Hi Chken,
Thanks for the quick response,
1. Yes the stove thermostat goes up, my electrical thermostats in the rooms go even beyond 35 to 39 degrees which is unbearable and need to shutdown the stove. So yes the stove thermometer does not remain within the 1 degree. I did notice if I unplug the power chord on the unit when cleaning it, the next startup it seems to stay more stable but after the next consecutive startups it goes out of whack. I also noticed the flame is always high and pellets are always feeding which uses up a bag within 8 hours, I use P5 setting according to dealer they claim it will run more stable but I also tried it on P1. I also find it leaves a lot of ash and I am using Lauzon hard wood which should be around .03 ash.
They claim the Piazzetta thermostat is like a water thermostat which is not as precise as the electronic base board Aube thermostats.
After 24 hours the pot becomes pretty full and causes issues for next startup. I need to scrape everything out and it is pretty black and packed.
3. Yes. Picture provided. They tell me to use a Shopvac from the outside. Also I had a lot of ash come out of the tee after about 15 bags. The black dust was everywhere.
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1) I'd try two things, first, I'd try moving the stove thermostat wire around so that it reads the room temp correctly. If it's reading too low, I'd more the wire so that it's right next to the metal jacket of the stove. The stove jacket should be warmer than the back wall, where the wire normally is getting a cold draft.
If that doesn't work, then an external thermostat is required. Other threads here have recommended different external thermostats to use with a pellet stove.
Anyhow, fixing the temperature should be an easy fix, with moving the existing thermo probe around, or using an external thermostat.
As for power setting, if you run on P5, and it never reaches your set temp, as you describe, it should eat up a 40lb bag in 7 to 8 hrs. Clearly, it's working as described, since your stove never cycles to P1 because it never reaches your set temp. As answered earlier, you need to move the temp wire. I'd tuck the wire into the decorative slices in the metal on the right side of the stove, and have the probe just an inch from the metal. That should keep it warmer.
Will P5 run more "stable"? No. Not sure what they mean. I typically run my stove on its lowest setting that allows it to heat the house in a reasonable amount of time. If the temp is about 0 celsius, I'll use P3, and even P2, if I'm using a particularly hot pellet. If it's colder, P4, and if it's really cold, then P5.
If a setting is leaving more ash, then the air for that setting needs adjusting. An efficient stove can operate just fine on all its settings, but your dealer should use a manometer to adjust the air correctly. You can do it to, but when the dealer installed it, he should have used a manometer to adjust it.
My Piazzetta thermostat works just fine, it seems to be electronic, so I'm not sure what that means.
If your pot is becoming full of ash, your air needs adjusting. I base my scraping on bags of pellets burned. I can easily go 3 to 5 bags between scrapings, and I don't expect anything in the pot. Maybe a thin biscuit with holes, but usually just accumulation up around the rim. Of course, it's recommended to scrape once a day, but once you get to know your stove, and IF your stove is adjusted for optimal efficiency, you can easily go 3 to 5 bags between scrapes. Right now, with the temps pretty moderate around Maine, I may burn 5 bags in a week, and so I haven't scraped in a week.
3) The duravent T seems just a little lower than my Excel T on my stove. I know there's not a lot of room under my T, but I can get my fingers under there and undo the screw and drop the plug. Cleaning the T by opening it is crucial because a lot of ash accumulates right at the 90degree bend. No amount of sucking with a shopvac will clean it.
I'd consider one of two things: one, think about switching to a vent pipe with a T that gives you more room, like the Excel. Or two, I'd raise the stove up a couple inches, something to give you the room to open the bottom of the T, so you can remove the ash cake that accumulates.
Lastly, I'd do the leaf blower trick to suck out any ash. Do a search on leaf blower trick on this forum or youtube and you'll see what I mean.
As for the failed ignition, I've never had one so I can't say whether yours is typical or not. It could be a side effect of your inefficient combustion leading to a lot of ash accumulation in the pot, so that the fresh pellets don't ignite. If that's the case, then you need to get your dealer to optimize combustion with a manometer. You can do it too, but I think your dealer should be given the chance to do his job, first.
