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Classic Bay auger turn backwards and then off
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TOPIC: Classic Bay auger turn backwards and then off

Classic Bay auger turn backwards and then off 1 year, 5 months ago #13614

My stove starts normal, fires up, then after about 10 minutes shuts down

Snap switchs are good, convection fan starts at 145degrees, I jumpered snap#2 , no change.

TC is ok, reads 250mA when the fire is hot.

Jumpered the thermostat, no change

The auger is running backward at times, and making a noise when it does. Should a Quad auger ever turn counter clock wise? Should I replace the capacitor in the motor connector?
Quadrafire Classic Bay 1200, into its 4th season.

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13615

  • kappel15
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Hi Joe, and welcome to the forum. The only quad stove that will turn backwards is the AE, to try and clear a jam. You are right in suspecting the capacitor as its job is to keep the auger turning one direction. They are around 12.00. Hope this helps.kap
QuadraFire
Trained Tech.
Sante Fe
Mt.Vernon AE
Kan-Burn Shur-KleenII Kapkleaner

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13617

Does anyone know the size of the capacitor? Wondering if can buy one in Radio Shack while I wait for the replacement online. My dealer is over an hour away.
Quadrafire Classic Bay 1200, into its 4th season.

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13618

  • kappel15
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Sorry, my knowledged only goes so far. But i know there are a few on here that do. If you do a search, i think they even posted. kap
QuadraFire
Trained Tech.
Sante Fe
Mt.Vernon AE
Kan-Burn Shur-KleenII Kapkleaner

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13648

  • tjnamtiw
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Joe was over on the other forum too. He ordered one on line and got one coming from his dealer. He'll have a spare, which is more than I can say.
The past is only as far away as the last breath you took.
Quadrafire Sante Fe Insert
Quadrafire Castile Insert
Greenway Pellets
Ritetemp Home Depot $25 programmable thermostat
Sopkainc.com Royal 720 wood/coal cook stove

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13667

Back ordered at Black Swan in CT. I called Woodheatstoves.com, they touched the part, and I ordered from them. I don't think the dealers stock a lot of inventory, and when the season hits, its first come first serve. Hopefully I'll get it by Wednesday. If you have a Quadrafire stove, order one to keep one on hand, if you plan to own your stove more than 5 years, its probably a good investment.


Now why does the circuit need a capacitor. I suspect that the motor in the pellet stove is an AC Induction Motor which produces torque when the angle between the alternating magnetic field produced by the stator is greater than zero. This is called slip. The article below shows how a capacitor is often included in series with one of the stator windings so as to introduce a phase shift in the stator magnetic field to increase the torque. There are also systems that only include the capacitor in the “auxiliary winding” at start-up and switch the cap out with a centrifugal switch in the rotor. See below


www.allaboutcircuits.com/vol_2/chpt_13/9.html


I imagine that a shorted cap would reduce the torque significantly and an open cap might do the same. If the cap were a start-up cap then the motor might not even move.

Why does it sometimes move backwards? I’m guessing because it has been a long time that I thought about these things.

1. In an AC-induction motor, the excitation of the stator coils causes the magnetic field of the stator field to rotate.

2. This rotating magnetic field induces currents in the rotor windings.

3. The current in the rotor winding produces a magnetic field.

4. The when the fields are not coincident there is a torque. When the torque is equal to the drag, in the steady state, the rotor moves at constant speed.

5. When the angle between the two field is positive (positive slip angle) there is a positive torque when there is a negative slip angle the torque is negative.

6. The presence or absence of the cap or a short in the auxiliary winding will affect the phase of the stator magnetic waveform relative to the rotor.

7. I suspect that with a shorted cap depending on the load and the normal “phase lead/lag operating point” one could have the stator/rotor slip angle positive rather than negative with the cap in place so that a negative torque is applied rather than positive, hence the rotation in the opposite direction.

8. If I really knew this stuff I would be writing Wikipedia articles.
Quadrafire Classic Bay 1200, into its 4th season.

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13672

  • kappel15
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All i know is it is mainly to keep the auger turning in the same direction.Electrical is not my strong point.
QuadraFire
Trained Tech.
Sante Fe
Mt.Vernon AE
Kan-Burn Shur-KleenII Kapkleaner

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13690

  • tjnamtiw
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Like the guy on the Ford commercial says, 'It's magic'.
The past is only as far away as the last breath you took.
Quadrafire Sante Fe Insert
Quadrafire Castile Insert
Greenway Pellets
Ritetemp Home Depot $25 programmable thermostat
Sopkainc.com Royal 720 wood/coal cook stove

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13765

Got the replacement kit. Problem solved. Stove seems like its running fine.

Here's a video of the replacment:

Quadrafire Classic Bay 1200, into its 4th season.

Re: Classic Bay auger turn backwards and then off 1 year, 5 months ago #13767

  • kappel15
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Glad you let us know how it went. Glad you are up and running. kap
QuadraFire
Trained Tech.
Sante Fe
Mt.Vernon AE
Kan-Burn Shur-KleenII Kapkleaner
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