#SLA-60 R.8 March 2022
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
ADJUSTMENT
45
11.2.2 Vent Restriction
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 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).
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 11.5, Restrictor Adjustment for Flame Appearance
Flame Appearance
Draft Problem
Vent Restriction
Short, flickering
Excessive draft
Not enough
restriction
Close baffle restrictor
Install restrictor plate
Lifting or ghosting*
Insufficient draft
Too much
restriction
Open baffle restrictor
Remove inner ring(s) on
restrictor plate, or remove
restrictor plate
*If flames continue to lift or ghost after opening the baffle restrictor or
installing and verifying correct vent installation, shut off the gas supply
and call a qualified service technician.
11.2.2.1 Restrictor Plate Installation
1. Remove the safety barrier and the glass frame assembly.
2. Remove (2) screws securing termination access panel. Release
panel tabs from slots in baffle.
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 into the 5 in (127 mm) exhaust pipe with the tabs
pointing towards you.
5. Reinstall termination access panel by inserting tabs in panel into
slots in baffle. Secure with (2) screws previously removed.
6. Reinstall all components previously removed.
11.2.2.2 Restrictor Plate Modification
1. Remove the safety barrier and the glass frame assembly.
2. Remove (2) screws securing termination access panel. Release
panel tabs from slots in baffle.
3. Remove the restrictor by pulling it down and out of the 5 in (127
mm) exhaust pipe.
4. Make necessary modifications to achieve desired flame
appearance.
5. Insert restrictor into the 5 in (127 mm) exhaust pipe with the
tabs pointing towards you.Reinstall termination access panel by
inserting tabs in panel into slots in baffle. Secure with (2) screws
previously removed.
6. Reinstall all components previously removed.
Figure 11.4, Restrictor Installation and Modification
