15
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
A B
C D
* Other approved chimney brand is Simpson Dura-Vent DV-GS.
Figure 24
Flue Restrictors
The flue restrictor settings shown in Figures 25 and 26 are for typical
installations and may need to be adjusted from standard to take into
account other variables in the installation to achieve proper combustion.
See Flue Restrictor Guidelines on this page to assist you in making a
proper flue restrictor adjustment.
This stove requires a balanced flue to ensure proper combustion. As such,
flue restrictors may need to be installed depending on the vent configura-
tion of your stove. The drawings on the next page show all the allowable
pipe configurations for the Epic™ gas stove. To properly install the flue
restrictors, find your pipe configuration in the drawings on the next page
and note which restrictor setting is recommended. The flue restrictors are
shipped in the firebox of your stove. Install the flue restrictors using the
four allen head screws according to the diagram below. Install the flue
restrictor screws in their original holes in the top of the firebox. Restrictor
positions are based on tests run in a laboratory.
Flue Restrictor Adjustment Guidelines
After the flue restrictors have been changed to the standard flue restrictor
settings as shown in Figures 25 and 26, the burner flame appearance
should be evaluated to determine if the A, B, C or D flue restrictor standard
settings were the correct adjustment for variables in your installation.
Light the appliance and allow it to burn for 20 minutes on the high setting.
See Flame Color and Behavior on Pages 21 and 22 to determine if you
have a proper burner flame appearance. If the proper flame appearance
cannot be achieved, the flue restrictor may need to be changed to a dif-
ferent position (A,B,C or D). See the following guidelines to determine if
you need to readjust the flue restrictors.
Before proceeding, confirm the manifold and inlet gas pressure is correct,
primary air shutter is properly adjusted, venting system connections are
secure and not blocked and if you are at a high elevation, ensure unit
has been properly derated:
Symptoms - Lack of Combustion Air
If the symptoms listed below are present, you may need to adjust the
flue restrictor to a more open position.
• Flame appears yellow
• Floating Flames (lazy, ill defined, quiet, may roll)
• Sooting
• Pilot becomes yellow and appliance shuts down
Symptoms - Excessive Combustion Air
If the symptoms listed below are present, you may need to adjust the
flue restrictor to a more closed position.
• Low Flame
• Pilot pulls and appliance shuts down
• Pilot flame ghosts
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