CIRCUIT BOARD FUNCTIONS
START-UP SEQUENCE OF EVENTS
Once the control panel is turned to on, a timer begins that will start, stop and continue operation of the American Harvest as a preset temperature is achieved.
COMPONENT | OPERATION START | OPERATION END |
Exhaust Blower | Starts Immediately | Will continue until shutdown. Shutdown |
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| will occur when the operating tempera- |
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| ture is below 90 degrees. |
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Agitator | Three minutes after starting the agita- | Will continue intermittingly, has deter- |
| tor will begin to turn | mined by the “HEAT SETTING”, until |
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| shutdown |
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Auger | Three minutes after starting the auger | The auger will continue at the feed rate |
| will begin to turn | specified by the “HEAT SETTING”. |
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| NOTE: Safety switches, HI limit and |
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| vacuum sensor, must be activated to |
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| continue proper operation. |
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Room Fan | Begins when 110 degrees is reached. | Will continue to operate until the |
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| AMERICAN HARVEST cools down to |
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| below 90 degrees. This may take sev- |
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| eral minutes up to an hour. |
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Automatic Shutdown | If after 15 minutes, the American | Should the timer expire before the |
| Harvest has not reached the preset | preset operating temperature is |
| operating temperature, the unit will | achieved, simply reset the stove by |
| begin to automatically shut down. | pressing the “ON” buttton. |
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Normal Operation | If after 15 minutes the preset operat- | Operation will continue until either the |
| ing temperature of 110 degrees is | AMERICAN HARVEST control is to |
| achieved, normal operation will con- | the “OFF” position, or the operating |
| tinue. | temperature falls below 90 degrees. At |
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| such time the AMERICAN HARVEST |
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| will default to the “Automatic Shut |
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| Down”. |
Adjusting the Air/Fuel Mixture
The two adjustments necessary for proper air/fuel mixture are the combustion air/blower setting and the auger run time setting. These two adjustments are the basis for allowing this model the ability to burn many types of fuel in many different installations.
The auger run time adjustment is made by pressing the “A” button and adjusting the nine variables up or down as necessary. This allows the user ultimate control of the amount of fuel delivered. Increasing the number displayed, feeds more fuel and lowering the number deceases the fuel. When adjustments are needed for the Combustion air/blower, press “B” and adjust up or down as required. The adjustments made here are saved automatically and applied to all nine heat ranges. Even though all nine heat ranges are affected, the lower ranges are adjusted the most. These adjustments allow, “tweaking” your unit for maximum efficiency.
Note: On some models the “A” and “B” buttons are deactivated from the factory.
If activation of “A” and “B” is necessary
•Step 1 turn unit “ON”.
•Step 2 Press and hold the Blower “UP” arrow and the Heat range “DOWN” arrow at the same time for 5 seconds. In most cases, you will see the numbers displayed in the heat range window and blower window blink. Then release the buttons and press “A” or “B” buttons to check activation. When activated, pressing either button will display a light above that letter and display a single digit in the blower speed window. The heat range window will be blank. If not activated, repeat the Step 1.
16 | USSC |