Harman Super-Magnum Owner's Manual page 21

Super-Magnum Coal Stoker Stove
a. Feed Rate Adjustment
The Circuit board runs on a one minute timer cycle. Each
minute, the board is thinking ahead to what it needs to do
for the next minute to maintain or achieve the demanded
temperature. What you are setting on the feed adjuster dial
is the maximum amount of feed time, per minute, that you'll
allow. The circuit board will make its own determination of
how long to run the feeder, UP TO the maximum as set
on the dial. For instance, a number 4 setting on the feed
adjuster will allow a maximum of 40 seconds per minute of
feed. If the room temperature is satisfied, with only feeding
20 seconds, then that is all the circuit board will run the
feeder. In most tested scenarios, the number 4 setting is
adequate, however, fuel quality may dictate a higher or
lower setting. If you see un-burned or burning coal being
pushed off of the grate during a high demand period, the
feed rate is set too high. Ideally, you'll want to see about
an inch of ashes in front of the burning coal during a peak
demand period. Setting the feed rate too low may not allow
the demand temperature to be met. Keeping the setting at
#4 or above will work with most batches of coal. Allow a
minimum of one hour between adjustments.
Note: Since the circuit board is feeding as needed,
only adjust the feed rate while maximum demand is
occurring. (Stove Temp Mode, with a temp dial setting
of #7 will create maximum demand.)
b. Mode Selection
Room-Temp mode is the ideal mode of operation if you
wish to maintain a comfortable temperature in the room.
As the outdoor temperature fluctuates, the Super Magnum
will adjust the feed rate to maintain the desired temperature
setting in the room. For best results, be sure the room sensor
is located outside of any drafty areas and not positioned on
the floor or near an exterior wall.
Stove-Temp mode is more of a manual method of operation.
The stove will run at a constant heat output, regardless of
outside air temperature. Note that on the coldest days, your
indoor heated space will be cooler than on the warmer
days. The only real benefit to this mode of operation is that
you'll be able to know exactly how long a hopper full of coal
will last, because the consumption is going to stay relatively
the same.
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c. Temperature Dial
The temperature dial is a dual purpose dial. In Room-Temp
mode, you select the room temperature you want the stove
to maintain at the room sensor probe. This is marked in
fahrenheit scale from 50 to 90 degrees. In Stove-Temp
mode, you select a temperature setting based on the #1 - 7
with 1 being a minimum burn and 7 being a maximum burn
rate.
d. Blower Speed Adjustment
The mode selector is also marked with a L to H scale, in each
mode. This is a variable speed control for the distribution
blower. L is the low setting, and H is the high setting. It
is important to note that the blower will not come on until
the ESP reaches a high enough temperature to ensure that
cold air is not being blown out into the room. Also, the speed
of the blower, when set on lower speeds, will automatically
increase as the temperature of the stove increases.
Keep Hopper Lid, Ash Pan, and Fire viewing doors
closed while in operation. Maintain all door seals and
gaskets in good condition. Replace gaskets when
necessary using parts obtianed through your Harman
dealer.
Burning with one or more of the unit doors open will
lead to overfiring which could damage the appliance,
chimney, or connector, or could cause a house fire.
Do Not Burn Wet Coal! 21