Desa CDL3924NT Owner's Operation And Installation Manual page 11

INSTALLATION
Continued
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
of the following:
• operate the logs only with the
flue damper open
• raise the mantel to an accept-
able height
• remove the mantel
FLOOR CLEARANCES
A. If installing appliance on the floor level, you
must maintain the minimum distance of 14"
to combustibles (see Figure 8).
B. If combustible materials are less than 14" to
the fireplace, you must install appliance at
least 5" above the combustible flooring (see
Figure 9).
Noncombustible Material
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
111347-01E
Combustible
Material
14"
Min.
Noncombustible Material
Hearth
Combustible
Material
5"
Min.
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INSTALLING DAMPER CLAMP
ACCESSORY FOR VENTED
OPERATION
Note: When used as a vented heater, appliance
must be installed only in a solid-fuel burning
fireplace with a working flue and constructed of
noncombustible material.
If your heater is a manually-controlled model, you may
use this heater as a vented product. There are three rea-
sons for operating your heater in the vented mode.
1. The fireplace does not meet the clearance to com-
bustibles requirements for vent-free operation.
2. State or local codes do not permit vent-free
operation.
3. You prefer vented operation.
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 27). This will insure vented
operation (see Figure 10). 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.
Area of Various Standard Round Flues
Diameter (ins.)
5"
6"
7"
8"
Chimney
Height (ft.)
6' to 15'
15' to 30'
Damper Clamp
Damper
Masonry Fireplace
Figure 10 - Attaching Damper Clamp
Area (sq. ins.)
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
Minimum Permanent
Flue Opening (sq. ins.)
39 sq. inches
29 sq. inches
Damper
Manufactured Fireplace
11