Desa HD18NA Owner's Operation And Installation Manual page 12

See chart below for minimum permanent flue
opening you must provide. Attach damper
clamp so the minimum permanent flue open-
ing will be maintained at all times.
Area of Various Standard Round Flues
Diameter
5"
6"
7"
8"
Chimney Height Minimum Permanent
6' to 15'
15' to 30'
INSTALLING HEATER BASE
ASSEMBLY
CAUTION: Do not remove the
data plates attached to the heater
base assembly. The data plates
contain important warranty and
safety 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
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.
12
INSTALLATION
Continued
Area
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
Flue Opening
39 sq. inches
29 sq. inches
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CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base as-
sembly by grates.
IMPORTANT: Make sure heater burners 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
• flathead screwdriver
1. Apply pipe joint sealant lightly to male
threads of fitting to be threaded into gas
regulator. Connect approved flexible gas
hose to gas regulator of heater (see Fig-
ure 10).
IMPORTANT: Hold gas regulator with
wrench when connecting flexible gas hose.
2. Locate masonry screws in hardware
package.
3. Position heater base assembly in fire-
place.
4. Place logs in their proper position on heater
base (see Installing Logs, page 16).
5. Center heater base and logs front-to-front
and side-to-side in fireplace.
6. Carefully remove logs without moving
heater base.
Flexible Gas Hose
(if allowed by local codes)
Figure 10 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Fitting
Heater Gas
Regulator
123168-01C