these were a thing as we dont use them in the UK, our setups are different.

[PDAPIPE]

I'm not even in this field of work but find this very interesting to watch