Optimal Coal Oven Settings: Guide for 25KW Furnace, Feeding & Pause Tips, and Chimney Heat Issues

I have a problem with setting the stove for coal, I read various forums and I don't know how to set the driver myself.
25KW furnace anyone can give their settings (feeding, pause during work)
I am aware that if someone gives me their settings, it will not solve my problem, but I will have a reference point.
Generally, the stove doesn't burn coal for me, the chimney is hot
Please help

I have an oven without a feeder but I suspect that the principle is similar. I set it up by trial and error until I thought it was ok for me.
Pauze I have set for 8 minutes blow-in for 60 seconds.
Blower fan from 20% to 40%
Stopping the windmill as the furnace temperature drops to 33 degrees (always burns me)
I also noticed that a lot depends on coal (I took it once from another supplier and I didn't burn it)

kriso221 wrote:

Windmill from 20% to 40%
Stopping the windmill as the furnace temperature drops to 33 degrees (always burns me)

The windmills are standing in the fields.

Sorry, I meant: a blower fan.

Well, the fact is that I have actually given little information.
Namely
By settings
Passing 13 seconds
Pause 58 seconds
Fan 70 percent flap on the fan half open it can be said that it burns out but the chimney is hot so I tried to reduce the speed then ejects coal and slakes

Install the chimney draft regulator. In addition, you should have a non-return flap mounted on the fan, it opens itself when blowing. Your settings are not much different from the examples.

And what is this cauldron? How many meters do you heat? What driver? What peas?

meters for heating 150m2
when it comes to fuel, I only know calorific value 27
TECHNIX ARGOS PID controller
RMS fan - 120 AL MAX
25kw boiler with a screw feeder

What exactly is the boiler?

What is the demand according to: http://cieplowlasciwie.pl/

Insert the photo of the ash drawer and burner.

20181104_1..829.jpg Download (1.11 MB)

The fact that the chimney is hot is better than tar is supposed to flow in it as a by-product of low exhaust gas temperature.

On the right side of the crown and on the front like a cauliflower. Is the blow good there? Is everything tight? When was the boiler and chimney cleaned?

How much was the demand for heat according to the page I gave?

The following calculations assume that the average daily temperature of 23.0 ° C will be kept at home throughout the winter.

15.5kW - maximum heating power
That much will be needed on the "coldest" day, with a daily average of -20 ° C.
This means that for each hour of the day in the building you need to "pump" an average of at least 15.5kWh so that the temperature does not drop inside.

7.3kW - average heating power
That much will be needed on an average winter day, with a daily average of 2.7 ° C.


154W / m2 power demand indicator
This value can be found in the table of approximate boiler power selection from its manufacturer.

36 327kWh = 131GJ total annual energy consumption for heating
So much net heat your home needs for the entire heating season. Depending on what and with what efficiency you will heat, the amount of gross heat you need to buy in fuel will be correspondingly higher.

360kWh / m2 * year energy consumption indicator


the boiler and chimney are cleaned on a regular basis, rather all airtight smoke is not released outside
when it comes to blowing, I think I don't know how to check it

Now you see how much you have an oversized boiler?

What tank do you have and at the current temperature is it enough for you? Or otherwise - 25 kg of peas is enough for .... days?

And what happens if you switch to automatic mode and the controller will choose the parameters based on the boiler temperature setpoint?

Buddy 70% turnover is definitely too much in addition with such an oversized boiler - you are packing cash into clouds. I suspect you don't have an exhaust gas temperature sensor?
When reducing the blower speed it is normal that if you do not simultaneously reduce the carburizing of the burner (reducing the feeding time or increasing the pause) then you will have a low
I suggest you reduce the blowing power to 40% and feed time to 8 seconds. Watch for a few hours. If it continues to flip but keep cutting time shorter but slowly (by 1 sec and watch). If the mound collapses, the opposite is true - extend the feeding time.

Not wanting to create a new topic, I would like to ask you about one thing. Is it possible to smoke eco-pea coal in a regular old Ogniwo 17KW furnace? Currently, prices of pea coal in bags are at a really low level, I would like to be more ecological and smoke from above with pea coal and dry beech.