Desa CCL3924NR Owner's Operation And Installation Manual page 12

Unvented (vent-free) gas log heater
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Determining Minimum Mantel Clearances
When Using a Hood
If minimum clearances in Figure 6, page 11,
are not met, you must have a hood. When
using a hood there are still certain minimum
mantel clearances required. Follow minimum
clearances shown in Figure 7, page 11, when
using hood.
NOTICE: Surface temperatures
of adjacent walls and mantels be-
come hot during operation. Walls
and mantels above the firebox
may become hot to the touch.
If installed properly, these tem-
peratures meet the requirements
of the national product standard.
Follow all minimum clearances
shown in this manual.
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
of the following:
• operate logs only with flue
damper open
• raise mantel to an acceptable
height
• remove 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).
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
12
INSTALLATION
Continued
Combustible
Material
14"
Min.
Noncombustible Material
www.desatech.com
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
INSTALLING DAMPER CLAMP AC-
CESSORy FOR VENTED OPERATION
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.
If you choose to use your heater as a manu-
ally-controlled model (no remote control
installed), you may use this heater as a vented
product. There are three reasons for operating
your heater in the vented mode.
1. Fireplace does not meet the clearance to
combustibles 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
34). This will insure vented operation (see
Figure 10, page 13). 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 open-
ing will be maintained at all times.
Chimney Height
6' to 15'
15' to 30'
Area of Various Standard Round Flues
Diameter
5"
6"
7"
8"
Hearth
Combustible
Material
5"
Min.
Minimum Permanent
Flue Opening
39 sq. inches
29 sq. inches
Area
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
111161-01K

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