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Greenfi re Pellet Stove and Insert Technical Manual
20
INSTALLATION
SLIDER / DAMPER SET-UP
THE SLIDER / DAMPER MUST BE SET AT TIME OF INSTALLATION,
IT IS USED TO REGULATE THE AIRFLOW THROUGH THE PELLET
STOVE.
A Qualifi ed Service Technician or Installer must set the Slider
Damper.
The slider damper is used to regulate the airfl ow through the pellet stove
and is located behind the left cab side (refer to Figure 39). The door must
be open for the cab side to be removed on all models. On freestanding
model loosen the two T-20 torx screws, one above and one below hinge,
swing open left panel to access. On insert model remove the two (2) T-20
torx screws on the front, one above and one below hinge, and the one
T-20 at the top of the cab side under the top front.
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 fi rebox will increase as the combustion exhaust blower
increases in speed (higher heat output setting).
If the fi re 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 fi rebox.
If, after long periods of burning, the fi re builds up and overfl ows 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 fi re more air.
Slider
Damper
Exhaust
Channel
Exhaust Blower
Note: Some parts
have been removed in order
to see components more clearly.
Figure 39: Slider / Damper
The easiest way to make sure that an effi cient fl ame is achieved is to
understand the characteristics of the fi re.
• A tall, lazy fl ame with dark orange tips requires more air – Open slider
(pull out) slightly.
• A short, brisk fl ame, like a blowtorch, has too much air – Close slider
(push in) slightly.
• If the fl ame is in the middle of these two characteristics with a bright yel-
low/orange, active fl ame with no black tips then the air is set for proper
operation.
Figure 40: Effi cient Flame.
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 fi re will be less
effi cient and has a higher possibility of the fi re building up and creating
clinkers (hard ash build-up).
Taking a reading of vacuum pressure inside the fi rebox with a magnehelic
gauge can be used to set the slider for best combustion. The slider damper
should be set only on a hot stove (operating for thirty (30) minutes or more)
by placing a Magnahelic Pressure Gauge in the fi rebox. The reading can
be taken from the ⅛” (3 mm) hole located in the front of the fi rebox under
the door (see Figure 41). The best settings are a reading of approxi-
mately 0.1" to 0.12" of water column on the high fi re setting. Some
fuels may require higher or lower settings.
Figure 41: Hole for Pressure test with Magnehelic Gauge.
INSTALLATION