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INSTALLATION
Continued
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 reasons for operating
your heater in the vented mode.
1.
The fireplace does not meet the clearance to combustibles re-
quirements 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 31). 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.) Flue Opening (sq. ins.)
6' to 15'
15' to 30'
Damper Clamp
Damper
Masonry Fireplace
Manufactured Fireplace
Figure 10 - Attaching Damper Clamp
For more information, visit www.desatech.com
For more information, visit www.desatech.com
110399-01B
Area (sq. ins.)
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
Minimum Permanent
39 sq. inches
29 sq. inches
Damper Clamp
Damper
Installing Damper Clamp Accessory for Vented Operation
INSTALLING HEATER BASE ASSEMBLY
WARNING: You must secure this heater to fire-
place floor. If not, heater will move when you adjust
controls. Moving heater may cause a gas leak or log
misplacement.
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 and controls being damaged. Raise fire-
place floor with noncombustible material. Make sure
material is secure.
CAUTION: Do not pick up heater base assembly by
burners. This could damage heater. Only handle base
assembly by grates.
IMPORTANT: Make sure the heater burners are level. If heater is
not level, heater will not work properly. For thermostat models,
avoid damage to thermostat bulb. Avoid nicks or sharp bends in
thermostat bulb wire. Keep thermostat bulb in mounting bracket
until ready to mount base to floor. See Optional Positioning Of
Thermostat Sensing Bulb, page 28.
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose and fittings (not provided) (if allowed
by local codes)
• sealant (resistant to propane/LP gas, not provided)
• electric drill with 3/16" drill bit (metal or masonry as applicable)
• flathead screwdriver
• pipe wrench
1. Apply pipe joint sealant lightly to male threads of gas fitting
(not provided). For Variable Manually-Controlled and Ther-
mostat-Controlled Models connect approved flexible gas hose
to gas regulator of heater (see Figure 11, page 12). For Re-
mote-Ready models connect approved flexible gas hose to gas
control fitting in heater (see Figure 12, page 12).
IMPORTANT: Hold gas regulator with wrench when connect-
ing flexible gas hose (Variable Manually-Controlled and Ther-
mostat-Controlled Models Only). Hold gas fitting with wrench
when connecting flexible gas hose (Remote-Ready Models Only).
Damper
2. Locate two masonry screws in hardware package.
3. Place heater base in fireplace.
INSTALLATION
Installing Heater Base Assembly
11
11
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