So they called saying there was a loud vibration from the exhaust fan and all the screws were falling out, there wasn't much I could do for it but in the end it all worked out.
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Please consider supporting my channel by
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HVACR VIDEOS
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440 - 184
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00:00 SPONSOR CARD
00:10 THAT IS NOT NORMAL
03:32 WHEEL INSPECTION
06:32 REPLACEMENT INFO
09:45 I'M BACK
12:00 ROOF CLEANUP
13:25 1 2 3 PLEASE DON'T BLOW UP
16:03 HEAVY DUTY HINGE INSTALL
19:53 CLOSING WORDS
Is it possible the name plate amperage includes the VFD logic, etc ?
does that model of vfd have internal temp sensing? if so you can read off what the temp is and compare that to the manufactures specs. thats a good way to show a customer the work is required.
If the winds are not abnormally high and it's still tearing the metal capping off, the installer isn't doing their job correctly…
If you're bothered by the flying metal, you might want to give Building Code Enforcement a call and let them know that the capping on that building may not have been installed according to Minimum Code Requirements…
That fan is almost as gross as those raggedy-ass evap coolers sitting next to it.
You mentioned that it was a chain store. Do they have in-house maintenance that could keep a spare motor since they have several stores? This way on a Friday night, you can call in-house maintenance and they can get a new spare at their convenience. Being a chain, I can see them ordering this same setup many times. By having in-house hold onto it, it spreads the cost of keeping the spare between several locations.
Off topic but a question. I follow a lot of tradesmen and small businesses channels. Were you the one given a shout out for sending a shirt to a Wisconsin concrete contractor Victory something, within the past week? Pretty cool if it was.
The quality control on new equipment is crap. Pulley set screws and electrical connections are not torqued to specs, nuts are left off, alignments are so far off, and even balancing weights on blower wheels aren't crimped on properly. This is the kind of crazy crap that technicians have to deal with when more and more stuff is being made in China, Mexico, and who knows where else!!!
Relocation of the vfd is bad for the drive , farther away from motor is going to create large amounts of emf and losses especially with a high carrier frequency
Greece maintenance is no joke. I worked in a restaurant where it was bought out by a franchise and the new owner decided to save a buck and cut back on greece maintenance, which resulted in a roof fire.
That caused the restaurant to be out of commission for almost 1 year. Service area Nepean??
Big picture Chris. I noticed that bolt sticking out much earlier. Glad you got it. Seems like there's no more QC at manufacturers any longer. Service area Orleans??
helicopter helicopter
I assume the bearings on the old fan were fine because they were getting greased regularly? 🤣
Not crazy about putting the VFD inside the fan. Heat, dust, grease… "Let's put an expensive part in an environment where it will fail prematurely, during a chip shortage." 👌
We don't have to worry about grease buildup one of our exhaust fans at work. I first noticed it wasn't working in October 2021, and here we are just about to enter November 2022, STILL hasn't even been looked at. Our ceiling tiles over the ovens are a beautiful golden brown. 🤮
First time we see employees in full instead of shadow figures. (other the your father). Just to remind you.
Silly question but is it feasible for the restaurant company to stock the direct drive parts in advance in a nearby warehouse or something so you could u pick it up when one goes bad? Is it just not economical to do that?
Your Videos are always so detailed and easy to understand.
I do enjoy and learn from them
quite a lot. Please keep them coming and i keep watching. Blessings!
Best part about the loose nuts and screws is that if you look at the fan's data plate, it has a QC Passed sticker below it.
You may already be aware of this, but I figured I'd mention…
I was always taught to keep the disconnect before the drive to prevent accidental damage to the drive, like mounting everything locally in a fan cooled cabinet. However, if you have to put a disconnect between the drive and the motor, I think you have to reprogram the drive stop configuration to freewheel(instead of the typical ramp) when the dry contact opens, so the drive doesn't try to ramp the motor down. I don't know if every drive manufacturer is the same on this though.
I mean at what point does that become a fire code violation storing a couple pounds of grease in an electrical appliance that is vibrating and heating up its bearings. Straight up tell them that if they don't clean it they better be prepared to deal with the building burning down when one of those fans decides to ignite the grease and set the ducts on fire.
The cable on the load side of a VFD has to be shielded and is limited in length according to the VFD, FYI.
Ugh. I can tell my employer to buy Allen-Bradley drives and they'll listen to me, so I'm inclined to sneer in a elitist way at these "value-priced" (as in, "anything other than Allen-Bradley") VFDs. I understand it's a balancing act on the manufacturer's part, and they're being pushed to keep costs down while they're being pulled to do energy efficiency. Knowing you're going to have to move a drive because it's the minimum viable option (which never ends up being actually viable) must make you want to bang your head against a wall.
I work in the Coachella valley as a residential technician/installer. There's something about those 100° + days that I miss during the fall winter time. Call me crazy haha.
Wow, you can really see the vibration from far away
I never saw a Lenze VFD fail in the last 3 decades, but mounted in this stupid area I am not sure how long even a Lenze may work until it begins to fail. Every VFD belongs in a closed cabinet away from all the greasy air or even better in a room inside the building with AC, in the basement or at least not hotter than 25°C in this room. This will make the VFDs last several decades if sized properly. Are you in Ottawa ?
Aside from damaging the fans, that grease build up is a hell of a fire hazard! I hope their insurance company hasn't found your videos!
Good staff Chris
Greece one
But that is restaurant work that for sure
Great video my dude! I do commercial pm's. I have come behind hood cleaners, and have found the EF hinged completely open 🤦♂️. As soon as I arrived on site, and immediately was asked buy the restaurant manager "Why is there water coming down through my hoods!" It had rained earlier that day. Good lord!
Having a vfd in the vent hood, super hot greasy spot… How long does that vfd last? I imagine not terribly long.
I used to be a fan cleaner and the time line of when a exhaust system gets cleaned depends on a few things: they type of cooking equipment, the type of food, the capacity on the establishment, the season length, the common weather conditions, and the biggest one of them all is the City Fire Pervention Bylaws <—— equals Minimum cleaning intervals
POV: There actually is a helicopter in the exhaust fan
Hi UK will you something called an inverter and power factor correction this cuts down the amount of power you actually use roughly 25% on a 3-phase machine you will save a lot of money
Chris I remember cleaning blower wheels like youmention dirt keeps them balanced like that for while. Then I clean the wheel it's out of balance I'm like huh? But that's what happens like you mentioned like of maintenance. Stay safe thanks.
739 Thumbs uP
I do not miss restaurant work.
Is there a market for temporary replacement fans that can adapt to a variety of curbs and run at a variety of flow & velocity rates? AKA install while you try to procure replacements..? Are you in Barrhaven ?
How would the cleaning cost, say every 6 months or so, compare to letting it go and replacing every 10 years, or however old that thing is? I'm thinking like a commercial slumlord here. They usually just want it to run until it dies and deal with it then.
Does a VFD even make sense in this application? It seems like these fans will be set to a constant speed and left alone. Having a soft start is nice though..
During replacement of a roof ventilator which is so large he needs a crane Chris says “I’m not a big fan.”
Hahah 'I wonder what these nuts I found are for??' Jeez how are they going to send a new fan with loose bolts and nuts
The "extra" .6 amps is probably for the VFD's power draw?
Where do you order super hinges from? Allied and united here said they cant get them Service area Ottawa??
Greaae burns nice too.
Another great video bro keep up the hard work
This video is definitely missing some Fortunate Son at the beginning Are you in Nepean ?
Seeing that poor VFD inside the motor compartment of that fan
Holy smokes, which person came up with idea?
That’s a setup for failure
Well at least it was still attached and "functional" when you arrived. 🤪
Spaghetti condensate lines 😂😂😂😂😂😂😂😂😂😂😂
nice hinges Are you in Orleans ?
Great and professional info. as usual. Thanks Chris.
Hey – US people are learning about direct driven fans finally. No more belt issues, but maybe VFD issues… we'll see. Are you in Kanata ?
I suppose that Exhaust Fan was Terminated by lack of maintenance.
camera man flies a helicopter (in my vison) Service area Barrhaven??
Are there any chain driven fans? Don't chains last longer?
Phase rotation does not matter when using VFDs. (Although, it is a good praction to have the rotation matching wire color or terminal numbers).