Safety Features - Harman PC45 Installation & Operating Manual

Fig. 38
Fig. 39
The low draft sensor which is a vacuum differential switch, monitors the negative pressure (draft) in the firebox through a
port on the rear of the feeder. Poor draft can be caused by blockage in the exhaust, excessive build-up on the combustion
blower fan blades, a failed combustion blower, or a door or other opening to the firebox not sealed properly.
The circuit board is monitoring the position of this switch. If this switch were to open, power to the igniter and the feed
motor are interrupted. The indicator lights for these components may be illuminated even though power is not flowing to the
components. Be sure all doors, including the hopper lid, are securely closed when operating the appliance.
3-90-02686R29_05/14
burn Pot maintenance
Corn or Pellet Burnpot Setup
Pellet "only" Burnpot Setup)

Safety Features

burn Pot Cleaning and maintenance
1. Be sure the stove power is turned off.
2. Lift up and remove the front plate lock and front plate. Set
aside the front plate.
3. Remove the auger extension by pulling toward you, then
set aside (corn burnpot only)
4. Remove burnpot grate and set aside.
5. Clean all fines and debris that has accumulated.
6. Install the "cleaned" burnpot grate making sure the 2 holes
line up with the 2 tabs in the burnpot housing.
7. Now install the spare "clean" auger extension into the
auger shaft. Make sure there isn't any corn or debris in
the shaft opening. This will prevent the auger extension
from being fully inserted into the shaft.
8. Align the auger extension through the hole in the "clean"
front plate and place front plate against the burnpot grate
and housing.
9. Install the front plate lock.
NOTE: After cleaning of these parts, inspect for excessive
wear and replace as needed.
Cleaning of burnpot Parts
Cleaning can be performed in 2 basic ways:
1. Because the corn slag buildup will absorb moisture from the
air when cool, the parts can just be left exposed for several
days and the slag buildup will crumble off of the parts.
2. To accelerate this process, the parts can be soaked in
water for approximately 30 minutes (depending on the
amount of buildup, they could be cleaned in less time).
NOTE: Cleaning of these parts is not necessary until you
see that there is a noticeable decrease in the quality of the
flame in the burnpot. Example: Unburned fuel being pushed
over the burnpot.
PC 45 Corn/Pellet Stove 22