Before I discuss the specifics of the system, please allow me to visit a basic prinicpal in any burning system.   If you want a little heat, make a small fire.  If you want a lot of heat, make a larger fire!    The LDJ Amaizeing Heat system simply does that by

• controlling the amount of fuel fed into the firepot , and in conjunction;
• controlling the amount of air (oxygen) being pumped into the firepot to support combustion.

Controlling the Fuel

Fuel enters the LDJ Amaizeing Heat furnace or boiler via a pair of augers.   When the augers and blower are running,  heat is being created at the rate desired.   If those augers are allowed to run at the max rate, fuel would be fed so as to allow the maximium 165,000 BTUs.   But in many cases this is not necessary or desired.    Lets discuss how we trim the fuel feed rate.

The augers run at a set speed (6 rpm for the boiler/furnace auger, 4 rpm for the feed auger in the copper tube).   By using a timer to cycle the auger on and off with the blower running, we can cut the amount of fuel fed into the unit.   

Let me simplify this:   If you want less BTUs, you need less fuel to do it.  By allowing the the timer to turn off the auger for a period of time, less fuel enters the fire.

On the other hand, if you want more BTUs, you need more fuel to do it.  By setting the timer so that the auger runs more than it is stopped, more fuel enters the fire.

This shows the timer used to control the fuel feed on the LDJ Amaizeing Heat Boilers and Furnaces.    Use the following table to understand the timer scale:

So, if a needle is set to 1.0, it makes that feature operate for 10 seconds.  

In the case of the LDJ Amaizeing Heat product, the green needle controls the time the auger is off, and the red needle controls the time the auger is on, or is sending fuel to the firepot.    Referencing the above picture, the red off timer is set to 1.5 or 15 seconds off, the green on timer is set to 2.0 or 20 seconds on.   This would be the timer setting for 100,000 BTUs.   The timer will continuously cycle between 20 seconds on and 15 seconds off anytime the blower is running.

If you want more BTUs, all we need to do is make the auger run longer in that cycle.   For instance, to go to 132,000 BTUs, the green off timer would still be 1.5 or 15 seconds off, but the red on time would be streched out to 3.0 or 30 seconds.   By making the on time 10 seconds longer, more fuel is entering the fire pot per cycle.

Here is what that timer would look like with a setting for 132,000 BTUs.

Conversely, if you want to trim the heat level to 80,000 BTUs, less fuel needs to enter the fire.  The length of time the auger is stopped needs to be increased or the amount of time the auger run decreases... or in this case both!   

Here are the settings for 80,000 BTUs.  The OFF time has remained at 1.5 or 15 seconds off, and the ON time has been cut to 1.0 or 10 seconds on.   In this case it is off more than it is on, thus a small amount of fuel enters the fire.

Now that we have covered how easy it is to adjust the fuel side of the equation, lets look at the air side of the equation.

Controlling the Air

With this or any other combustion process, the best burn will be when the air fuel mixture ratio is optimized.    Adjusting the air coming into the fire is necessary any time the Variable BTU timers are changed.

This is the combustion blower, which comes on every time the unit needs heat.   It blows a high volume of air into the fire pot, in doing so oxygen needed for combustion is supplied.   The amount of air is controlled by the size of the opening on the side you can see in the picture.  In this picture the opening is approximately 50% open and is the appoximate setting for 100,000 BTUs.

This shows the opening enlarged by sliding the damper open, and would be used if 132,000 BTUs is desired.

This final blower picture shows an opening of approximately 25%, and would be typical of an 80,000 BTU setting.

In each of these pictures, the bower opening was varied depending on the fuel input.   Less fuel equals a smaller opening and vice versa.   This is the primary adjustment you as the operator will make to your boiler or furnace.   The exact setting will vary a bit due to the type of fuel used and the moisture content of that fuel.   While there is a short learning curve to knowing how to adjust this blower, we at Trycornheat are here to assist in shortening that curve as much as possible.