Desa CDR3924NT - Manual (Page 11)

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INSTALLATION
Continued
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 in-
sure adequate air flow and guard
against sooting and controls be-
ing damaged. Raise fireplace floor
with noncombustible 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
sides of base.
IMPORTANT: Make sure the heater burners are
level. If heater is not level, heater will not work
properly. 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 24.
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose and fitting (not
provided) (if allowed by local codes)
• sealant (resistant to propane/LP gas, not pro-
vided)
• electric drill with 3/16" drill bit (metal or ma-
sonry as applicable)
• flathead screwdriver
1. Connect fitting to base as shown in Figure 10.
Connect approved flexible gas hose to fitting
in base (see Figure 10).
IMPORTANT: Hold gas fitting with wrench
when connecting flexible gas hose.
Figure 10 - Attaching Flexible Gas Hose
to Heater
Fitting
Flexible Gas
Hose (if allowed
by local codes)
Figure 11 - Attaching Base Assembly to
Fireplace Floor
Masonry
Screw
Mounting
Flange
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 14).
5. Center heater base and logs front-to-back and
side-to-side in fireplace.
6. Carefully remove logs without moving heater
base.
7. Mark screw locations through one hole on
each side of the mounting bracket (see Figure
11). If installing in a brick-bottom fireplace,
mark screw locations in mortar joint of
bricks.
8. Remove heater base from fireplace. If install-
ing optional control accessories, do so at this
time. Follow all directions provided with
accessory.
9. Drill holes at marked locations using 3/16"
drill bit.
10. Attach base assembly to fireplace floor using
two masonry screws (in hardware package).