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22 USSC
CONTROL BOARD FUNCTIONS
START-UP SEQUENCE OF EVENTS
Once the control panel is turned on, a timer begins that will start, stop and continue operation of the Multi-fuel
Heater as a preset temperature is achieved.
COMPONENT OPERATION START OPERATION END
Draft Fan Starts Immediately Will continue until shutdown. Shutdown will occur
when the operating temperature is below approx. 90
degrees.
Agitator Begins to turn once the heater reaches op-
erating temperature
Will continue intermediately, as determined by the
“HEAT SETTING”, until shutdown.
Auger In Pellet mode: Auger turns immediately.
In Corn mode: Three minutes after starting,
the auger will begin to turn
The auger will continue at the feed rate specied by
the “HEAT SETTING”.
NOTE: Safety switches, HI limit and vacuum sensor,
must be activated to continue proper operation.
Room Fan Begins to run when heater reaches operat-
ing temperature
Will continue to operate until the heater cools down to
below approx. 90 degrees. This may take several hours.
Automatic Shutdown If after 15 minutes, the heater has not
reached the preset operating temperature,
the unit will begin to automatically shut
down.
Should the timer expire before the preset operating
temperature is achieved, simply reset the heater by
pressing the “ON” button.
Normal Operation If after 15 minutes the preset operating tem-
perature of approx. 110 degrees is achieved,
normal operation will continue.
Operation will continue until either the heater’s control
is to the “OFF” position, or the operating temperature
falls below approx. 90 degrees. At such time the heater
will default to the “Automatic Shut Down”.
Igniter Starts immediately Will continue operation for a preset time, then shut-off
SHUTDOWN SEQUENCE OF EVENTS
Once the Heater has reached the normal operating temperature and switched to the “OFF” position, the unit will
initiate a slow down, reducing the fuel rate until the heater’s “LOW LIMIT SAFETY” sensor tells the control board it
is safe to shutdown.
COMPONENT SHUTDOWN OPERATION END
Draft Fan Unchanged operation until preset “OFF”
temperature is achieved.
Continues until the operating temperature falls below
approx. 90 degrees. May take several hours.
Agitator Rotates continuously until preset “OFF” tem-
perature is achieved.
Continues until the operating temperature falls below
approx. 90 degrees.
Auger Slows down to a reduced fuel setting until
preset “OFF” temperature is achieved.
The auger will continue at the reduced feed rates
until the operating temperature falls below approx.
90 degrees.
NOTE: Safety switches, HI limit and vacuum sensor,
must be activated to continue proper operation.
Room Fan Unchanged operation until preset “OFF”
temperature is achieved.
Will continue to operate until the heater cools down to
below approx. 90 degrees. This may take several hours.
Automatic Shutdown If the heater’s “HI LIMIT” sensor snaps open,
this will cause an automatic shutdown. An
error code will be displayed (Err1). NOTE:
“HI LIMIT” errors are usually the result of
operating at the highest heat setting for long
periods of time, room fan failure or loose
wire connection.
It is rare that the HI LIMIT temperature is reached.
However, should this error occur, let the heater cool
down for an hour then restart.
CAUTION: When performing any internal electrical maintenance
• Moving parts inside of the cabinet may cause injury. Do not operate unit with panels removed or open.
• HOT parts. Do not operate the unit with panel open.
• Risk of electric shock. Disconnect power before servicing unit.
• In the event of component failure, replace with the original factory equipment.