Burner Flame Adjustments
SECTION 11
ADJUSTMENT
#SFD-36
R.6 February 2022
54
HUSSONG MFG. CO., INC.
KOZY HEAT FIREPLACES
11.2.2 Vent Restriction (after installation)
WARNING: To avoid property damage or personal injury, allow the
fireplace ample time to cool before making any adjustments.
WARNING: Improper vent installation may cause the burner flames
to lift or “ghost.” Perform a visual check on flame appearance after
restriction adjustment to ensure proper performance.
Vertical terminations may display an active, compact flame. To
achieve desirable flame appearance, the vent exit may be restricted
by the restrictor plate (included in components packet) and/
or by adjusting the built-in baffle door restrictor located in the
fireplace baffle.
This fireplace is shipped with the restrictor located in the fireplace
baffle set in the open position. Follow the tables below to adjust the
restrictor to desired flame appearance. Allow the fireplace to burn for
15 minutes before making any adjustments to the restrictor setting.
Table 11.4, Restricton Adjustment Guidelines
Flame Appearance
Draft Problem
Solution
Short, flickering
Excessive draft
Not enough restriction
Close baffle door
restrictor
Install restrictor plate
Lifting or ghosting*
Insufficient draft
Open baffle door
restrictor
Remove inner ring(s)
on restrictor plate, or
Remove restrictor
plate
*If flames continue to lift or ghost after opening the baffle door restrictor
or restrictor plate, and verifying correct vent installation, shut off the gas
supply and call a qualified service technician.
11.2.2.1 Baffle Door Restrictor Adjustment
NOTE: Verify the baffle door restrictor is set into ‘down’ position and
not flipped ‘up.’
1. Remove the safety barrier and glass frame assembly to access
the baffle door restrictor adjustment handle.
2. Loosen (2) thumb screws to adjust the setting to achieve desired
flame appearance.
3. Tighten screws after adjustment.
4. Reinstall the glass frame assembly and safety barrier.
11.2.2.2 Restrictor Plate Installation
1. Remove the safety barrier and the glass frame assembly.
2. To access the vent exit through the fireplace baffle, push baffle
door restrictor back.
3. Bend the tabs on the restrictor plate (included in components
packet) to approximately 80° angles. This will create tension
when the restrictor is inserted into the exhaust pipe.
4. Insert restrictor plate into the 5” (127mm) exhaust pipe with the
tabs pointing towards you.
5. Set the baffle door restrictor back into position.
6. Reinstall all components previously removed.
11.2.3 Restrictor Plate Modification
1. Remove the safety barrier and the glass frame assembly.
2. To access the vent exit through the fireplace baffle, push baffle
door restrictor back.
3. Remove the restrictor plate by pulling it down and out of the 5”
(127mm) exhaust pipe.
4. Make necessary modifications to achieve desired flame
appearance.
5. Insert restrictor plate into the 5” (127mm) exhaust pipe with the
tabs pointing towards you.
6. Set the baffle door restrictor back into position.
7. Reinstall all components previously removed.
THUMB SCREWS
VENT EXIT
BAFFLE DOOR RESTRICTOR
Restrictor Plate
Remove innermost circle to
create less restriction
Remove all inner rings for
the least restriction
Bend tabs to approx. 80˚ angles to create tension
to hold itself in place when installed
FIGURE 11.5
Vent Access and Restrictor Plate
FIGURE 11.4
Cross-section View of Baffle Door Restrictor
