Desa R series Owner's Manual page 12

INSTALLATION
Continued
If reasons number 1 or 2 apply to you, you must
permanently open chimney flue damper. You must
install the damper clamp accessory (to order, see
Accessories, page 42). 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
5"
6"
7"
8"
Chimney
Height
6' to 15'
15' to 30'
Damper
Damper
Clamp
Damper
Masonry Fireplace
Figure 10 - Attaching Damper Clamp
12
Area
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
Minimum Permanent
Flue Opening
39 sq. inches
29 sq. inches
Damper
Manufactured
Fireplace
www.desatech.com
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 and
controls being damaged. Raise
fireplace floor with noncombus-
tible 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 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 33.
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 pro-
vided)
• electric drill with 3/16" masonry drill bit
Note: Install optional HRC200 Receiver and
Hand-Held Remote Control Kit (see Accessories,
page 42) before installing gas log heater (Remote-
Ready Models Only). See installation instructions
included with the kit.
110882-01K