Harman Stove Company PF 100 - Manual (Page 23)

23 PF100
L OW
F UEL
65
60
75
80
70
Temperature Dial
Low Fuel Light
Wall Control
The wall control acts like a thermostat, however,
what is actually going on is a thermister in the wall con-
trol is sending temperature information back to the mi-
cro processor on the furnace. This information is used
to increase or decrease the size of the fire according to
the needs of the home.
Setting The Room Temperature
To set the room temperature, simply turn the tem-
perature dial to the desired setting. The control and the
furnace will then perform to achieve the set tempera-
ture.
Note: The minimum temperature you can set with
a full counter-clockwise knob position is 58 degrees.
The maximum temperature you can set with a full clock-
wise knob position is 90 degrees.
Wall Control calibration: The “Normal Setting” on
the Temp Dial of the Furnace Control (See Fig.44) cali-
brates the Wall Control temperature span.If the Temp
Dial is not pointing to the “Normal Setting”, the tem-
perature span could vary by 3 degrees up or down de-
pending on the Temp Dial knob setting.
Low Fuel Sensor
There is a low fuel sensor in the hopper that tells
the control that the fuel level in the hopper has dropped
below the sensor. When this happens, the Low Fuel light
on the Wall Control will start to blink.You then know
that it is time to fill the hopper with pellets.
Note: Testing the low fuel sensor can be done by
turning the FEED ADJUSTER knob to “Test”. The
POWER light will go off when the sensor is uncovered
and will light when the sensor is covered again.
Note: The LOW FUEL light on the Furnace Con-
trol will light at the same time. Only the LOW FUEL
light on the Furnace Control will remain lit for three min-
utes after the sensor is covered with pellets. See Note
below.
Note: The Low Fuel light indicates that there is
power going to the auxiliary leads in the circuit breaker
junction box. (120 VAC 60 Hz Max. 1 Amp.)
The auxiliary power leads would be used if an
optional bulk hopper and auger system were installed.
(see wiring diagram on page 36)
Low Fuel
Sensor
Fig. 43
Fig. 44
Fig. 45
Type of Fuel
Pelletized wood only. Note: The lower the ash
content of the pellets the less cleaning that will be needed
of the heat exchanger surfaces. The cleaner these surfaces
are kept, the more efficient the furnace will be.
Operation