Harman PB105 Owners

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I have my feed rate set at 4.5. I've found that setting the feed rate at lower settings will cause the flame to not wrap itself around the heat exchanger tubes like its suppose to, plus I burned more pellets trying to bring the boiler up to the high limit setting. I have my low limit set at 160*, High set at 180*, 20* differential. If you have more than a 20* differential, if you have a couple zones that call for heat at the same time, the time it takes for the pellet boiler to fire, I would guess that the water temp will drop around 10-15*
 
I only have my one main zone at the moment. How far should the flame go? all the way around all the tubes Does the Outdoor sensor automatically choose Feed? No mater what you set it at? Do you use the out door sensor?

I have my low at 140 and High now at 170

I set the feed to 4.5 and the flames would wrap around the first 2 tubes kinda hit the third and go down to the first one of the ones that go down towards the ash pan. Then other times it wouldn only hit the first 2
 
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Chris04626 said:
How many pellets do you burn a day/week at your settings?
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The most pellets I've burned in a day is 2.5 bags, around 8.3 ton per year for the past 6 years heating 2200 sq. ft. and DHW all year, summer included for DHW. I dont use the outdoor sensor because using the sensor for DHW in the summer months didn't work out. When my boiler fires to maintain my settings the flame will wrap itself over the upper tubes and a couple of the lower ones, as the boiler is reaching the high limit setting, the fire will decrease. The feed rate somewhat determines how large the fire is in the burnpot. The feed rate, depending on the length of pellets being used, should be set so as unburned pellets are not being pushed into the ash pan. I found that less pellets will be consumed with a higher feed setting, a lower feed rate results in the boiler running longer with a small flame.
 
im trying to play with the settings to get it running as efficient as it can with the least amount of pellets. Im burning probably a bag a day right now using it for hot water and a hour or so with the thermostat calling for heat/

My house is roughly 2000 sq ft BUT there is only heat ran to the main floor. None to the 2nd floor. We replaced all windows over the summer from the original 1978 ones lol

What brand of pellets do you use

Right now im using Fire Side Ultras
 
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Chris04626 said:
also i read something about dip switches what are these and should they be changed from factory setting?
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Last spring through this fall I burned Fireside Ultras to heat my DHW usage, I'm now burning Vermont Wood Pellets. The first 3 dip switches, only these 3 to be concerned with, control the quanity of pellets fed into the burnpot at start up before ignition. From left to right I have mine set #1 off, #2 on, #3 on, off is the down position. I don't know what your factory settings are, I have mine set to feed a smaller amount of pellets into the burnpot prior to ignition, fires quicker with less smoke.
 
im assuming you need to shut the power off to the stove before tkaing the control panel off? Is your temperature on top accurate? I had mine set at 170 and i went down staiurs and it was readiung close to 190 but and the thermostat was set to 70 and it was 68 in here. Temp guage on oil boiler was reading 135
 
Chris04626 said:
im assuming you need to shut the power off to the stove before tkaing the control panel off? Is your temperature on top accurate? I had mine set at 170 and i went down staiurs and it was readiung close to 190 but and the thermostat was set to 70 and it was 68 in here. Temp guage on oil boiler was reading 135
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Yes, shut the power off. My pellet boiler and the oil boiler, maybe a 5* difference in the temp guages. If the PB was up to 190* and the OB temp was at 135*, I would be concerned that something is wrong with the flow between the boilers.
 
Harman Dipswitch Settings.jpg
 
Off,Off,On - I have the finned ignitor. I have had to replace my burn pot at least once each year since 2009. I believe my next one will be number 6. I installed mine in December 2008.

I am going to try setting mine to Off, On, Off to see if this will help with the amount of smoke upon start-up.
 
Do you use bulk or bagged pellets?

I use mostly bulk. I do not screen my pellets at all. I am wondering if sometimes I get more fines and this causes some of the problems with the amount of smoke. If the fines are plugging the holes in the burnpot and not enough air is able to get through, I believe this would cause more smoke.
 
ok i found it, mine is on the front side of the control panel, if you cut out a piece out they are visible without taking the panel off. Mine are by default off on on

Any suggestions on what to set them to to try to avoid so much smoke at start up?
 
Looking on the table above, you are already at the lowest setting for the auger run time.

Maybe someone else will have some suggestions.
 
No. Off, off, off is the program default. Off, on, on is the program default minus 64 seconds.
 
Another issue i seem to have is the temp guage on the pellet boiler seems to be off. I have max set at 170 but it didnt shut off until about 185

Also when my thermostat is calling for heat and the pellet boiler is running the temp guage on the oil boiler is always alot lower than the one on the pellet boiler. Is that normal? Like pellet boiler was showing 185 and oil boiler was a little over 140

Does the speed of the circulator going to retun of pellet boiler effect anything? Right now its on the middle selection.

This thing is frustrating, getting to the point i just wanna have them take it out and sell it and go back to oil. Not knowing if its running correctly is driving me nuts, find myself going down to check on it all through the day when im home. Seems to take a ton of pellets to get it up to temp and seems to cool off quick and fire back up
 
Chris04626 said:
Ok i had the temp on the boiler at 180, we left the house for a couple hours with no hot water running or heat on, we came home and the boiler temp was back to 140 and the boiler turned back on. What would of caused it to drop 40 degrees?
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Do you have the low temperature setpoint set at 140 degrees F? If there is no call for heat, the boiler will not go to a high fire condition until it reaches the low setpoint. Set your deadband closer together by raising the low setpoint knob to a higher setting and closer to the hight temperature setpoint setting.
 
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