Desa CFFP18NT Quick start guide
For more information, visit www.desatech.com
WARNING: If the information in this manual is not
— WHAT TO DO IF YOU SMELL GAS
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ALL-IN-ONE UNVENTED (VENT-FREE) GAS FIREPLACE SYSTEM
OWNER’S OPERATION AND INSTALLATION MANUAL
MODELS CFFP18NT AND CFFP18PT
www.desatech.com 123779-01C2
SAFETY
alteration, service or
maintenance can cause
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for correct installation
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additional information
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WARNING: This is an
-
from the room in which
and ventilation air must
Air
for Combustion and Ven-
tilation
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stalled in an aftermarket,*
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chemicals known to the State
of California to cause cancer or
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TABLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 4
Unpacking............................................................ 5
Product Identication........................................... 5
Product Features................................................. 5
Assembly............................................................. 6
Air for Combustion and Ventilation ...................... 7
Installation ........................................................... 9
Operation........................................................... 16
Inspecting Burners............................................. 17
Cleaning ............................................................ 18
Troubleshooting................................................. 19
Specications .................................................... 23
Service Hints ..................................................... 23
Technical Service............................................... 23
Replacement Parts............................................ 23
Parts .................................................................. 24
Accessories ....................................................... 27
Warranty ..............................................Back Cover
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123779-01C 3
Early signs of
carbon monoxide poisoning resemble the u,
with headaches, dizziness or nausea. If you
have these signs, the replace may not be
working properly. Get fresh air at once! Have
replace 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 inu-
ence of alcohol and those at high altitudes.
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 replace.
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WARNING: Do not allow fans
SAFETY
Continued
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away from hot surfaces to avoid
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dren when they are in the room
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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.
3. 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
supplier’s instructions
• if you cannot reach your gas supplier,
call the re department
4. This replace shall not be installed in a
bathroom.
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SAFETY
Continued
11. Keep all air openings in front and at bottom
of heater clear and free of debris. This will
insure enough air for proper combustion.
12. Do not run replace
• where ammable liquids or vapors are
used or stored.
• under dusty conditions.
13. Do not use this replace to cook food or
burn paper or other objects.
14. Never place any objects in the replace
or on logs.
15. Do not use replace if any part has been
under water. Immediately call a qualied
service technician to inspect the room
replace and to replace any part of the
control system and any gas control which
has been under water.
16. Turn off fireplace and let cool before
servicing. Only a qualied service person
should service and repair replace.
17. Operating replace above elevations of
4,500 feet could cause pilot outage.
18. Do not operate fireplace if any log is
broken. Do not operate replace if a log
is chipped (dime-sized or larger).
19. To prevent performance problems, do not
use propane/LP fuel tank of less than 100
lbs. capacity.
20. Provide adequate clearances around air
openings.
5. Do not use this replace as a wood-burn-
ing replace. Use only the logs provided
with the replace.
6. Do not add extra logs or ornaments such
as pine cones, vermiculite or rock wool.
Using these added items can cause soot-
ing. Do not add lava rock around base.
Rock and debris could fall into the control
area of replace.
7. This replace is designed to be smokeless.
If logs ever appear to smoke, turn off re-
place and call a qualied service person.
Note: During initial operation, slight smok-
ing could occur due to log curing and re-
place burning manufacturing residues.
8. To prevent the creation of soot, follow the
instructions in Cleaning, page 18.
9. Before using furniture polish, wax, carpet
cleaner or similar products, turn replace
off. If heated, the vapors from these prod-
ucts may create a white powder residue
within burner box or on adjacent walls or
furniture.
10. This replace needs fresh air ventilation to
run properly. This replace has an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS shuts down the re-
place if not enough fresh air is available.
See Air for Combustion and Ventilation,
page 7. If replace keeps shutting off, see
Troubleshooting, page 19.
LOCAL CODES
Install and use replace 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
State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Mas-
sachusetts.
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.
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123779-01C 5
PRODUCT IDENTIFICATION
Screen
Control Knob and
Piezo Ignitor Behind
Access Door
Log
Figure 1 - All-In-One Fireplace (Mantel Not Shown)
PRODUCT FEATURES
Brick Liners
ALL-IN-ONE ASSEMBLY
This all-in-one assembly comes with the
replace already installed in the mantel for
easy installation.
UNPACKING
CAUTION: Do not remove
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1. Remove replace and mantel from carton.
Log is wrapped and inside replace. Do
not remove at this time.
2. Remove all protective packaging applied
to replace for shipment.
3. Make sure replace includes one hard-
ware packet.
4. Check replace for any shipping damage.
If replace is damaged call DESA Heat-
ing, LLC at 1-866-672-6040 for replace-
ment parts before returning to dealer.
5. Remove hood from shipping location
inside back of mantel. Discard screws.
This replace has a pilot with an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS/pilot is a required feature
for vent-free room replaces. The ODS/pilot
shuts off the replace if there is not enough
fresh air.
Gas Line
Access Hole
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WARNING: Always have
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Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
• scissors
1. Remove two screws that hold replace
screen in place for shipping. These
screws are located near top of screen.
Discard screws. Lift replace screen up
and pull out to remove (see Figure 2). Set
screen aside until installation has been
completed.
Screen
Shoulder
Screw
Figure 2 - Removing and Replacing
Screen (Mantel Not Shown)
ASSEMBLY
2. Remove all packaging from inside of
unit.
3. Remove bubble wrap from logs and dis-
card.
4. Check installation of brick liners. Brick
liners are in 4 pieces: 2 sides, 1 back and
1 top.
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123779-01C 7
AIR FOR COMBUSTION AND VENTILATION
WARNING: This heater shall
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National Fuel Gas
Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code, or
Today’s homes are built more energy efcient
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
efcient, 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 appli-
ances.
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 classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 7 through 9 will help
you classify your space and provide adequate
ventilation.
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.
construction where:
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2
and
and
If your home meets all of these three cri-
Ventilation Air From Outdoors,
If your home does not meet all of the three
Determining
Fresh-Air Flow For Fireplace Location,
The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 denes a conned space as a space
whose volume is less than 50 ft3 per 1,000
Btu/hr (4.8 m3/kw) of the aggregate input
rating of all appliances installed in that space
and an unconned space as a space whose
volume is not less than 50 ft3 per 1,000 Btu/hr
(4.8 m3/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 consid-
ered a part of the unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
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AIR FOR COMBUSTION AND VENTILATION
Continued
Example: 35,840 Btu/Hr (maximum the
space can support)
40,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a conned 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 unconned space, remove door to adjoin-
ing 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 9.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional
fresh air ventilation.
WARNING:If the areainwhich
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National Fuel
Gas Code,ANSI Z223.1/NFPA54,
the International Fuel Gas Code,
This fresh air would come from an adjoining
unconned space. When ventilating to an
adjoining unconned 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 3 on page 9). You can also
remove door into adjoining room (see option
3, Figure 3 on page 9). Follow the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, Air
for Combustion and Ventilation for required
size of ventilation grills or ducts.
30,000
10,000
40,000
DETERMINING FRESH-AIR FLOW
Use this work sheet to determine if you have
a conned or unconned space.
Includes the room in which you will
install replace plus any adjoining rooms with
doorless 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)
Example: Space size 16 ft. (length) x 14 ft.
(width) x 8 ft. (ceiling height) = 1792 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: 1792 cu. ft. (volume of space) x 20
= 35,840 (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 of Btu/Hr
used)
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123779-01C 9
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
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 3 - Ventilation Air from Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option 3
V e ntilation Grills
Into Adjoining Room,
Option 2
12"
12"
V e ntilation
Grills
into
Adjoining
Room,
Option 1
Figure 4 - Ventilation Air from Outdoors
Outlet
Air
V e ntilated
Attic
Outlet
Air
Inlet
Air
Inlet Air V e ntilated
Crawl Space
T o
Crawl
Space
T o Attic
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air 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-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
INSTALLATION
NOTICE: This heater is intended
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WARNING: Never install the
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INSTALLATION ITEMS
Before installing replace, make sure you
have the items listed below.
• external regulator (supplied by installer, for
propane/LP units only)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection*
• ground joint union
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
optional CSA design-certified equipment
shutoff valve from your dealer.
WARNING: Maintain the
minimum clearances shown in
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CAUTION: If you install the
For convenience and efciency, install re-
place
• where there is easy access for operation,
inspection and service
• in coldest part of room
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currents move heat to wall sur-
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intheairexist,maydiscolorwalls
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IMPORTANT: Vent-free replaces add mois-
ture to the air. Although this is benecial,
installing replace in rooms without enough
ventilation air may cause mildew to form from
too much moisture. See Air for Combustion
and Ventilation, page 7.
Note: Your replace is designed to be used in
zero clearance installations. Wall or framing
material can be placed directly against any
exterior surface on rear, sides or top of your
replace.
Use correct gas type (natural or propane/LP)
for your unit. If your gas supply is not correct,
do not install replace. Call dealer where you
bought replace for proper type replace.
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INSTALLATION
Continued
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123779-01C 11
INSTALLATION
Continued
A. Clearances from the side of the replace
cabinet to any combustible material and
wall should follow diagram in Figure 5.
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 the side
of the replace opening (see Figure 5).
B.
Clearances from the top of the replace
opening to the ceiling should not be less
than 36".
C. For mantel clearances, see Figure 8 on
page 13.
WARNING: Do not allow any
WARNING: Do not allow non-
WARNING: Never modify or
cover the louvered slots on the
Figure 5 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
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Follow all minimum clearances
Follow these instructions for system installa-
tion. Refer to instructions on page 6 for hood
assembly.
1. Mantel must be installed ush with wall.
Base board must be altered or removed
for mantel installation.
2. Place hearth base against wall at instal-
lation location. Cut an access hole in
hearth base to run gas line to replace
(see Figure 6). Make sure to locate access
hole to inside of mantel.
Note: You can secure base to oor using
wood screws. Countersink screw heads
and putty over.
3. Route exible gas line through access
hole in hearth base.
Figure 6 - Locating Gas Shutoff Valve
Hearth
Base
Pipe
and
Gas
Shutoff
Valve
MINIMUM CLEARANCE TO
COMBUSTIBLE MATERIALS
Top 36", Left and Right Sides 6", Bottom
and Rear 0", Front 36"
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INSTALLATION
Continued
Propane/
LP Supply
Tank
Figure 7 - External Regulator With Vent
Pointing Down
External
Regulator
with Vent
Pointing
Down
CAUTION: Use only new,
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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 8, page 13).
IMPORTANT: Install equipment shutoff valve
in an accessible location. Equipment shutoff
valve is for turning on or shutting off 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 replace valves.
4. Attach exible gas line to replace gas
regulator. See Connecting to Gas Supply.
5. Check all gas connections for leaks. See
Checking Gas Connections, page 14.
WARNING: Never connect
IMPORTANT: For natural gas, check gas line
pressure before connecting replace to gas
line. Gas line pressure must be no greater
than 14" of water. If gas line pressure is higher,
heater regulator damage could occur.
CAUTION: Never connect
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For propane/LP units, installer must supply
an external regulator. External regulator will
reduce incoming gas pressure. You must
reduce incoming gas pressure to between
11" and 14" of water. If you do not reduce
incoming gas pressure, replace regulator
damage could occur. Install external regulator
with vent pointing down as shown in Figure 7.
Pointing the vent down protects it from freez-
ing rain or sleet.
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123779-01C 13
INSTALLATION
Continued
We recommend that you install a sediment
trap in supply line as shown in Figure 8.
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
contaminants. This keeps them from going
into replace controls. If sediment trap is not
installed or is installed wrong, replace may
not run properly.
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer.
Figure 8 - Gas Connection
CSA Design-
Certied Equipment
Shutoff Valve With
1/8" NPT Tap*
3" Minimum
Approved
Flexible Gas
Line
Pipe Nipple Cap Tee Joint
From External
Regulator (11"
W.C.** to 14"
W.C. Pressure)
NATURAL
From Gas
Meter (5"
W.C.** to 10.5"
W.C. Pressure)
Sediment Trap
Figure 9 - Attaching Flexible Gas Line to
Equipment Shutoff Valve
Flexible Gas Line
from Fireplace Gas
Regulator Provided
With Fireplace
To Gas
Regulator Equipment
Shutoff Valve
To External
Regulator
NATURAL
To Gas Supply
Installation Items Needed
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not
provided)
1. Route exible gas line, included, from
fireplace control to equipment shutoff
valve through side or rear access holes
in outer casing (see Figure 1, page 5).
2. Apply pipe joint sealant lightly to male
threads of gas connector attached to
exible gas line/equipment shutoff valve
(see Figure 9).
3. Check all gas connections for leaks. See
Checking Gas Connections, page 14.
4. Feed exible gas line into replace base
area while replacing branch support.
Make sure entire exible gas line is in
replace base area.
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INSTALLATION
Continued
and connections, internal and
external to unit, for leaks after
a noncorrosive leak detection
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CAUTION: Make sure exter-
Connecting to Gas Supply,
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 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.
4. Check all joints of gas supply piping sys-
tem. Apply noncorrosive leak detection
uid to all joints. Bubbles forming show a
leak.
5. Correct all leaks at once.
6. Reconnect fireplace and equipment
shutoff valve to gas supply. Check recon-
nected ttings for leaks.
1. Close equipment shutoff valve (see Fig-
ure 10).
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 11 or
Figure 12, page 15). Apply noncorrosive
leak detection uid to all joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
Figure 10 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff Valve
Figure 11 - Checking Gas Joints
(Propane/LP Only) (actual replace may
vary from illustration)
Propane/LP
Supply Tank
Equipment
Shutoff Valve
Gas Valve
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123779-01C 15
Equipment
Shutoff Valve
Gas
Meter
Figure 12 - Checking Gas Joints (Natural
Gas Only) (actual replace may vary
from illustration)
Gas Regulator
INSTALLATION
Continued
CONNECTIONS
1. Open equipment shutoff valve (see Figure
10, page 14).
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 replace is in
the OFF position.
4. Check all joints from equipment shutoff
valve to gas regulator (see Figure 11,
page 14 or Figure 12). Apply noncorrosive
leak detection uid to all joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Light replace (see Operation, page 16).
Check all other internal joints for leaks.
7. Turn off replace (see To Turn Off Gas to
Appliance, page 17.
Log
Shoulder Screw
Screen
Figure 13 - Installing Log and Screen
(Mantel Not Shown)
INSTALLING LOG SET AND SCREEN
1. Remove log packaging material and
discard packaging. Gently place log over
the burner (see Figure 13). Do not allow
log to contact ame. If ame contacts log,
soot will be created.
2. Reattach screen by placing the notches
in the screen frame over the shoulder
screws and pushing down.
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OPERATION
OFF
PILOT
ON
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
-
WHAT TO DO IF YOU SMELL GAS
-
LIGHTING
INSTRUCTIONS
-
Figure 14 - Control Knob In the OFF
Position
Piezo Ignitor
Control Knob
-
-
1.
STOP! Read safety information, column 1.
2. Make sure equipment shutoff valve is fully
open.
3. 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.
5. Turn control knob counterclockwise
to PILOT position. Press in control
knob for ve (5) seconds (see Figure 14).
Note: You may be running this replace
for the rst time after hooking up to gas
supply. If so, control knob may need to be
pressed in for 30 seconds or more. This
will allow air to bleed from gas system.
• If control knob does not pop out when
released, contact a qualified service
person or gas supplier for repairs.
6. With control knob pressed in, press and
release ignitor button (see Figure 14). This
will light pilot. Pilot is attached in front of
burner. If needed, keep pressing ignitor
button until pilot lights.
Note: If pilot does not stay lit, refer to
Troubleshooting, page 19. Also, contact a
qualied service person or gas supplier for
repairs. Until repairs are made, light pilot
with match. To light pilot with match, see
Manual Lighting Procedure on page 17.
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123779-01C 17
OPERATION
Continued
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. This replace has a safety
interlock system. Wait one (1) minute
for system to reset before lighting pilot
again.
8. Turn control knob counterclockwise
to ON position. The burner should
light.
CAUTION: Do not try to ad-
Figure 15 - Pilot
Thermocouple Ignitor Electrode
Pilot Burner
9. To leave pilot lit and shut off burners only,
turn control knob clockwise to the
PILOT position.
TO TURN OFF GAS
1. Turn control knob clockwise to the
OFF position.
2. Close equipment shutoff valve (see Figure
10, page 14)
MANUAL LIGHTING
1. Follow steps 1 through 5 under Lighting
Instructions, page 16.
2. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
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, page 16.
INSPECTING BURNERS
Check pilot ame pattern and burner ame
patterns often.
Figure 16 shows a correct pilot ame pattern.
Figure 17 shows an incorrect pilot ame pat-
tern. The incorrect pilot ame is not touching
the thermocouple. This will cause the thermo-
couple to cool. When the thermocouple cools,
the replace will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 17
• turn replace off (see To Turn Off Gas to
Appliance)
• see Troubleshooting, page 19
Note: The correct pilot ame on natural gas
units will have a slight curve, but ame should
be blue and have no yellow or orange color.
Figure 16 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 17 - Incorrect Pilot Flame Pattern
Pilot Burner
Thermocouple
www.desatech.com 123779-01C18
INSPECTING BURNERS
Continued
Figure 18 shows a correct burner ame pat-
tern. Figure 19 shows an incorrect burner
ame pattern. The incorrect burner ame
pattern shows sporadic, irregular ame tip-
ping. The ame should not be dark or have
an orange/reddish tinge.
Note: When using the replace the rst time,
the ame will be orange for approximately one
hour until the log cures.
If burner ame pattern is incorrect, as shown
in Figure 21
• turn replace off (see To Turn Off Gas to
Appliance, page 17)
• see Troubleshooting, page 19
Figure 18 - Correct Burner Flame Pattern
Figure 19 - Incorrect Burner Flame Pattern
CLEANING
We also recommend that you keep the burner
tube and pilot assembly clean and free of dust
and dirt. To clean these parts we recommend
using compressed air no greater than 30 PSI.
Your local computer store, hardware store or
home center may carry compressed air in a
can. If using compressed air in a can, please
follow the directions on the can. If you don’t
follow directions on the can, you could dam-
age the pilot assembly.
1. Shut off unit, including pilot. Allow unit to
cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet
holes on injector holder for dust and dirt
(see Figure 20).
3. Blow air through the ports/slots and holes
in the burner.
4. Check injector holder located at the end of
the burner tube again. Remove any large
particles of dust, dirt, lint or pet hair with
a soft cloth or vacuum cleaner nozzle.
-
BURNER INjECTOR HOLDER AND
The primary air inlet holes allow the proper
amount of air to mix with the gas. This pro-
vides a clean burning ame. Keep these holes
clear of dust, dirt, lint and pet hair. Clean these
air inlet holes prior to each heating season.
Blocked air holes will create soot. We rec-
ommend that you clean the unit every three
months during operation, or as needed, and
have replace inspected yearly by a qualied
service person.
Figure 20 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Injector
Holder
Primary
Air Inlet
Holes
Ports/Slots
www.desatech.com
123779-01C 19
5. Blow air into the primary air holes on the
injector holder.
6. In case any large clumps of dust have now
been pushed into the burner repeat steps
3 and 4.
Clean the pilot assembly also. Additional
cleaning may be needed for proper pilot
operation based on use/lack of use. A yellow
tip on the pilot ame may indicate dust and
dirt in the pilot assembly. There is a small
Pilot Assembly
Pilot Air
Inlet Hole
Figure 21 - Pilot Inlet Air Hole
CLEANING
Continued
TROUBLESHOOTING
Note: All troubleshooting items are listed in order of operation.
1. Ignitor electrode not con-
nected to ignitor cable
2. Ignitor cable pinched or
wet
3. Broken ignitor cable
4. Bad ignitor
5. Ignitor electrode posi-
tioned wrong
6. Ignitor electrode broken
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched
by any metal or tubing.
Keep ignitor cable dry
3. Replace ignitor cable
4. Replace ignitor
5. Replace pilot assembly
6. Replace pilot assembly
When ignitor button is pressed,
there is no spark at ODS/pi-
lot
pilot air inlet hole about 2" from where the
pilot ame comes out of the pilot assembly
(see Figure 21). With the unit off, lightly blow
air through the air inlet hole. You may blow
through a drinking straw if compressed air is
not available.
LOG SET
• If you remove one-piece log set for clean-
ing, refer to Installing Log Set and Screen,
page 15, for placement instructions.
• Replace log set if broken or chipped (dime-
sized or larger).
CABINET
Use pressurized air to clean.
Exterior
Use a soft cloth dampened with a mild soap
and water mixture. Wipe the cabinet to re-
move dust.
www.desatech.com 123779-01C20
TROUBLESHOOTING
Continued
When ignitor button is pressed,
there is spark at ODS/pilot but
no ignition
ODS/pilot lights but flame
goes out when control knob
is released
Burner does not light after
ODS/pilot is lit
1. Gas supply turned off or
equipment shutoff valve
closed
2. Control knob not in PILOT
position
3. Control knob not pressed
in while in PILOT position
4. Air in gas lines when in-
stalled
5. Depleted gas supply (pro-
pane/LP only)
6. ODS/pilot is clogged
7. Gas regulator setting is not
correct
1. Control knob not fully
pressed in
2. Control knob not pressed
in long enough
3. Equipment shutoff valve
not fully open
4. Pilot flame not touching
thermocouple, which al-
lows thermocouple to cool,
causing pilot ame to go
out. This problem could
be caused by one or both
of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
5. Thermocouple connection
loose at control valve
6. Thermocouple damaged
7. Control valve damaged
1. Inlet gas pressure is too
low
2. Burner orice is clogged
REMEDY
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while
in PILOT position
4. Continue holding down
control knob. Repeat ignit-
ing operation until air is
removed
5. Contact local propane/LP
gas company
6. Clean ODS/pilot (see
Cleaning, page 18) or re-
place ODS/pilot assembly
7. Replace gas regulator
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Fully open equipment shut-
off valve
4. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning, page 18) or re-
place ODS/pilot assembly
5. Hand tighten until snug,
then tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
1. Contact local natural or
propane/LP gas company
2. Clean burner (see Clean-
ing, page 18) or replace
burner orice
This manual suits for next models
1
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