Desa H18N Owner's Operation And Installation Manual page 13

Area of Various Standard Round Flues
Diameter
5"
6"
7"
8"
Chimney Height
6' to 15'
15' to 30'
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 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
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.
110399-01J
INSTALLATION
Continued
Area
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
Minimum Permanent
Flue Opening
39 sq. inches
29 sq. inches
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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 Models con-
nect approved flexible gas hose to gas
regulator of heater (see Figure 1). For
Remote-Ready models connect approved
flexible gas hose to gas control fitting in
heater (see Figure 12).
IMPORTANT: Hold gas regulator with
wrench when connecting flexible gas hose
(Variable Manually-Controlled Models
Only). Hold gas fitting with wrench when
connecting flexible gas hose (Remote-
Ready Models Only).
2. Locate two masonry screws in hardware
package.
3. Place heater base in fireplace.
4. Place logs in their proper position on heater
base (see Installing Logs, page 16).
Fitting
Flexible Gas Hose (if
allowed by local codes)
Figure 11 - Attaching Flexible Gas
Hose to Heater Gas Regulator (Variable
Manually-Controlled Models Only)
Fitting
Figure 12 - Attaching Flexible Gas Hose
to Heater (Remote-Ready Models Only)
Heater Gas
Regulator
Flexible Gas Hose (if
allowed by local codes)
13