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DESA INTERNATIONAL
UNVENTED PROPANE/LP GAS LOG HEATER
INSTALLATION
Continued
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 noncombustible 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.
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
25). 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.)
Area (sq. ins.)
5"
20 sq. inches
6"
29 sq. inches
7"
39 sq. inches
8"
51 sq. inches
Chimney
Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15'
39 sq. inches
15' to 30'
2.9 sq. inches
Damper Clamp
Damper
Masonry Fireplace
Figure 10 - Attaching Damper Clamp
INSTALLING HEATER BASE
ASSEMBLY
WARNING: Do not remove
the metal data plates attached to
the heater base assembly. The
data plates contain important
warranty information.
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the fire-
place floor to allow access to
heater control panel. This will in-
sure adequate air flow and guard
against sooting. Raise fireplace
floor with noncombustible mate-
rial. Make sure material is secure.
CAUTION: Do not pick up
heater base assembly by burn-
ers. This could damage heater.
Only handle base assembly by
grates.
IMPORTANT: Make sure the heater burn-
ers are level. If heater is not level, heater will
not work properly.
10
Damper
Manufactured Fireplace
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose (not provided)
(if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit
Note: Install optional GHRCT Receiver
and Hand-Held Remote Control Kit (see
Accessories, page 25) before installing gas
log heater. See installation instructions in-
cluded with the kit.
1.
Apply pipe joint sealant lightly to male
threads of gas fitting. Connect approved
flexible gas hose to inlet side of gas
control (see Figure 11, page 11).
2.
Position heater base assembly in fire-
place.
3.
Mark screw locations through holes in
front panel of base (see Figure 12, page
11). If installing in a brick-bottom fire-
place, mark screw locations in mortar
joint of bricks.
4.
Remove heater base from fireplace.
5.
Drill holes at marked locations using
3/16" masonry drill bit.
6.
Attach base to fireplace floor using
masonry screws (in hardware package).
7.
Connect to gas supply. See Connect-
ing To Gas Supply, page 11.
Damper
Clamp
Damper
104417
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