Desa CDR3924NT Owner's Operation And Installation Manual page 11

FLOOR CLEARANCES
A. If installing appliance on the floor level,
you must maintain the minimum distance
of 14" to combustibles (see Figure 8).
B. If combustible materials are less than 14"
to the fireplace, you must install appliance
at least 5" above the combustible flooring
(see Figure 9).
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
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.
122270-01D
INSTALLATION
Continued
Combustible
Material
14"
Min.
Noncombustible Material
Hearth
Combustible
Material
5"
Min.
www.desatech.com
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 Posi-
tioning 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
provided)
• electric drill with 3/16" drill bit (metal or
masonry 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.
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, page 12). If installing in a brick-
bottom fireplace, mark screw locations in
mortar joint of bricks.
Flexible Gas
Hose (if allowed
by local codes)
Figure 10 - Attaching Flexible Gas Hose
to Heater
Fitting
11