Burner Flame Adjustments
SECTION 11
ADJUSTMENT
#SP-41-L
R.6 February 2022
45
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
restrictor plate adjustment to ensure proper performance.
Vertical terminations may display an active, compact flame. If this
appearance is not desirable, a restrictor plate may need to be installed
or modified after vent termination installation. Access to the vent exit
for restriction can be reached through the fireplace baffle. Allow the
fireplace to burn for 15 minutes before making any adjustments.
Table 11.5, Restrictor Plate Adjustment Guidelines
Flame Appearance
Draft Problem
Solution
Short, flickering
Excessive draft
Not enough restriction
Add restrictor plate
Lifting or ghosting*
Insufficient draft
Remove inner ring(s)
on restrictor plate, or
Remove restrictor
plate
*If flames continue to lift or ghost after opening the restrictor plate
and verifying correct vent installation, shut off the gas supply and call a
qualified service technician.
11.2.2.1 Restrictor Plate Installation
1. Open the control compartment access panel
2. Remove the safety barrier and glass frame assembly.
3. Remove (3) screws at the firebox ceiling securing the baffle. Lift
the baffle out of slots on the firebox back wall.
4. Bend the tabs on the restrictor plate (included in components
packet) to approximately 80° angles. This will create tension
when the restrictor plate is inserted into the exhaust pipe.
5. Insert restrictor plate into the 4” (102mm) exhaust pipe with the
tabs pointing towards you.
6. Reinstall baffle by inserting the tabs on the baffle into the slots
on the firebox back wall. Secure the baffle to the firebox ceiling
with (3) screws.
7. Reinstall all other components previously removed.
8. Set control compartment back into position.
11.2.2.2 Restrictor Plate Modification
1. Open the control compartment access panel.
2. Remove the safety barrier and glass frame assembly.
3. Remove (3) screws at the firebox ceiling securing the baffle. Lift
the baffle out of slots on the firebox back wall.
4. Remove the restrictor plate by pulling it down and out of the 4”
(102mm) exhaust pipe. Make necessary modifications to achieve
desired flame appearance.
5. Insert restrictor plate into the 4” (102mm) exhaust pipe with the
tabs pointing towards you.
6. Reinstall baffle by inserting the tabs on the baffle into the slots
on the firebox back wall. Secure the baffle to the firebox ceiling
with (3) screws.
7. Reinstall all other components previously removed.
8. Set control compartment back into position.
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
(3) screws securing baffle
slots on firebox back wall
FIGURE 11.4
Restrictor Installation and Modification
