Desa 103426-01 - Manual (Page 8)

8 103426
UNVENTED NATURAL GAS LOG HEATER
INSTALLING DAMPER
CLAMP ACCESSORY FOR
VENTED OPERATION
Note: When used as a vented heater, appli-
ance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of non combustible material.
If your heater is a manually controlled model,
you may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.
1. The fireplace does not meet the clear-
ance to combustibles requirements for
vent-free operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
Figure 11 - Attaching Damper Clamp
Damper
Damper
Clamp
Damper
Clamp
Damper
Damper
Manufactured Fireplace
Masonry Fireplace
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
Area of Various Standard Round Flues
Diameter (ins.) Area (sq. ins.)
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
14"
Min.
Combustible
Material
Non-Combustible
Material
Figure 9 - Minimum Fireplace Clearances
If Installed at Floor Level
B. If combustible materials are less than
14" to the fireplace, you must install
appliance at least 5" above the combus-
tible flooring (see Figure 10).
Hearth
5"
Min.
Combustible
Material
Figure 10 - Minimum Fireplace Clearances
Above Combustible Flooring
Minimum Non-
Combustible
Material
8"
Min. 12" 15" 18"
All minimum
distances are
in inches
Log Sets
18", 24",
& 30" Models 20"
2 1 /2 "
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050, GA6052)
Top of Fireplace
Opening
Underside of
Mantel Shelf
Floor Clearances
A. If installing appliance on the floor level,
you must maintain the minimum dis-
tance of 14" to combustibles (see Fig-
ure 9).
If your installation does not meet the above
minimum clearances, you must:
• operate the logs only with the flue
damper open, OR
• raise the mantel to an acceptable height,
OR
• remove the mantel.
Figure 8 - Minimum Mantel Clearances When Using Hood
Mantel Shelf
Determining Minimum Mantel Clearance When Using a Hood
If above minimum clearances are not met, you must have a hood. Follow minimum
clearances shown in Figure 8 when using hood.
INSTALLATION
Continued
If reasons number 1 or 2 above apply to you,
you must permanently open chimney flue
damper. You must install the damper clamp
accessory (to order, see Accessories, page
23). This will insure vented operation (see
Figure 11). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.
See chart below for minimum permanent
flue opening you must provide. Attach
damper clamp so the minimum permanent
flue opening will be maintained at all times.
Continued