6039 Exhaust

[cpmartin2007]

I have looked through countless threads but I have been unable to find a similar issue. I am running a USSC 6039 with the newer 4 button panel. I used this stove all last winter and had no issues with it. Before putting it in service this year I took it out and cleaned everything thoroughly. Took motors off cleaned fins, oiled shafts, bearings, blew it all out with a leaf blower. I thought it was good to go.

It fires up, motors all operate, and burns, produces heat. The issue I am having is the firepot is building up with incompletely burned pellets. Not enough to overflow or starve the fire as I check it regularly, not saying it couldnt but it has not happened yet. I have the FAK/OAK installed. I have tried pulling air from inside the building and outside but it does not really make a difference. Had the manual dampener opened 1/2, closed, fully open and I cannot seem to get the right burn. I have read through the "C" changes from the tech manual. I am not sure if the feed rate is off? I have tried resetting the board, it appears to have worked. But again incomplete burn. The only thing I changed was the exhaust path. Last year I had roughly 12" straight out the back to a 90, 2 1/2' vertical to another 90 and straight out. This year I removed the first 12" section and is now plumbed straight to a 90 and the rest is unchanged. Could this be causing poor air flow out of the exhaust not allowing proper draw?

Furthermore I have read that this stove burns corn or pellets and you need to change based on what you are running. What I have read on here is to push on and then both heat range buttons to swap this. I have been unsuccessful in getting anything to appear.

TIA for any help!

 

[johneh]

I'm not that familiar with your stove but it sounds like a combustion air problem
Burn potholes plugged air intake plugged exhaust dirty and plugged stove full
of ash in hidden places Air leaking into the stove from the door gasket ash pan gasket
do a dollar bill test on gaskets. Others will chime in

 

[ARC]

Could this be causing poor air flow out of the exhaust not allowing proper draw?

Are you saying right off the vent adapter on stove you have the first 90 degree, if so yes that could effect the air flow you could have a ash buildup right there. I would try reinstalling venting the same as last year if possible. If not possible I would then try a higher draft setting using the draft buttons 2 or 3 above heat settings IE HR 5 dr 7 or dr 8. If going to a higher draft setting works then I would go into the C Codes and increase draft C8 and C9. I think you have a draft problem not a feed problem. Keep notes of what your draft rates are that way you can always go back to the ones that work.

6039 4 Digit Board C Codes
To adjust the operation constants, press the hold the MODE and AUGER DELAY buttons
simultaneously for 3 seconds. The display will show “C-1”. Use the HEAT RANGE UP or HEAT
RANGE DOWN buttons to change the constant number (see the list of vales below). When the
desired constant is displayed, press the ON button to toggle between viewing and editing the value.
While editing a parameter, use the AUX again to return to the constant number list. Press the OFF
button to exit the operational constants mode.


 C-8-Draft Fan Level HR 1 (0-500) – This is the draft fan output lever for a draft fan setting of
1. The Default is 230/500.
 C-9-Draft Fan Level HR 9 (0-500) – This is the draft fan output lever for a draft fan setting of
9. The Default is 270/500.
 C-10-Draft Fan Full On at Setting 9 (0-1) – If this parameter is set to 1 (default), the setting
for C9 is used for a fan speed of 8, and a value of 500 is used for a fan speed of 9. If the
parameter is set to 0, the setting for C9 is used for a fan speed of 9, and all remaining fan
speeds are set based on the interpolation between C9 and C8.

Furthermore I have read that this stove burns corn or pellets and you need to change based on what you are running. What I have read on here is to push on and then both heat range buttons to swap this. I have been unsuccessful in getting anything to appear.

Does not work on every version of the control board there are 4 versions. Does not work on mine, I burn mixture of corn and pellets. I changed my C8 and C9 to increase draft when burning mix. At start and end of heating season I burn straight pellets and reset to factory settings even though it will burn pellets on my corn settings. C8 245 C9 285. I think the corn setting also changes the feed rates but I do not change my feed rates to burn the mix.

 

[Jeremy6500]

I second that it sounds like an exhaust draft issue.

On my 6500 there are a couple of small doors to remove to get to the passage behind the burn chamber. Prior to me figuring those out I had issues with pellet build up. If you are 100% sure everything is clean, then increase the draft setting like ARC suggested and report back.

I use a leaf blower to clean mine, except I connect the suction side of the leaf blower to the end of the outside venting and suck out all the ash. This seems to work the best for me.

As far as the corn thing, on mine you you press and hold the Mode and Auger Delay buttons for 3 second to enter the operational constant menu. From there I can adjust if I am burning corn or pellets.....along with a ton of other things.

 

[cpmartin2007]

Thank you for the responses. I have checked the door seal it was rather tight but not tight enough to hold the paper completely. I ended up bending the door latch just a tad until it was tight enough to not move the paper at all. So my new theory is that maybe my exhaust fan is getting weak. I was curious so I took a cheap handheld anemometer and took off my exhaust off so that is was just blowing in my shop. I was getting 3.3 mph on the highest draft setting (9). I am unsure of what this should be from factory. Unlikely anyone else has ever checked that. Would the vacuum switch have anything to do with it? Was not sure if it was a simple on off switch or if it was analog sensor. I jumped it out to verify but its same reading of 3.3 mph. Generally speaking most motors just quit but I also work on larger 3ph motors but I would guess single phase motors would do the same.

The pellets I purchased this year are different than last year, I buy by the pallet and so am kind of at the discretion of the supplier on what I get.

Furthermore, I was reading more forums on here (tons of good info) I did drill out of the holes on the firepot, nothin more than 1/16" to just verify proper airflow. I just can't help but to think that motor is getting weak.

One last question is it possible I am getting to much air? I don't feel this is the case as I think I would imagine the firepot would run out of pellets to burn.

 

[ARC]

One last question is it possible I am getting to much air? I don't feel this is the case as I think I would imagine the firepot would run out of pellets to burn.

You are right to much air and all pellets burn up quickly and fire goes out sometime with to much air it will blow pellets out of pot, this is not your problem. You are also correct blowers usually do not get weak they work or they don't you could put a drop or two of oil on bearings but I doubt that is the problem as you said you oiled them once already.

Did you try increasing draft with the draft buttons? Is your Fak/Oak installed correctly did you remove FAC plug under the burn pot most drill holes in and and put it back on. Is the Fac attached to the rear panel of stove then you have to use a small section of vent to attach rear panel to the hole under the burn pot. You could try to put the Mode button in Manual then control the air flow using the slide damper or taping off part of the Fac opening outside of the house. Manual mode will put the draft fan fully on no matter what heat setting is being used.
Could you go into the C codes and tell us what C2,C3,C8 and C9 are set at?

 

[cpmartin2007]

I feel like an idiot ... but also pretty humble guy lol so I will explain my mistake. When I took everything apart this fall to blow it all out .. give everything a proper lube job etc, I failed to put a witness mark on the magnet, I reversed the polarity of the dang motor. Took this back apart shined up the rotor and stator with some contact cleaner and emery cloth, put back together and now the thing is blowing around 10-12 mph out of the exhaust when measured with the anemometer. Draft setting on "9" now makes it look like a fire breathing dragon. Moral of the story witness mark everything.

 

[ARC]

I feel like an idiot ... but also pretty humble guy lol so I will explain my mistake

Congratulations on figuring it out and thank you for the update, a lot of time we never get to hear how it turns of the Poster will just disappear.

 

[cpmartin2007]

Congratulations on figuring it out and thank you for the update, a lot of time we never get to hear how it turns of the Poster will just disappear.

I'm on that side of the table a lot and its frustrating giving insight, ideas, opinions and then never knowing if anything you offered help solve the problem!

 

[Jeremy6500]

Glad you got is figured out.