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104416
UNVENTED NATURAL GAS LOG HEATER
DESA INTERNATIONAL
INSTALLATION
Continued
INSTALLING HEATER BASE
ASSEMBLY
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
fireplace floor to allow access to
heater control panel. This will
insure adequate air flow and
guard against sooting. Raise
fireplace floor with
noncombustible material. 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.
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.
CAUTION: Do not remove the
metal data plates attached to the
heater base assembly. The data
plates contain important warranty
information.
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 operat-
ing 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.
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 2.9 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
Figure 10 - Attaching Damper Clamp
Damper
Damper Clamp
Damper
Clamp
Damper
Damper
Manufactured Fireplace
Masonry Fireplace