Noisy new oil burner!

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Old 12-11-10, 11:43 AM
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Unhappy Noisy new oil burner!

Hi! I had a new Weil McLain OB installed a few months ago to replace a leaking Burnham V7. The "burn" is fairly quiet, and the circulator is quiet, but the motor and/or coupling is very noisy! You can hear it/them throughout the whole house! It's a WGTO5. Is this the nature of the beast, or do you think a defective motor or misaligned coupling? I've been thinking of taking the Riello set-up from my Burnham and putting that on the boiler.
 
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Old 12-11-10, 12:18 PM
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I would suggest you call your installer. If there is a problem with the motor, coupling, or pump it should be covered under warranty.
 
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Old 12-11-10, 01:44 PM
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You said:

and the circulator is quiet, but the motor and/or coupling is very noisy!
Are you talking about the OIL BURNER MOTOR? or the CIRCULATOR MOTOR ?

Did they re-use the old circulator?

I can't really imagine an oil burner coupling going bad such that it make so much noise you can hear it throughout the house, and the burner continues to operate with no problem.

You might have a problem with the circulator coupling...

Whatcha think Grady?
 
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Old 12-11-10, 01:52 PM
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I recon it could be a circ coupling if it were a B&G or Armstrong with the old 'X' style coupling but why would they reuse an old circ when a new one comes with the boiler??? MrPop says "the circulator is quiet". Only thing I can think of is if the burner is an AFG, the fan is a skintch too close to the air guide. They will make a racket. On the other hand, he says the burn is fairly quiet.?????????
 
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Old 12-12-10, 10:34 AM
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The blower/pump motor. Circ is quiet. Maybe I'm just spoiled after previously having the Riello. I do everything myself, and there's no way the clowns that installed the boiler are gonna touch the thing again! Maybe that's the way the motor is. I figure I'll change it out and keep this one as a spare. If I ever decided to install the Riello I kept from the old boiler, there shouldn't be any problem, right? I'm running (?) a 1.50 nozzle now in the WM, and the Riello will take up to a 1.50.
 
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Old 12-12-10, 10:42 AM
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Maybe that's the way the motor is.
What kind of noise? Rattling ? Scraping ? Banging ? ... or are you just hearing the 'air noise' ?
 
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Old 12-13-10, 08:16 AM
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Hard to explain. Like from the windings, sort of a muted metallic clicking (?) which seems to be magnified by the piping. Not the air noise (which is definitely loud), not a bearing. It may just be the way that particular motor sounds. It's not smooth running! I just was wondering if any one else with a Weil McLain noticed any noise with their motor.
 
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Old 12-13-10, 04:07 PM
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With all of the discussion about a noise, we've yet to find out exactly what kind of burner we're dealing with. I have been presuming it was a Beckett. MrPop, can you confirm the brand of burner?
 
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Old 12-15-10, 08:34 AM
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Sorry! Yeh, I thought about that afterward! Beckett.
 
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Old 12-15-10, 04:02 PM
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It could be the motor itself but I tend to think it more likely to be the burner fan. It would be worth pulling the motor & fan to do a visual for any signs of scrapes. After the look see check each of the fins to be sure they are tight. A loose one will cause a racket & eventually fly apart. Also make sure the fan is tight to the shaft.
 
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Old 12-16-10, 07:46 AM
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Thanks Grady. Will do. Over and out!
 
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Old 03-21-11, 08:51 AM
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Hi, I'm back! The cause of the noise was the plastic coupling, joining the motor shaft and oil pump shaft, was bent for some reason! Maybe, from sitting in storage it became warped, possibly because the shafts aren't quite lined up? Put a new one in, which appears straight, but there's still some noise, but nothing like before! Does anyone know if someone makes a flexible coupling for the AFG burner? Thanks!
 
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Old 03-21-11, 02:40 PM
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Hi MrPop, there really isn't a whole lotta 'play' in the mounting of the pump and motor, so I wouldn't expect a lot (if any) of misalignment. I can't see how storage time would warp the coupling...

The length of the coupling itself is rather critical. If it's too long, it will 'preload' the pump and motor shaft and they will fail prematurely. If too short it will rattle around and fail itself. I believe the correct dimension is 3-13/32 " (3.40625")

Also, the blower wheel setting on the shaft has to be exactly correct distance from the motor.

You put the new coupling in? Was it a 'universal fit' that you had to cut? or pre-cut for the burner? Did you check the blower wheel for loose fins? Was it set the proper distance onto the motor shaft and the locknut tight?

Here's a source for the pre-cut coupler:

Patriot Supply - 2454
 
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Old 03-22-11, 08:03 AM
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The coupling is a piece of hard plastic tube (the old one looked like a banana) of a specific length. The ends fit pretty snugly on the shafts. I started with replacing the motor, as I figured I would have a spare anyway, and that's when I discovered the bent coupling. Everything else is ok, and everything is set to spec. as per the instuctions that came with the motor. The little bit of noise isn't all that bad now. I'm gonna throw a little "jiz" in the ends of the coupling just to make things ride easier. Thank you for your help!
 
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Old 03-22-11, 08:07 AM
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Ps. Yeh, that's the # of the part, which I did get from Patriot.
 
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Old 03-22-11, 03:45 PM
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Pop, I don't know that I would put any kind of lube on them plastic parts. Some lubes will attack the plastic and cause it to fail.

Did the banana coupler appear to be the correct one? I wonder if someone installed the wrong too long one?
 
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Old 03-22-11, 04:00 PM
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There's a little slop in the pump mounting. You might want to loosen the bolts slightly & move the pump around to see if it quiets down. Works sometimes.
 
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Old 03-23-11, 08:47 AM
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Trooper, yes it was the right coupler. Grady, thanks! Didn't think about the fact that there might be any leeway in the pump mounting, mainly because there's absolutely no freeplay (?) in the motor mounting. Trooper, Grady, it's good to know there are people like you, that care and take pride in their work, not like some of those other so-called plumbers/ heating specialists out there!
 
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Old 03-16-14, 10:50 AM
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3 year old thread.... Closed!!!!!
 
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