Desa CRL3124PA/NA Quick start guide

UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Biltmore Split Oak, Seasonal Oak and Smoky Mountain Oak Logs
Variable Manually-Controlled Models Also
Design-Certied As Vented Decorative Appliances
18", 24" AND 30" VARIAbLE
MANUALLy-CONTROLLED
MODELS
CRL2718PA/NA
CRL3124PA/NA
18", 24" AND 30"
THERMOSTATICALLy-CONTROLLED
MODELS
CCL3018PTA/NTA
CCL3924PTA/NTA
Patent Pending
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For more information, visit www.desatech.com
WARNING: If the information in this manual is not
followed exactly, a re or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re
department.
— Installation and service must be performed by a quali-
ed installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.

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SAFETy
WARNING: Improper
installation, adjustment,
alteration, service or
maintenance can cause
injury or property dam-
age. Refer to this manual
for correct installation
and operational proce-
dures. For assistance or
additional information
consult a qualified in-
staller, service agency or
the gas supplier.
WARNING: This ap-
pliance is for installation
only in a solid-fuel burning
masonry or UL127 factory-
built replace or in a listed
ventless firebox enclo-
sure. It is design-certied
for these installations in
accordance with ANSI
Z21.11.2. Exception: Do
not install this appliance
in a factory-built replace
that includes instructions
stating it has not been test-
ed or should not be used
with unvented gas logs.
WARNING: This is an
unvented gas-red heat-
er. It uses air (oxygen)
from the room in which
it is installed. Provisions
for adequate combustion
and ventilation air must
be provided. Refer to Air
for Combustion and Ven-
tilation section on page 6
of this manual.
This appliance may be in-
stalled in an aftermarket,*
permanently located,
manufactured (mobile)
home, where not prohib-
ited by local codes.
This appliance is only for
use with the type of gas
indicated on the rating
plate. This appliance is
not convertible for use
with other gases.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer
TAbLE OF CONTENTS
Safety .................................................................. 2
Product Identication........................................... 5
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features ................................................. 5
Air for Combustion and Ventilation ...................... 6
Installation ........................................................... 8
Operation........................................................... 19
Inspecting Burners............................................. 23
Cleaning and Maintenance................................ 23
Service Hints ..................................................... 24
Technical Service............................................... 24
Troubleshooting................................................. 25
Optional Positioning of Thermostat Sensing Bulb . . 29
Specications .................................................... 30
Accessories ....................................................... 31
Parts Central...................................................... 31
PARTS............................................................... 32
Replacement Parts ............................................ 35
Warranty ..............................................Back Cover

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113097-01L 3
WARNING: This product
contains and/or generates
chemicals known to the state
of California to cause cancer or
birth defects or other reproduc-
tive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble,
operate or service this heater.
Improper use of this heater can
cause serious injury or death
from burns, fire, explosion,
electrical shock and carbon
monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the
u, with headaches, dizziness or nausea. If
you have these signs, the heater may not be
working properly. Get fresh air at once! Have
heater serviced. Some people are more af-
fected by carbon monoxide than others. These
include pregnant women, people with heart or
lung disease or anemia, those under the inu-
ence of alcohol and those at high altitudes.
Natural and Propane/LP Gas: Natural and
propane/LP gases are odorless. An odor-
making agent is added to the gas. The odor
helps you detect a gas leak. However, the
odor added to the gas can fade. Gas may be
present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this heater.
WARNING: Any change to
this heater or its controls can
be dangerous.
SAFETy
Continued
WARNING: Do not allow fans
to blow directly into the replace.
Avoid any drafts that alter burner
ame patterns. Ceiling fans can
create drafts that alter burner
ame patterns. Altered burner
patterns can cause sooting.
WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not ap-
proved for use with this heater.
Due to high temperatures, the
appliance should be located out
of trafc and away from furniture
and draperies.
Do not place clothing or other
ammable material on or near
the appliance. Never place any
objects on the heater.
Heater base assembly becomes
very hot when running heater.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Heater
will remain hot for a time after
shutdown. Allow surface to cool
before touching.
Carefully supervise young chil-
dren when they are in the room
with heater.
You must operate this heater
with a replace screen in place.
Make sure replace screen is
closed before running heater.
Keep the appliance area clear
and free from combustible ma-
terials, gasoline and other am-
mable vapors and liquids.

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1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP units
only).
3. To prevent performance problems, do
not use propane/LP fuel tank of less than
100 lb. capacity (propane/LP units only).
4. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not
use any phone in your building
• immediately call your gas supplier from
a neighbor’s phone. Follow the gas sup-
plier’s instructions
• if you cannot reach your gas supplier,
call the re department
5. This heater shall not be installed in a
bedroom or bathroom unless installed as
a vented appliance (Variable Manually-
Controlled Models Only) (see Installing
Damper Clamp Accessory for Vented
Operation, page 12). This gas log set may
not be installed as a vented appliance in
a bedroom or bathroom in the Common-
wealth of Massachusetts.
6. Before installing in a solid fuel burning re-
place, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.
Creosote will ignite if highly heated. A dirty
chimney ue may create and distribute
soot within the house. Inspect chimney
ue for damage. If damaged, repair ue
and rebox before operating heater.
7. Do not burn solid-fuel in a masonry or
UL127 factory-built replace in which a
vent-free room heater is installed.
8. If replace has glass doors, never operate
this heater with glass doors closed. If you
operate heater with doors closed, heat
buildup inside replace will cause glass to
burst. Make sure there are no obstructions
across openings of replace.
9. This log heater is designed to be smoke-
less. If logs ever appear to smoke, turn off
heater and call a qualied service person.
Note: During initial operation, slight smok-
ing could occur due to log curing and
heater burning manufacturing residues.
10. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 23.
11. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
12. This heater needs fresh, outside air ven-
tilation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if not enough fresh air is available.
See Air for Combustion and Ventilation,
page 6. If heater keeps shutting off, see
Troubleshooting, page 25.
13. Do not run heater
• where ammable liquids or vapors are
used or stored
• under dusty conditions
14. Do not use this heater to cook food or burn
paper or other objects.
15. Do not use heater if any part has been ex-
posed to or under water. Immediately call
a qualied service technician to inspect
the room heater and to replace any part
of the control system and any gas control
which has been under water.
16. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped
(dime-sized or larger).
17. Turn heater off and let cool before servic-
ing. Only a qualied service person should
service and repair heater.
18. Operating heater above elevations of
4,500 feet could cause pilot outage.
19. Provide adequate clearances around air
openings.
SAFETy
Continued

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113097-01L 5
Figure 1 - Vent-Free Gas Log Heater
(Logs May Vary by Model, Seasonal Oak Single Burner Model Shown)
Base Grate
Log Set
Control Knob
Burner
Piezo
Ignitor
PRODUCT IDENTIFICATION
State of Massachusetts: The installa-
tion must be made by a licensed plumber
or gas fitter in the Commonwealth of
Massachusetts.
Sellers of unvented propane or natural
gas-red supplemental room heaters shall
provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for
bedroom and bathroom installation in the
Commonwealth of Massachusetts.
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes,
use the latest edition of The National Fuel
Gas Code, ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Note: Where listed vented decorative logs are re-
quired, thermostat operation is not permitted.
UNPACkING
CAUTION: Do not remove the
data plates from the grate as-
sembly. The data plates contain
important product information.
1. Remove logs and heater base assembly
from carton. Note: Do not pick up heater
base assembly by burners. This could
damage heater. Always handle base as-
sembly by grate.
2. Remove all protective packaging applied
to logs and heater for shipment.
3. Check heater for any shipping damage.
If heater is damaged call DESA Heating,
LLC at 1-866-672-6040 for replacement
parts before returning to dealer.
PRODUCT FEATURES
OPERATION
This heater is clean burning. It requires no outside
venting. There is no heat loss out a vent or up a
chimney. Heat is generated by realistic dancing,
yellow ames. This heater is designed for vent-
free operation with ue damper closed. It has been
tested and approved to ANSI Z21.11.2 standard
for unvented heaters. State and local codes in
some areas prohibit the use of vent-free heaters.
This heater may also be operated as a vented
decorative (ANSI Z21.60) product by opening the
ue damper (non-thermostat operation only).
SAFETY PILOT
This heater has a pilot with an Oxygen Deple-
tion Sensing (ODS) safety shutoff system. The
ODS/pilot is a required feature for vent-free
room heaters. The ODS/pilot shuts off the
heater if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system re-
quires no matches, batteries or other sources
to light heater.

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Unusually tight construction is dened
as construction where:
a. walls and ceilings exposed to the out-
side atmosphere have a continuous
water vapor retarder with a rating of one
perm (6x10-11 kg per pa-sec-m2) or less
with openings gasketed or sealed and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to
areas such as joints around window
and door frames, between sole plates
and oors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.
If your home meets all of the three criteria
above, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 8.
If your home does not meet all of the three
criteria above, proceed to Determining Fresh-
Air Flow for Heater Location.
Conned and Unconned Space
National Fuel Gas Code, ANSI Z223.1/NFPA
54 denes a conned space as a space whose
volume is less than 50 cubic feet per 1,000 Btu/
hr (4.8 m3 per kw) of the aggregate input rating
of all appliances installed in that space and an
unconned space as a space whose volume
is not less than 50 cubic feet per 1,000 Btu/hr
(4.8 m3 per kw) of the aggregate input rating of
all appliances installed in that space. Rooms
communicating directly with the space in which
the appliances are installed*, through openings
not furnished with doors, are considered a part
of the unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Conned or
Unconned Space
Use this work sheet to determine if you have
a conned or unconned space.
Space: Includes the room in which you will install
replace plus any adjoining rooms with door-
less passageways or ventilation grills between
the rooms.
1. Determine the volume of the space (length
x width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
AIR FOR COMbUSTION AND VENTILATION
WARNING: This heater shall
not be installed in a room or space
unless the required volume of
indoor combustion air is provided
by the method described in the
National Fuel Gas Code, ANSI
Z223.1/NFPA54, the International
Fuel Gas Code, or applicable
local codes. Read the following
instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efcient
than ever. New materials, increased insulation
and new construction methods help reduce
heat loss in homes. Home owners weather
strip and caulk around windows and doors
to keep the cold air out and the warm air in.
During heating months, home owners want
their homes as airtight as possible.
While it is good to make your home energy
efcient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning ap-
pliances need fresh air for proper combustion
and ventilation.
Exhaust fans, replaces, clothes dryers and
fuel burning appliances draw air from the house
to operate. You must provide adequate fresh
air for these appliances. This will insure proper
venting of vented fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 6 through 8 will help
you classify your space and provide adequate
ventilation.
Unusually Tight Construction
The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.

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113097-01L 7
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2,560 cu. ft.
(volume of space)
If additional ventilation to adjoining room
is supplied with grills or openings, add the
volume of these rooms to the total volume
of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 cu. ft. (volume of space) x
20 = 51,200 (maximum Btu/Hr the space can
support)
3. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free replace __________ Btu/Hr
Gas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/Hr
Other gas appliances* + _________ Btu/Hr
Total = _________ Btu/Hr
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater __________ Btu/Hr
Vent-free replace + _________ Btu/Hr
Total = _________ Btu/Hr
4. Compare the maximum Btu/Hr the space can
support with the actual amount of Btu/Hr used.
_______ Btu/Hr (maximum the space can
support)
_______ Btu/Hr (actual amount used)
Example: 51,200 Btu/Hr (maximum the
space can support)
79,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a conned space
because the actual Btu/Hr used is more than the
maximum Btu/Hr the space can support. You
must provide additional fresh air. Your options
are as follows:
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides an
unconned space, remove door to adjoining
room or add ventilation grills between rooms.
See Ventilation Air From Inside Building.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
C. Install a lower Btu/Hr replace, if lower Btu/
Hr size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional
fresh air ventilation.
WARNING: If the area in which
the heater may be operated does
not meet the required volume for
indoor combustion air, combus-
tion and ventilation air shall be
provided by one of the methods
described in the National Fuel
Gas Code,ANSI Z223.1/NFPA54,
the International Fuel Gas Code,
or applicable local codes.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconned space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the oor on the
wall connecting the two spaces (see options
1 and 2, Figure 2). You can also remove door
into adjoining room (see option 3, Figure 2).
Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
AIR FOR COMbUSTION AND VENTILATION
Continued
40,000
39,000
79,000
Figure 2 - Ventilation Air from Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option
3
Ve ntilation Grills
Into Adjoining Room,
Option 2
Ve ntilation
Grills Into
Adjoining
Room,
Option 1
12"
12"

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INSTALLATION
WARNING: Before installing
in a solid fuel burning replace,
the chimney ue and rebox
must be cleaned of soot, creo-
sote, ashes and loose paint by
a qualified chimney cleaner.
Creosote will ignite if highly
heated. A dirty chimney ue may
create and distribute soot within
house. Inspect chimney ue and
rebox for damage. If damaged,
repair ue and rebox before
operating heater.
WARNING: Seal any fresh
air vents or ash clean-out doors
located on oor or wall of re-
place. If not, drafting may cause
pilot outage or sooting. Use a
heat-resistant sealant. Do not
seal chimney ue damper.
Figure 3 - Ventilation Air from Outdoors
Outlet
Air
V e ntilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air V e ntilated
Crawl Space
T o
Crawl
Space
T o Attic
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
and one within 12" of the oor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, SAir for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermo-
AIR FOR COMbUSTION AND VENTILATION
Continued
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
NOTICE: This heater is intended
for use as supplemental heat.
Use this heater along with your
primary heating system. Do not
install this heater as your pri-
mary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using log heater. This will
help circulate the heat from your
logheaterthroughoutthehouse.
In the event of a power outage,
you can use this heater as your
primary heat source.
WARNING: A qualied ser-
vice person must install heater.
Follow all local codes.
NOTICE: State or local codes
may only allow operation of this
appliance in a vented congura-
tion. Check your state or local
codes.

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113097-01L 9
INSTALLATION AND CLEARANCES
(Vent-Free Operation Only)
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
oor, ceiling and adjoining wall.
MINIMUM FIREPLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Side Wall 16", Ceiling 42"
LOG SIZING REQUIREMENTS
Minimum Firebox
Log
Size Height Depth
Front
Width
Rear
Width*
18" 17" 14" 24" 20"
24" 17" 14" 28" 21"
* Measured at 14" depth.
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured replace or certi-
ed vent-free rebox.
Minimum Clearances For Side Combus-
tible Material, Side Wall and Ceiling
A. Clearances from side of replace cabinet
to any combustible material and wall
should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3 1/2" from the wall. This com-
bustible material must be 4" from side of
replace opening (see Figure 4).
Note: When installing your gas logs into
a manufactured rebox, follow rebox
manufacturer’s instructions for minimum
clearances to combustible materials.
B. Clearances from top of replace opening
to ceiling should not be less than 42".
INSTALLATION
Continued
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
Example
*
WARNING: Never install the
heater
• in a bedroom or bathroom
unless installed as a vented
appliance (Variable Manually-
Controlled Models Only) (see
page 12)
• in a recreational vehicle
• where curtains, furniture,
clothing or other ammable
objects are less than 42" from
front, top or sides of heater
• in high trafc areas
• in windy or drafty areas
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as, but
not limited to, tobacco smoke,
aromatic candles, cleaning u-
ids, oil or kerosene lamps, etc.) in
the air exist, may discolor walls
or cause odors.
IMPORTANT:Vent-free heaters add moisture
to the air. Although this is benecial, installing
heater in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventila-
tion, page 6.
CHECK GAS TYPE
Use the correct gas type (natural or propane/
LP) for your unit. If your gas supply is not cor-
rect, do not install heater. Call dealer where
you bought heater for proper type heater.
WARNING: This appliance is
equipped for either natural gas
or propane/LP gas but not both.
Gas type is indicated on the rat-
ing plate. Field conversion is not
permitted.

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INSTALLATION
Continued
Noncombus-
tible Material
Distance (A)
Requirements for Safe
Installation
12" or more Noncombustible material
okay.
Between 8"
and 12"
24" Models: Install replace
hood accessory (GA6050,
GA6052 or GA6053 see
Accessories, page 38).
18" Model: Noncombustible
material okay.
Less than 8" Noncombustible material
must be extended to at least
8". See Between 8" and 12",
above. If you cannot extend
material, you must operate
heater with ue damper open.
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between replace opening and
mantel shelf. If you do not meet the clearances
in Figure 6, page 11 you will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between man-
tel shelf and top of replace opening, a hood
is not required (see Figure 6, page 11).
Determining Minimum Mantel Clearance
When Using a Hood
If minimum clearances in Figure 6 are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearances required. Follow minimum clear-
ances shown in Figure 7, page 11 when
using hood.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
NOTICE: Manual control heaters
may be used as a vented product.
If so, you must always run heater
with chimney ue damper open.
If running heater with damper
open, noncombustible material
above replace opening is not
needed. Go to Installing Damper
Clamp Accessory for Vented
Operation, page 12.
Minimum Noncombustible Material
Clearances
If Not Using Mantel
Note: If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the infor-
mation below.
You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.) must
be at least 1/2" thick. With sheet metal, you
must have noncombustible material behind
it. Noncombustible material must extend at
least 8" up. If noncombustible material is less
than 12", you must install the replace hood
accessory (24" models only). See Figure 5 for
minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney ue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 11.
If Using Mantel
You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.) must
be at least 1/2" thick. With sheet metal, you
must have noncombustible material behind it.
Noncombustible material must extend at least
8" up. If noncombustible material is less than
12", you must install the replace hood acces-
sory (24" models only). Even if noncombustible
material is more than 12", you may need the
hood accessory to deect heat away from your
mantel shelf. See Figure 5 and Figure 6 and 7
on page 11 for minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney ue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 12.

www.desatech.com
113097-01L 11
NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the
firebox may become hot to
the touch. If installed properly,
these temperatures meet the
requirement of the national
product standard. Follow all
minimum clearances shown in
this manual.
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
T o p of Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
12"
8"
(A)
18"
8"
20"
14"
22"
17"
24"
20"
All minimum
distances
are in inches
Log Set
24"/30"
Models
18" Model
2
1/2
"
6"
8"
10"
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
of the following:
• operate logs only with ue
damper open
• raise mantel to an acceptable
height
• remove mantel
FLOOR CLEARANCES
A. If installing appliance on the oor level,
you must maintain the minimum distance
of 14" to combustibles (see Figure 8).
B. If combustible materials are less than 14"
to the replace, you must install appliance
at least 5" above the combustible ooring
(see Figure 9).
INSTALLATION
Continued
Minimum
Noncombustible
Material 8"
Min.
12" 15" 18"
All minimum
distances are
in inches
Log Set
18", 24",
30" Models
20"
2 1/2"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052)
T o p of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
Figure 7 - Minimum Mantel Clearances
When Using Hood
(GA6050,
GA6052 and
GA6053)
All
Models
14"
Min.
Combustible
Material
Noncombustible
Material
Hearth
5"
Min.
Combustible
Material
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Figure 8 - Minimum Fireplace Clearances
if Installed at Floor Level

www.desatech.com 113097-01L12
INSTALLATION
Continued
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 replace oor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
WARNING: If installing in a
sunken replace, special care
is needed. You must raise the
replace oor to allow access
to heater control panel. This
will insure adequate air ow
and guard against sooting and
controls being damaged. Raise
replace oor with noncombus-
tiblematerial.Makesurematerial
is secure.
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base as-
sembly by grates.
Area of Various Standard Round Flues
Diameter Area
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Chimney
Height
Minimum Permanent
Flue Opening
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
Figure 10 - Attaching Damper Clamp
Manufactured
Fireplace
Masonry
Fireplace
Damper
Damper
Clamp
Damper
Damper
Clamp Damper
INSTALLING DAMPER CLAMP
ACCESSORY FOR VENTED
OPERATION
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning replace with a working ue and con-
structed of noncombustible material.
For Massachusetts Residents Only: Instal-
lation of this gas log set as a vented appliance
in the Commonwealth of Massachusetts re-
quires the damper be permanently removed
or welded in the fully open position.
If your heater is a manually-controlled model,
you may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.
1. The replace does not meet the clearance
to combustibles requirements for vent-
free operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
If reasons number 1 or 2 above apply to you,
you must permanently open chimney ue
damper. You must install the damper clamp
accessory (to order, see Accessories, page
31). This will insure vented operation (see Fig-
ure 10). The damper clamp will keep damper
open. Installation instructions are included
with clamp accessory.
See chart for minimum permanent ue open-
ing you must provide. Attach damper clamp
so the minimum permanent ue opening will
be maintained at all times.

www.desatech.com
113097-01L 13
INSTALLATION
Continued
IMPORTANT: Make sure the heater burners
are level. If heater is not level, heater will not
work properly. For thermostat models, 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 oor. See Optional
Positioning Of Thermostat Sensing Bulb,
page 29.
Installation Items Needed
• hardware package (provided with heater)
• approved exible gas hose (not provided)
(if allowed by local codes)
• sealant resistant to propane (propane/LP)
gas, not provided
• electric drill with 3/16" drill bit
• athead screwdriver
1. Apply pipe joint sealant lightly to male
threads of the tting to be threaded into
gas regulator. Connect approved exible
gas hose to gas regulator of heater (see
Figure 11).
IMPORTANT: Hold gas regulator with
wrench when connecting exible gas hose.
2. Locate masonry screws in hardware
package.
3. Position heater base assembly in replace.
4. Place logs in their proper position on heater
base, see Installing Logs on page 16.
5. Center heater base and logs front-to-back
and side-to-side in replace.
6. Carefully remove logs without moving
heater base.
7. Mark screw locations through holes in
mounting brackets (see Figure 12 and
13). If installing in a brick-bottom replace,
mark screw locations in mortar joint of
bricks.
8. Remove heater base from replace.
9. Drill holes at marked locations using 3/16"
drill bit.
10. Attach base assembly to replace oor
using two masonry screws (in hardware
package) (see Figure 12 or 13).
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Figure 12 - Attaching Base Assembly to
Fireplace Floor - Dual Burner Model
Heater Gas
Regulator
Flexible Gas Hose
(if allowed by local codes)
Fitting
Masonry
Screw
Mounting
Bracket
Masonry
Screw
Figure 13 - Attaching Base Assembly to
Fireplace Floor - Single Burner Model
Mounting
Bracket
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 1/2" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualied ser-
vice person must connect heater
to gas supply. Follow all local
codes.

www.desatech.com 113097-01L14
CAUTION: Never connect
heater directly to the propane/LP
supply. This heater requires an
externalregulator(notsupplied).
Install the external regulator be-
tween the heater and propane/
LP supply.
WARNING: Never connect
natural gas replace to private
(non-utility) gas wells. This
gas is commonly known as
wellhead gas.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certied equipment
shutoff valve from your dealer. See Acces-
sories, page 31.
For propane/LP units, the installer must
supply an external regulator. The external
regulator will reduce incoming gas pressure.
You must reduce incoming gas pressure to
between 11" and 14" of water. If you do not re-
duce incoming gas pressure, heater regulator
damage could occur. Install external regulator
with the vent pointing down as shown in Figure
14. Pointing the vent down protects it from
freezing rain or sleet.
INSTALLATION
Continued
Figure 14 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank External
Regulator
with Vent
Pointing
Down
CAUTION: Use only new, black
ironorsteelpipe.Internally-tinned
copper tubing may be used in
certain areas. Check your local
codes. Use pipe of 1/2" diameter
or greater to allow proper gas vol-
ume to heater. If pipe is too small,
undue loss of volume will occur.
Installation must include an equipment shutoff
valve, union and plugged 1/8" NPT tap. Locate
NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see
Figure 15, page 15).
IMPORTANT: Install equipment valve in an
accessible location. The equipment shutoff
valve is for turning on or shutting off the gas
to the appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to replaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could
result in clogged heater valves.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
We recommend that you install a sediment trap
in supply line as shown in Figure 15, page 15.
Locate sediment trap where it is within reach
for cleaning. Install in piping system between
fuel supply and heater. Locate sediment trap
where trapped matter is not likely to freeze.
A sediment trap traps moisture and contami-
nants. This keeps them from going into heater
controls. If sediment trap is not installed or is
installed wrong, heater may not run properly.

www.desatech.com
113097-01L 15
CAUTION: Avoid damage to
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or ttings.
Figure 15 - Gas Connection
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer.
** Minimum inlet pressure for purpose of input
adjustment.
3" Minimum
Sediment Trap
Gas
Regulator
CSA Design-
Certied Equipment
Shutoff Valve With
1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
Tee Pipe Cap
Joint Nipple
PROPANE/LP
From External Regulator
(11" W.C.** to 14" W.C.
Pressure)
NATURAL
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external to unit, for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING: Never use an open
ame to check for a leak. Apply a
noncorrosive leak detection uid
toall joints.Bubbles formingshow
a leak. Correct all leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater.See guidelines underCon-
necting to Gas Supply, page 13.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply piping
system. Pressures in excess of 1/2 psig
will damage heater regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3. Pressurize supply piping by either opening
propane/LP supply tank valve for propane/
LP gas or opening main gas valve located
on or near gas meter for natural gas or
using compressed air.
4. Check all joints of gas supply piping system.
Apply a noncorrosive leak detection uid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected
ttings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Fig-
ure 16).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
3. Check all joints from gas meter to equip-
ment shutoff valve for natural gas or
propane/LP supply to equipment shutoff
valve for propane/LP (see Figures 17 and
18, page 16). Apply noncorrosive leak
detection uid to all joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Fig-
ure 16).
Figure 16 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
Open
Closed

www.desatech.com 113097-01L16
INSTALLING LOGS
CAUTION: After installa-
tion and periodically thereafter,
check to ensure that no ame
comes in contact with any log.
With the heater set to HI, check
to see if ames contact any log. If
so, reposition logs according to
the log installation instructions
in this manual. Flames contact-
ing logs will create soot.
WARNING: Failure to position
the parts in accordance with these
diagrams or failure to use only
parts specically approved with
this heater may result in property
damage or personal injury.
Dual Burner Biltmore Split Oak Models
CCL3018PTA/NTA, CCL3924PTA/NTA
Each log is marked with a number. These
numbers will help you identify the log when
installing. It is very important to install these
logs exactly as instructed. Do not modify logs.
Only use logs supplied with heater.
1. Place front log (#1) on grate ngers. Make
sure front log rests rmly between grate
ngers and grate base (see Figure 19).
2. Place base of middle log (#2) in U-shaped
slots of grate base. Cutout on right of
middle log should t over burner (see Fig-
ure 20, page 17). Make sure front of middle
log is resting on tabs of grate base.
INSTALLATION
Continued
Figure 19 - Installing Front Log #1
(CCL3924PTA/NTA Shown)
Front
Log (#1)
Grate
Fingers
Grate
Base
2. Open main gas valve located on or near
gas meter for natural gas or open pro-
pane/LP supply tank valve.
3. Make sure control knob of heater is in the
OFF position.
4. Check all joints from equipment shutoff
valve to thermostat gas valve (Ther-
mostat-Controlled Models) or to control
valve (Manually-Controlled Models) (see
Figures 17 and 18). Apply noncorrosive
leak detection uid to all joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 19
[manually-controlled models] or page
21 [thermostatically-controlled models]).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 20 [manually-controlled
models] or page 22 [thermostatically-
controlled models]).
Figure 17 - Checking Gas Joints
(Propane/LP Gas Models)
Equipment
Shutoff Valve
Propane/LP
Supply Tank
Thermostat Gas Valve or
Control Valve Location
Figure 18 - Checking Gas Joints (Natural
Gas Models)
Gas Meter
Equipment
Shutoff Valve
Thermostat Gas Valve or
Control Valve Location

www.desatech.com
113097-01L 17
INSTALLATION
Continued
Figure 20 - Installing Middle Log #2
(CCL3924PTA/NTA Shown)
Figure 21 - Installing Rear Log #3
(CCL3924PTA/NTA Shown)
Middle
Log (#2)
Tab
Burner
U-Shaped Slot
Hole in
Grate Base
Pins
Burner
Rear
Log (#3)
Figure 22 - Installing Crossover Log #4
(CCL3924PTA/NTA Shown)
Middle
Log (#2) Back Log
(#3)
Pins
Crossover
Log (#4)
6. Locate holes on bottom of crossover log
(#6). Slide these holes onto right pins locat-
ed in middle log (#2) and front log (#1). See
Figure 25, page 18 for CCL3924PTA/NTA.
See Figure 24 for CCL3018PTA/NTA.
7. Add lava rock around base of heater if
desired. Do not place any lava rock on
logs or burner.
Figure 23 - Installing Crossover Log #5
(CCL3924PTA/NTA Shown)
Crossover
Log (#4)
Front Log (#1)
Crossover
Log (#5)
3. Locate pins on bottom of back log (#3).
Slide these pins into holes in grate base
behind burner (see Figure 21).
4. Locate holes on bottom of crossover log (#4).
Slide front hole onto left pin (CCL3924PTA/
NTA) or middle pin (CCL3018PTA/NTA) on
middle log (#2) and pin on back log (#3).
See Figure 22, for placement.
5. For CCL3924PTA/NTA Only: Locate pin
and hole on bottom of crossover log (#5).
Slide pin into hole located in crossover log
(#4). Slide hole onto pin on front log (#1).
See Figure 23.
For CCL3018PTA/NTA Only: Locate
holes on bottom of crossover log (#5).
Slide holes over left pins on middle log
(#2) and front log (#1). See Figure 24.
Crossover
Log (#4)
Front
Log (#1)
Figure 24 - Installing Crossover Log #5
and Log #6 (CCL3018PTA/NTA Only)
Crossover
Log (#5)
Middle
Log (#2)
Crossover
Log (#6)

www.desatech.com 113097-01L18
INSTALLATION
Continued
Single Burner Seasonal Oak Models
CRL2718PA/NA, CRL3124PA/NA
WARNING: Failure to posi-
tion the parts in accordance
with these diagrams or failure
to use only parts specically
approved with this heater may
result in property damage or
personal injury.
The Seasonal Oak Log Set is a reversible log
set. This means that the 2 bottom logs may be
turned to face either direction. The top logs,
however, must remain in the same position.
Do not modify logs. Only use logs supplied
with heater.
1. Place back log onto back of base assembly.
Make sure log sits forward against 2 posts
in front of log (see Figure 26). This log may
be turned to face either direction.
2. Place front log onto grate on front of base
assembly. The log will t down between
grate ngers and posts on front of base
assembly (see Figure 27). This log may
be turned to face either direction.
3. Place left and right crossover logs on top of
back log and front log. Make sure pins on
front and back are inserted into holes on
crossover logs (see Figure 28). Crossover
logs must be placed as shown in Figure 28
or holes will not seat onto pins.
4. Add lava rock around base of heater if
desired. Do not put lava rock on logs or
burner.
Figure 26 - Installing Back Log
Figure 27 - Installing Front Log
Front Log
Grate
Fingers
Figure 28 - Installing Left and Right
Crossover Logs
Back Log
Post
Post
Post
Base
Assembly
Post
Base
Assembly
Left Crossover Log Right
Crossover Log
6
Figure 25 - Installing Crossover Log #6
(CCL3924PTA/NTA Shown)
Pins
Middle
Log (#2)Front
Log (#1)
Crossover
Log (#6)

www.desatech.com
113097-01L 19
OPERATION
MANUALLy-CONTROLLED MODELS
LIGHTING
INSTRUCTIONS
WARNING
• If replace has glass doors,
never operate this heater with
glass doors closed. If you op-
erate heater with doors closed,
heat buildup inside replace
will cause glass to burst. Make
sure there are no obstructions
across openings of replace.
• You must operate this heater
with a fireplace screen in
place. Make sure fireplace
screen is closed before run-
ning heater.
NOTICE: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Orange ame will also be pres-
ent. Open damper or window to
vent smell. This will only last a
few hours.
Note: Home owners generally prefer to oper-
ate their heater with the chimney damper
closed. This will put all the heat into the room.
However, there may be times you will desire
the full ames of the HI heat setting but will
nd the heat output excessive. You can open
the chimney damper (if you have one) fully or
partially to release some of the heat.
WARNING: Damper handle
will be hot if heater has been
running.
1. STOP! Read the safety information in
column 1.
2. Make sure equipment shutoff valve is fully
open.
3. Press in and turn control knob clockwise
to the OFF position.
4. Wait ve (5) minutes to clear out any gas.
Then smell for gas, including near the
oor. If you smell gas, STOP! Follow “B”
in the safety information, column 1. If you
don’t smell gas, go to the next step.
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a re or explosion may result
causing property damage, per-
sonal injury or loss of life.
A. This appliance has a pilot which must
be lighted by hand. When lighting
the pilot, follow these instructions
exactly.
B. BEFORE LIGHTING smell all around
the appliance area for gas. Be sure to
smell next to the oor because some
gas is heavier than air and will settle
on the oor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas supplier,
call the re department.
C. Use only your hand to push in or turn
the gas control knob. Never use tools.
If the knob will not push in or turn by
hand, don’t try to repair it, call a quali-
ed service technician or gas supplier.
Force or attempted repair may result in
a re or explosion.
D. Do not use this appliance if any part
has been under water. Immediately call
a qualied service technician to inspect
the appliance and to replace any part of
the control system and any gas control
which has been under water.

www.desatech.com 113097-01L20
5. Slightly press and turn control knob coun-
terclockwise to the PILOT position.
Press in control knob for ve (5) seconds
(see Figure 29).
Note: You may be running this heater
for the rst time after hooking up to gas
supply. If so, the control knob may need
to be pressed in for 30 seconds or more.
This will allow air to bleed from the gas
system.
6. With control knob pressed in, press and
release ignitor button. This will light pilot.
The pilot is attached to the burner. If
needed, keep pressing ignitor button until
pilot lights.
Note: If pilot does not stay lit, contact a
qualied service person or gas supplier
for repairs. Until repairs are made, light
pilot with match. To light pilot with match,
see Manual Lighting Procedure.
7. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob.
Note: If pilot goes out, repeat steps 3
through 7. If control knob does not pop out
when released, contact a qualied service
person or gas supplier for repairs.
8. Slightly depress and turn control knob
counterclockwise to desired heat-
ing level. The burner(s) should light. Set
control knob to any heat level between HI
and LO.
9. To leave pilot lit and shut off burners only,
turn control knob clockwise to the
HI position then press in and turn clock-
wise to PILOT position.
WARNING: Do not operate
heater between PILOT and HI
positions.
OPERATION
Continued
MANUALLy-CONTROLLED MODELS
Figure 29 - Control Knob and Ignitor
Button Location
Ignitor Button Control Knob
Figure 30 - Pilot
Thermocouple
Pilot Burner
Ignitor
Electrode
VARIABLE CONTROL
OPERATION
The variable control valve can be set to any
heat setting and ame height desired, by sim-
ply turning the control knob until that setting
is attained. Even the lowest setting provides
realistic, dancing yellow ames. Selecting
higher settings produces greater heat output.
This results in increased heating comfort.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
1. Press in and turn control knob clockwise
to the HI position.
2. Turn control knob clockwise to the
pilot position.
3. Press in control knob and turn clockwise
to the OFF position.
4. Close equipment shutoff valve (see Figure
16, page 15).
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Lighting
Instructions, pages 19 and 20.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob. Now follow step 8,
under Lighting Instructions, column 1.