Enviro 50-1574 - Manual (Page 21)

21
Installation
S
LIDER
/D
AMPER
S
ET
-U
P
:
This is used to regulate the airflow through the pellet stove. The slider damper should be set
by a trained technician using magnehelic.
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.
Air Intake Box
Exhaust Channel
Slider Damper
Exhaust Blower
Figure 26: Slider/Damper Plate in Unit.
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).
If the fire should happen to go out
and the heat output indicator has been
• 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 (see Figure 27).
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).
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 slider damper should be set only on a hot stove (operating
for thirty (30) minutes or more) by using a Magnahelic Pressure Gauge to measuring the pressure in the
firebox. The best settings are a reading of approximately 27.4 - 29.9 Pa (0.11 - 0.12 inches of
water column) on the high fire setting. Some fuels may require higher or lower settings. The
reading can be taken from the 3 mm (1⁄8”) hole located on the front of the unit below the ash shelf.
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.
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.
Figure 27: Efficient Flame.