Harman® • PF-120 Owner’s Manual_R3 • 2014 -___ • 10/14
10
3-90-08120c
I. 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 Control will light
at the same time. Only the LOW FUEL light on the Furnace
Control will remain lit for three minutes 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 could be
used if a bulk hopper and auger system were installed. (see
wiring diagram on page 36)
Type of Fuel
Pelletized wood only.
Note:
The lower the ash content of the pellets means less
heat exchanger surface cleaning that will be needed. The
cleaner these surfaces are kept, the more efficient the
furnace will be.
DO NOT BURN GARBAGE, GASOLINE, NAPTHA,
ENGINE OIL OR OTHER INAPPROPRIATE MATERIALS
CAUTION
!
G. Before Your First Fire
1. Make sure your appliance has been properly installed and
that all safety requirements have been met. Pay particular
attention to the fire protection and venting instructions.
2. Double check that the ash pan and firebox are empty!
3. Close the front door.
H. wall Control
The wall control acts like a thermostat, a thermister in the
wall control is sending temperature information back to the
micro processor on the furnace. This information is used to
determine the need to increase or decrease the size of the
fire according to the temperature demand.
Setting The Room Temperature
To set the room temperature, simply turn the temperature
dial to the desired setting. The control and the furnace will
then perform to achieve the set temperature.
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 clockwise knob position
is 90 degrees.
Wall Control calibration: The “Normal Setting” on the Temp
Dial of the Furnace Control (See Fig.44) calibrates the Wall
Control temperature span. If the Temp Dial is not pointing to
the “Normal Setting”, the temperature span could vary by 3
degrees up or down depending on the Temp Dial knob setting.
