Installation
900683-01F, 10/2018
Innovative Hearth Products
DRT3500 Series Direct-Vent Gas Fireplaces
43
16.
Optional: Install the Firebox Liners
1. See Page 53 for instructions on Traditional Only: Installing the Firebox Liners.
17.
Traditional Fireplaces: Install the Logs, Volcanic Stone, and Glowing Embers
1. See Pages 54–58 for instructions on Installing the logs, volcanic stone, and glowing embers.
18.
Install the Glass Door
1. See Pages 59–60 for instructions on Installing and removing the glass door.
19.
Adjust the Air Shutter to Ensure Proper Flame Appearance
WARNING
• Air shutter adjustment should only be performed by a qualified professional service technician.
• Ensure glass door is in place and sealed during adjustment.
CAUTION
• Soot will be produced if the air shutter is closed too much. Any damage due to sooting,
resulting from improperly setting the air shutter, is not covered under the warranty.
• The air shutter rod and nearby appliance surfaces are hot. Exercise caution to avoid injury
while adjusting flame appearance.
Flame Appearance and Sooting
The flame should be blue at the base, and yellow-orange in the body of the flame.
When the fireplace is first lit, the entire flame may be blue and will gradually turn yellow-orange during the first 15
minutes of operation. If the flame remains blue, or if the flame is orange with evidence of sooting (black tip), the air
shutter opening may need to be adjusted.
If the air shutter opening is closed too far, sooting may develop. Sooting is indicated by black puffs developing at the
tips of very long orange flames. Sooting results in black deposits forming on the logs, fireplace inside surfaces, and
on exterior surfaces adjacent to the vent termination.
Sooting is caused by incomplete combustion in the flames and lack of combustion air entering the air shutter
opening. To achieve a warm yellow-orange flame with an orange body that does not soot, the shutter opening must
be adjusted between these two extremes.
