Make up air not working

[@RalphMercuroMusic]

This showed up in my feed a year after it was posted... I maintained a bunch of these years ago. They were installed in a bunch of fire houses. The electrode assemblies are considered a maintenance item. It's cool watching you figure this stuff out in real time. I remember moments of myself going through this stuff back in the day...

[@christiansommer914]

1min in, and I'm thinking to myself, didn't I just see Rick make a video just like this with the same unit😵🤯

[@srabjr1]

Right? I skipped over it at first thinking I had already seen it lol

[@royamberg9177]

Those are a kinda a different thing to work on. Takes a bit to understand there wiring diagram. I have learned you can diagnose almost everything from the terminal strip. Up here where we have snow storms lots of blowing snow. That exact burner control will get snow melting on it it gets wet and I don't have to say anymore lol. The holes in the burner generally need a drill bit run through them yearly to remove rust. I'm sure it's from blowing snow.

[@jeffreykubiak5126]

Thanks for Video .Helped out work on Ruup industrial side make up same unit pretty much! Stay safe out there thats thing with troubleshooting about pressure switch we get caught in one area I forget need negative to close oops got door open. As Chris says big picture . Make up units are challenging cold .Cup of coffee helps me gather my thoughts. Covered your butt ignition assembly and transformer .Watched it twice.

[@marknaravas318]

“Assorted do-hickys “. I like the accurate description.

[@markcaldwell1245]

Good job. Great work showing troubleshooting using the wiring diagram.

[@curioushvacguy6876]

Thanks 👍

[@edilsonserafim4784]

I know it had been 3y but your videos are always very well explained and professional

[@electroshed]

So wait, that unit blows its combustion fumes into the building!?

[@craighvac1808]

Yes, the make up air also has to have an exhaust fan with an air proving switch in series with the make up air unit, so the exhaust fan must be running for the make up air to fire up

[@craighvac1808]

*in series with the control circuit of the make up air

[@springws14lbss]

These are commonly used in kitchens as make-up air for the exhaust hoods, so the air being brought in usually goes right back out very quickly.

[@HVACRDUDE]

It has 100% combustion its 100% efficient. Bc of the amount of outdoor air entering the burner not bc the exhaust fan is on..it doesn't matter..they ha e these on huge warehouses...

[@JA-vy1gp]

Just worked on one of these today at a commercial GYM building , me and the senior tech I was working with also asked the same question lol , and I learned the burners don’t light up if the door is open lol thanks for the video man great job figuring it out 💪

[@kangaroogod]

As a resi guy I have never seen one of these.. pretty simple and cool setup.. I have already stole the terminology “blinky light” from you from a previous video and used multiple times... I will also be adding thermomistat to my lingo with your permission :) thanks for the video

[@curioushvacguy6876]

Glad you like it!

[@12pullz]

Good video make up airs confuse the hell outta me sometimes

[@beardowns8050]

When I quote new filters I like the 2TE97 filters. Sometimes I find those so clogged I just replace.

[@RayRay-nb7tn]

Nice sequence of operation of a make up air unit. Good way to teach a tech to use a meter and read a schematic.

[@curioushvacguy6876]

Glad you liked it!

[@TheStrawhatboy-s7e]

Great video brother keep up the good work and keep teaching us like you always do God bless you😊😊😊

[@HVACRSTRONJAY]

great video and troubleshooting bill.

[@joecorbin5158]

Just experience talking... it’s a good idea to pull the entire burner and wire brush it... have had that bite me in the butt. Intermittent ignition problems. Good work stay safe

[@Eddy63]

Nice troubleshooting vid Bill ...

[@KG-yn9qi]

Happy New Year! Good job great bearded one!

[@joshstevens9826]

Flame looked terrible. Clean out orifices in he manifold and inspect the burner for cracks in the metal. If there are cracks in the 'V' shaped piece it will disrupt the flame profile

[@55bigblockcid30]

The burner holes need drilled out because it has uneven flame across the burner.Full of rust.

[@curioushvacguy6876]

thanks for the tip

[@RichGT350r]

Thanks Bill! Happy New Year!

[@gregbowman3598]

Good one Bill 👍

[@Tonyhvac]

Good class sir 👍🏾

[@throttlebottle5906]

dirt flame sense rod and maybe uneven burner/pilot flame. the typical crap on those

[@josephmettes9147]

Todays episode of Curious HVAC Guy is brought to you by the letter 9! 😂 Great video as always Bill! Definitely learning some stuff with you and Rick posting videos on the Captive Air Units.

[@curioushvacguy6876]

Boom!

[@twistedcandlecompany]

Great video and thanks for sharing Happy New Years

[@actechformallyyomama746]

I had one of these on a lab. The manager of the lab told my installers where to put the vents. This included vents on the end caps. The MU air unit was intermittently shutting down on static pressure issues. I go into the lab and the manager is bitching at me due to repeated issues. I look at the duct work and ask him why the told my guys to put vents on the end caps. He said “that’s where I work”. Then I say “you caused the problem”. I remove the vents and cap them. No more problems. You can have too much supply on those units. Stay safe.

[@curioushvacguy6876]

Interesting issue, bet that was a satisfying find

[@j.r.1223]

@@curioushvacguy6876 The longer I'm in this trade, the more I find I need to learn.

[@eriereeftroller6037]

I worked on the exact same unit that was installed for a paint booth. It couldn't satisfy set point. Never worked on one before that day. OMG it sucks to learn under the gun. Luckey they weren't in dire need of it, went home downloaded the manual, watched a couple videos to understand how to check gas pressure differential....ended up being supply regulator was never big enough from the install.

[@darekcieslik6838]

Good job! that's the way to do it get the meter out and read schematic.

[@GrahamBartle]

Had same door thing on a very similar unit. Took a minute to figure out the chamber was monitored for pressure.

[@Robyrich2377]

SKI Matic... good one.

[@kyleh1974]

Why did you change the ignition transformer as well, out of curiosity?

[@Uncle-Duncan-Shack]

Was just watching one Rick did, I seem to remember that the turnadoodle for the toastiness was too low. The customers face: Your heater needs a spark plug........................................

[@DW-bo3qw]

PTFI is pilot trial for ignition I believe

[@SuperUPLIFTER]

Do you have to let those filter dry before putting them back?

[@kristoferdixon5788]

Have you came across a code on a Greenheck with a 4-1 code purge cord problem?

[@huls320]

Probably just needed the pilot assembly cleaned. Very rarely does the whole assembly need to be replaced.

[@joeneal21]

Your red lead is connected to the ground?

[@syedbasheer8210]

Happy new year🥳

[@jonnymac31]

Sweet dude.

[@GuitarFury17]

this reminded me how much I hate captive air wiring diagrams

[@scottyloon]

PTFI- pilot trial for ignition

[@oliviaqiaouou9761]

May I ask about the make up air unit? My unit when the weather below 15 degrees than the burner it’s not working. Can’t find the reason, already change the flame and gas valve, but until same problem. If you know what happens, Please let me know and thank you

[@throttlebottle5906]

"ther-mom-ostat" hehe @ saying it that way on purpose or tongue twister, still funny :)

[@theinfamous1523]

Our makeup air stop making the usual noise it’s kind of quiet and sitting could it be that it’s not working ? We haven’t heard any complain so far .. Should there be a concern ?

[@deanpeterson5387]

We have a captive air unit the heat will come but it doesn't temper would that be the sensor or controller

[@matthewgregory8218]

I would not even be sure if you need hear in the kitchen enough things make it really hot in the kitchen

[@houbal7350]

toxic gasses ??

[@mikefreedom5612]

Good video

[@curioushvacguy6876]

Thanks

[@Ted_E_Bear]

Happy New Year 2021 ! I can also read the Ski-Madic

[@harrydickson4575]

👍👍👍

[@GatheringSticks]

You have they same voice and accent of a famous KZbinr I watch religiously. " Mustie1"

[@nilugajjar182]

Thanks sir

[@carsonglauser9383]

Skeematic, noice

[@instrumenttech4220]

Not to be an ass PTFI pre trial for ignition and you kinda had the door off

[@daveg8918]

Bill quit trying to do your art work on roofs. Graffiti is not welcomed on the building walls!!! Lol

[@kevinconte9343]

PTFI pre trail flame ignition

[@steveblake8766]

#205 Thumbs uP