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Startup
When the circuit board is energized (unit plugged in) there is a 15 second purging of the auger tube to
allow fuel to enter the firepot. To initiate the Startup, turn the heat setting knob to the number 3 setting.
If the unit is started on the 1 or 2 settings the firebox temperature may not rise fast enough for the low
limit censor to engage. When the heat setting knob is turned on, the draft blower starts but the auger feed
does not start feeding fuel until after 3 minutes.
The fuel stirrer can be turned on at this time and run for a couple of turns to stir the fuel. After the fuel is
lit, the fuel stirrer can be left on the number 1 setting. Corn may require a higher setting if the moisture
content is high or if the corn has a high starch content. Wood pellets may require a higher setting if the
ash content is high or if you are running the unit on the high setting.
NOTE:
Make sure that the wall thermostat is turned up so that the unit will start on the number 3 setting.
If the fire is not hot enough to engage the low limit sensor, (within 20 minutes) the circuit board will cycle
through the shut down mode and the unit will shut down. The green indicator light will blink rapidly to
show that the unit is not operating properly. To restart the system, simply turn the heat-setting knob to the
off position and turn back on to the number 3 setting.
Once the unit is operating at the proper temperature (usually 10-15 minutes), select the heat setting that
you want, adjust the manual draft adjustment lever so that the fuel is app. ½ inch thick in the bottom of
the firepot.
(there should be a nice bed of red coals in the bottom of the firepot)
The number 3 heat setting is best for corn and the number 4 heat setting is best for wood pellets for a high
fire burn. The high heat setting should only be used if the home is over 2500 square feet or the weather is
extremely cold. The high heat setting is intended for use with wood pellets and the highest heat setting
for corn would be the number 4 setting.
The unit is not designed to be operated for long periods of time on the highest setting. Optimum
efficiency is achieved by using lower settings. It is also recommended that the unit not be run for
extended periods of time on the number 1 setting. The draft blower and venting will fill up with fly ash
after a long period of time. Once a day turn the manual draft knob open all the way and turn the unit up
on high. Run it this way for a few minutes to clear the venting and draft blower. It is good to run the unit
on one of the higher settings at least once a week to clear the system and eliminate the buildup of fly ash.
Shutdown
To shut the unit down simply turn the heat setting knob to the off position and the system will enter the
shut down mode.
The fuel stirrer, room fan and exhaust blower
will continue to operate until the low
limit safety censor tells it that the fire is out and the firepot has gone through its cleaning cycle. After this
time the fuel stirrer will shut off. When this happens the fuel auger will go into the purging cycle and
auger a small amount of fuel out of the auger into the firepot. Then the entire system shuts down.
CIRCUIT BOARD FUNCTIONS
Before starting up the Magnum 7500 Corn/Wood Pellet unit again, it is important to remember to shut
off the fuel stirrer so that the fire can be started properly. It will also ensure that the fuel stirrer will
not start with someone having his or her hand in the firepot area.
