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If the fire should happen to go out and the heat output indicator has been set on the lowest setting, the
Slider Damper should be pushed in slightly, decreasing the air in the firebox.
If, after long periods of burning, the fire builds up and overflows the burn pot or there is a build up of
clinkers, this would be a sign that the pellet quality is poor, this requires more primary air, the slider
damper must be pulled out to compensate. Pulling the slider damper out gives the fire more air.
Installation
SLIDER/DAMPER SET-UP:
This is used to regulate the airflow through the pellet stove. The slider damper should be set by a trained
technician using magnehelic.
Air Intake
Box
Exhaust
Channel
Slider
Damper
Exhaust
Blower
Figure 25: Slider/Damper Plate in Unit.
The slider damper is located behind the
left side panel. To open the left side
panel, undo the one screw located in
the upper front corner of the cabinet
side between the louvers. Also loosen
three screws down the back of the side
panel.
The combustion exhaust blower is a
variable speed blower controlled by
the heat output button. This blower will
decrease the vacuum pressure inside
the stove and as the heat output button
is turned down. The vacuum pressure
inside the firebox will increase as the
combustion exhaust blower increases in
speed (higher heat output setting).
Figure 26: Efficient Flame.
IMPORTANT: Taking a reading of vacuum pressure inside the firebox with a magnehelic gauge should
be used to set the slider for best combustion. The best settings are a reading of approximately
0.11 0.12 inches of water column (27.4 - 29.9 Pa) on the high fire setting. Some fuels may
require higher or lower settings. The reading can be taken from the ” (3 mm) hole located on the
front of the unit below the ash shelf.
The easiest way to make sure that an efficient flame is achieved is
to understand the characteristics of the fire.
• A tall, lazy flame with dark orange tips requires more air – Open
slider (pull out) slightly.
• A short, brisk flame, like a blowtorch, has too much air – Close
slider (push in) slightly.
• If the flame is in the middle of these two characteristics with a
bright yellow/orange, active flame with no black tips then the
air is set for proper operation.
SPECIAL NOTES:
Pellet quality is a major factor in how the Pellet stove will operate. If
the pellets have a high moisture content or ash content the fire will
be less efficient and has a higher possibility of the fire building up
and creating clinkers (hard ash build-up).