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Re: O/T three phase motor amperage question
[Re: mopardad]
#2738562
01/31/20 11:04 PM
01/31/20 11:04 PM
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Joined: May 2003
Posts: 6,569 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,569
Downtown Roebuck Ont
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It begs the question if the fan speed was wrong all along, why a problem now all of a sudden? The fan itself is clean, no crud build up on the blades?
Kevin Belt wear Ahhh. I read it wrong. For some reason I thought they changed the pulley size to speed it up or does it have a split pulley like a snowmobile clutch that can be adjusted? Kevin
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Re: O/T three phase motor amperage question
[Re: Twostick]
#2738598
02/01/20 03:16 AM
02/01/20 03:16 AM
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Joined: Jan 2003
Posts: 7,498 Minnesota
Hemi_Joel
OP
master
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OP
master
Joined: Jan 2003
Posts: 7,498
Minnesota
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It has an adjustable split pulley. The tech tried to figure out what changed. He wasn't happy that he didn't have a " smoking gun". but it's only worth spending so much time on. The old restraunt had recently closed, and the new tenant has been getting it ready to reopen. They might have done something. Or maybe it was the belt.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: O/T three phase motor amperage question
[Re: Hemi_Joel]
#2738613
02/01/20 08:12 AM
02/01/20 08:12 AM
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Joined: Jan 2003
Posts: 8,033 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,033
Tulsa OK
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I know on our exhaust fan for our warehouse the belt wear can be an issue. Its not a three phase deal but the belt wears and you never notice how much the fan slows down over time. Put on a new belt and the building moans and creaks when the fan comes back to full speed.
68 Barracuda Formula S 340
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Re: O/T three phase motor amperage question
[Re: Hemi_Joel]
#2738751
02/01/20 03:15 PM
02/01/20 03:15 PM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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I am left wondering if some vents blow down too forcefully on particular tables in the resturant?
If there was enough time for the pulley edges to wear out the belt - then it is highly likely there was also enough time for the blades of the fan to get dirty.
Those “wandering flames” due to rusted and split tubes ought to be checked out after re-checking what your net loss would be after insurance if the building were to burn down. Imagine how many attorneys would chase the case if someone were injured of killed.
Last edited by 360view; 02/01/20 03:42 PM. Reason: Speling
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Re: O/T three phase motor amperage question
[Re: 360view]
#2738752
02/01/20 03:27 PM
02/01/20 03:27 PM
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Joined: Jan 2003
Posts: 7,498 Minnesota
Hemi_Joel
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OP
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Minnesota
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THe first guy who was out there said there was a new belt in the fan cabinet, which he installed. THe second guy said maybe the pulley was worn, or maybe the 1st belt was worn and the second one was narrower or longer. He just wasn't sure. I'll ask him if the fan was clean and if he inspected the heat exchanger. The new restaurant is opening today, we are going there for supper. I hope it's a hit!
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: O/T three phase motor amperage question
[Re: wingman]
#2740207
02/06/20 03:58 AM
02/06/20 03:58 AM
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Joined: Jan 2003
Posts: 7,498 Minnesota
Hemi_Joel
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OP
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Joined: Jan 2003
Posts: 7,498
Minnesota
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CHECK THE HEAT EXCHANGER BUNDLE
We have 24 of the Carrier gas-fired package units on the roof of the school. After 8-10 winters and countless heat cycles the weld-seams of the heat exchanger tubes will rust and split open, causing the flame to start to rollout and the rollout switch to disable the burner. The blower fan will continue to operate blowing cold air, and the thermostat will continue to call for heat, but the draft fan will lock out so no heat. The safety gas valve they found closed may be programmed to close when the rollout switch trips as a precaution. There should be an LED "flash code" you can use to confirm why it tripped out. Or fire up the unit with the side panel off and watch the burners--if the exchanger is cracked the flame will dance in an unstable way and "roll out" will be pretty obvious. If your unit is 10 years old and it has never been changed it is likely due. If you don't see any actual roll out and the flame looks good, the rollout switch itself could be bad--cheap part and super-simple to replace.
Changing the exchanger bundle out is about a 2-hour job for two competent guys--we do them regularly, so we have gotten pretty fast. The size varies depending on the size of your unit--the larger ones can be cumbersome for 1 guy to handle. Our units are 2001 models and are generally very reliable and pretty simple. If something goes wrong in the wintertime with them, 80% of the time it is the heat exchanger reaching the end of it's life. Good call on the heat exchanger, it was split!
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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