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110882-01C
For more information, visit www.desatech.com
For more information, visit www.desatech.com
10
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 36). 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' 29 sq. inches
INSTALLATION
Continued
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.
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 con-
trols being damaged. Raise fireplace floor with noncom-
bustible 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 27.
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" masonry drill bit
Note:
Install optional GHRCTA Receiver and Hand-Held Remote
Control Kit (see Accessories, page 36) before installing gas log
heater (Remote-Ready Models Only). See installation instructions
included with the kit.
1. Apply pipe joint sealant lightly to male threads of gas fitting
(not provided). For Variable Manually-Controlled and Ther-
mostatically-Controlled Models connect approved flexible gas
hose to gas regulator of heater (see Figure 11, page 11). For
Remote-Ready models connect approved flexible gas hose to
inlet side of gas control (see Figure 12, page 11).
IMPORTANT:
Hold gas regulator with wrench when connect-
ing flexible gas hose (Variable Manually-Controlled and Ther-
mostatically-Controlled Models Only).
2. Locate mounting brackets, bolts, and nuts in hardware pack-
age (Variable Manually-Controlled and Thermostatically-Con-
trolled Models Only). Attach mounting brackets to heater base
(see Figure 13, page 11). Attach nuts finger tight.
INSTALLATION
Installing Damper Clamp Accessory for Vented Operation
Installing Heater Base Assembly
Figure 10 - Attaching Damper Clamp
Damper
Damper Clamp
Damper
Manufactured Fireplace
Masonry Fireplace
Damper Clamp
Damper