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Notice (Damper Clamp Installation)
When installing your gas appliance as a vented installation
the damper clamp must be used.
When installing your gas appliance as a vent-free installation
the damper clamp can be used to eliminate the potential for
odors when burning the logs for the first time.
Installing Damper Clamp (Figure 9)
Remove all ashes or other debris from the fireplace. If the
fireplace is equipped with an ash dump be sure to seal the
door with furnace cement or high temperature silicone. Be
sure to check the damper for proper operation and verify that
the flue passageway is open.
Place the clamp over the lip of the damper and tighten the
hold down bolt until the clamp is securely attached to the
damper. This will prevent the damper from accidentally
closing.
The gas appliance may be installed as a vented decorative
gas appliance in compliance with ANSI Z21.60 and National
Fuel Gas Code. When the gas appliance is operated with
the damper open, non-combustible material and minimum
mantel requirements do not apply.
Figure 9
INSTALLING AS A VENTED APPLIANCE
DAMPER
DAMPER
TYPICAL FIREPLACE
DAMPER CLAMP
FOR MASONRY BUILT FIREPLACES
FREE OPENING AREA OF CHIMNEY DAMPER FOR VENTING
COMBUSTION PRODUCTS FROM DECORATIVE APPLIANCES
FOR INSTALLATION IN SOLID FUEL BURNING FIREPLACES
*
Height is from hearth to top of chimney and the minimum height
is 6 feet.
** Chart shows minimum opening (sq. in.) for given height and
input rate.
•
Turn off gas supply to fireplace or firebox.
•
Have the fireplace floor and chimney professionally cleaned to
remove ashes, soot, creosote or other obstructions.
Have this cleaning performed annually after installation.
•
Seal any fresh air vents or ash clean-out doors located on floor
or wall of fireplace. If not, drafting may cause pilot outage or
sooting. Use a heat-resistant sealant. Do not seal chimney flue
damper.
Install and operate the appliance as directed in this manual.
FOR FACTORY BUILT FIREPLACES
FREE OPENING AREA OF CHIMNEY DAMPER FOR VENTING
COMBUSTION PRODUCTS FROM DECORATIVE APPLIANCES
FOR INSTALLATION IN SOLID FUEL BURNING FIREPLACES
* Height is from hearth to top of chimney and the minimum
height is 10 feet.
** Chart shows minimum opening (sq. in.) for given height and
input rate.
Appliance Input Rate (BTU/hr)
20
30
40
Chimney
Height* (ft)
Minimum Opening** (sq. in.)
10
11.3
16.6
22.1
15
8.6
12.6
17.3
20
7.5
10.8
14.5
25
6.6
9.6
12.6
30
6.2
9.1
11.3
35
5.7
8.0
10.8
40
5.3
7.5
10.2
Appliance Input Rate (BTU/hr)
20
30
40
Chimney
Height* (ft)
Minimum Opening** (sq. in.)
6
17.6
25.7
33.8
8
16.5
23.7
31.2
10
15.1
21.7
28.7
15
14.1
19.9
26.1
20
12.9
18.5
23.7
30
12.2
16.9
21.6
FIREPLACE PREPARATION
