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USSC 17
Exhaust Blower
Agitator
Auger
Room Fan
Automatic Shutdown
Normal Operation
COMPONENT OPERATION START OPERATION END
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 Hearth
Focus as a preset temperature is achieved.
Starts Immediately
Three minutes after starting the agitator will
begin to turn
Three minutes after starting the auger will
begin to turn
Begins when 110 degrees is reached.
If after 15 minutes, the heater has not reached
the preset operating temperature, the unit will
begin to automatically shut down.
If after 15 minutes the preset operating tem-
perature of 110 degrees is achieved, normal
operation will continue.
Will continue until shutdown. Shutdown will
occur when the operating temperature is
below 90 degrees.
Will continue intermediately, has determined
by the “HEAT SETTING”, until shutdown
The auger will continue at the feed rate
specified by the “HEAT SETTING”.
NOTE: Safety switches, HI limit and vacuum
sensor, must be activated to continue proper
operation.
Will continue to operate until the heater cools
down to below 90 degrees. This may take
several minutes up to an hour.
Should the timer expire before the preset
operating temperature is achieved, simply
reset the stove by pressing the “ON” buttton.
Operation will continue until either the
heater’s control is to the “OFF” position, or
the operating temperature falls below 90
degrees. At such time the heater will default
to the “Automatic Shut Down”.
Exhaust Blower
Agitator
Auger
Room Fan
Automatic Shutdown
COMPONENT SHUTDOWN OPERATION END
Unchanged operation until preset “OFF” tem-
perature is achieved.
Continues at a lower sequence
Slows down to a “HALF SETTING” for 10
minutes and then to a “QUARTER SETTING”
for the duration of the shutdown.
Unchanged operation until preset “OFF” tem-
perature is achieved.
If the heater’s “HI LIMIT” sensor snaps open,
this will cause an automatic shutdown. This
will be evident by the red light above “B” on
the control board flashing. 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 connec-
tion.
Continues until the operating temperature falls
below 90 degrees. May take several minutes
up to an hour.
Continues until the operating temperature falls
below 90 degrees.
The auger will continue at the lower feed
rates until the operating temperature falls
below 90 degrees.
NOTE: Safety switches, HI limit and vacuum
sensor, must be activated to continue
proper operation.
Will continue to operate until the heater cools
down to below 90 degrees. This may take
several minutes up to an hour.
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.
SHUTDOWN SEQUENCE OF EVENTS
Once the Hearth Focus has reached the normal operating temperature and switched to the “OFF” position, the unit
will continue to operate on a much lower setting for 10 minutes. (Approximately half of the “1” setting). After 10
minutes the auger will slow down further and continue at this feed rate until the heater’s “LOW LIMIT SAFTEY”
sensor tells the control board it is safe to shutdown.