Desa CGB3924PR - Manual (Page 10)

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UNVENTED PROPANE/LP GAS LOG HEATER
CGD3924PR, CGB3924PR and CGB3930PR
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
• two (2) 9-volt alkaline batteries (not in-
cluded)
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 21.
The installer must supply an external regu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incoming gas pressure to between 11 and 14
inches of water. If you do not reduce incom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure
12. Pointing the vent down protects it from
freezing rain or sleet.
Propane
Supply Tank
External Regulator
Vent Pointing Down
Figure 12 - External Regulator With Vent
Pointing Down
Figure 11 - Attaching Base Assembly to
Fireplace Floor
CONNECTING TO GAS
SUPPLY
NOTICE: A qualified service per-
son must connect heater to gas
supply. Follow all local codes.
CAUTION: Never connect
heater directly to the propane
supply. This heater requires an
external regulator (not supplied).
Install the external regulator be-
tween the heater and propane
supply.
Figure 10 - Attaching Flexible Gas Hose
to Heater
INSTALLATION
Continued
INSTALLING HEATER BASE
ASSEMBLY
IMPORTANT: Make sure the heater burn-
ers 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" masonry drill bit
1. Apply pipe joint sealant lightly to male
threads of the fitting to be threaded into
gas regulator. Connect approved flex-
ible gas hose to gas regulator of heater
(see Figure 10).
2. Locate masonary screws in hardware
package.
3. Position heater base assembly in
fireplace.
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the fire-
place floor to allow access to
heater control panel. This will in-
sure adequate air flow and guard
against sooting. Raise fireplace
floor with non-combustible mate-
rial. Make sure material is secure.
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base assem-
bly by grates.
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.
4. Mark screw locations through holes in
mounting flanges (see Figure 11). If in-
stalling in a brick-bottom fireplace,
mark screw locations in mortar joint of
bricks.
5. Remove heater base from fireplace.
6. Drill holes at marked locations using
3/16" masonry drill bit.
7. Attach base assembly to fireplace floor
using two masonry screws (in hardware
package) (see Figure 11).
8. Connect to gas supply. See Connect-
ing To Gas Supply.
Flexible Gas Hose (if
allowed by local codes)
Fitting
Masonry
Screw
Mounting
Flanges
CAUTION: Do not remove the
metal data plates attached to the
heater base assembly. The data
plates contain important warranty
information.