Comfort Glow CSBNT Quick start guide

UNVENTED (VENT-FREE) GAS STOVE HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
MODELS CSBNT AND CSBPT
Propane/LP and Natural Gas Thermostat Control Gas Log Heaters
(Burner System For Cast Iron Stoves)
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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WARNING: Improper installation, adjustment, al-
teration, service or maintenance can cause injury or
property damage. Refer to this manual for correct in-
stallation and operational procedures. For assistance
or additional information consult a qualied installer,
service agency or the gas supplier.
WARNING: This is an unvented gas-red heater. 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
Ventilation section on page 5 of this manual.
This appliance may be installed in an aftermarket,* per-
manently located, manufactured (mobile) home, where
not prohibited by local codes.
This appliance is only for use with the type of gas indi-
cated on the rating plate. This appliance is not convert-
ible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
TABLE OF CONTENTS
Safety .................................................................. 3
Product Identication........................................... 4
Local Codes......................................................... 5
Product Features................................................. 5
Air for Combustion and Ventilation ...................... 5
Unpacking............................................................ 8
Installation ........................................................... 8
Operation........................................................... 14
Inspecting Burners............................................. 15
Cleaning and Maintenance................................ 16
Troubleshooting................................................. 17
Specications .................................................... 21
Replacement Parts............................................ 21
Service Hints ..................................................... 21
Technical Service............................................... 21
Accessories ....................................................... 21
Parts .................................................................. 22
Parts Central...................................................... 25
Warranty ............................................................ 26

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111487-01G 3
SAFETy
WARNING: Do not allow fans
to blow directly into the stove.
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
insertorother 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.
Stove becomes very hot when
running heater. Keep children
andadultsawayfromhotsurface
to avoid burns or clothing igni-
tion. Heater will remain hot for a
time after shutdown. Allow sur-
face to cool before touching.
Carefully supervise young chil-
dren when they are in the room
with heater.
Keep the appliance area clear
and free from combustible ma-
terials, gasoline and other am-
mable vapors and liquids.
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.
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
manualcarefullyandcompletely
before trying to assemble, op-
erate or service this replace.
Improper use of this replace
can cause serious injury or
death from burns, re, explo-
sion, 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 affected by carbon monoxide than oth-
ers. These include pregnant women, people
with heart or lung disease or anemia, those
under the inuence 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.

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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 heater shall not be installed in a
bedroom or bathroom.
5. Do not place stove directly on carpeting,
vinyl tile or any combustible material other
than wood. The stove must set on a metal
or wood panel extending the full width and
depth of the appliance.
6. Do not use this stove as a wood burning
fireplace. Use only model 111485-02/
111485-01 vent-free gas log heater.
7. Do not add extra logs or ornaments such as
pine cones, vermiculite or rock wool. Using
these added items can cause sooting.
8. 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.
9. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 16.
10. Before using furniture polish, wax, carpet
cleaners 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.
SAFETy
Continued
11. 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 5. If heater keeps shutting off, see
Troubleshooting, page 17.
12. Do not run heater
• where ammable liquids or vapors are
used or stored
• when under dusty conditions
13. Do not use this stove to cook food or burn
paper or other objects.
14. 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.
15. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped
(dime-sized or larger).
16. Turn heater off and let cool before servic-
ing. Only a qualied service person should
service and repair heater.
17. Operating heater above elevations of
4,500 feet could cause pilot outage.
18. For propane/LP units, do not use propane/
LP tank of less than 100 lb. capacity.
19. Provide adequate clearances around air
openings.
20. Screen must be completely closed before
using heater. Never run heater with screen
open.
PRODUCT IDENTIFICATION
Figure 1 - Typical Stove Cabinet Model with Comfort Glow Gas Log Heater
Stove Body
Stove Door (Shown
in the open position)
Piezo Ignitor
Control Knob
One Piece Log Set
Inside Stove Cavity
Screen

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111487-01G 5
LOCAL CODES
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/NFPA 54, the International
Fuel Gas Code, or applicable
local codes. Read the following
instructionstoinsureproperfresh
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-
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
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.
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. State and
local codes in some areas prohibit the use of
vent-free heaters.
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.
AIR FOR COMBUSTION AND VENTILATION
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 5 through 7 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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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 (6 x 10-11 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 plumb-
ing, 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 7.
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
The 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 m3per 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 m3per kw) of the ag-
gregate 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 un-
con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 heater plus any adjoining rooms with
doorless passageways or ventilation grills
between the rooms.
AIR FOR COMBUSTION AND VENTILATION
Continued
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 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 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 deter-
mine the maximum Btu/Hr the space can
support.
(volume of space) x 20 = (maximum Btu/
Hr the space can support)
Example: 2560 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 appli-
ances in the space.
Vent-free heater _______ 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 heater + ______ 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)
Example: 51,200 Btu/Hr (maximum the
space can support)
70,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a conned
space because the actual Btu/Hr used is more
than the maximum Btu/Hr the space can sup-
port. You must provide additional fresh air.
40,000
30,000
70,000

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111487-01G 7
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.
C. Install a lower Btu/Hr heater, if lower
Btu/Hr size makes room unconned.
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support, the
space is an unconned space. You will need
no additional fresh air ventilation.
WARNING:Iftheareainwhich
the heater may be operated does
notmeettherequiredvolumefor
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/NFPA 54,
theInternational 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
Figure 2 - Ventilation Air from Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills Into
Adjoining
Room,
Option 1
12"
12"
Figure 3 - 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
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, 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.

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INSTALLATION
UNPACkING
Figure 4 - Unpacking Stove from Wooden
Shipping Enclosure
Back
Panel
Screws
STOVE BACK
STOVE TOP
Top of Wood
Frame Enclosure
Back of Wood Frame Enclosure
Back
Panel
Screws
1. Lift off corrugated box enclosing stove
body crating.
2. Remove screws fastening back and top
of wood frame enclosure. Two or more
people must carefully lift stove up and out
of wooden crate.
3. Remove plastic bag from stove body.
4. Remove back panel from stove (see Fig-
ure 4). Use an adjustable wrench or a 10
mm socket. Remove 4 bolts and washers.
Keep bolts and washers to reattach back
panel later.
5. Remove bubble-wrapped log set, rod and
screen from stove. Remove all protective
packaging applied for shipment.
6. 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. Some
ber akes may fall from logs. This is ac-
ceptable.
7. Place freestanding stove near desired
location in room.
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
centralheatingsystem,youmay
run system’s circulating blower
whileusingheater. This will help
circulatetheheatthroughoutthe
house. 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.
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing or other ammable
objects are less than 42 inches
from the front, top or sides of
the heater
• in high trafc areas
• in windy or drafty areas
CAUTION:Thisheater creates
warmaircurrents.Thesecurrents
move heat to wall surfaces next
to heater. Installing heater next
to vinyl or cloth wall coverings or
operatingheaterwhereimpurities
(such as, but not limited to, to-
bacco smoke, aromatic candles,
cleaning uids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls or cause odors.

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111487-01G 9
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 5.
CHECK GAS TYPE
Use the correct gas type (natural or propane/
LP) for your unit. If your stove heater gas type
is different from your house gas type, 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-
ingplate.Fieldconversionis not
permitted.
CLEARANCES TO COMBUSTIBLES
(Vent-Free Operation Only)
WARNING: Maintain the
minimumclearances.If you can,
providegreater clearancesfrom
oor, ceiling and adjoining side
and back walls.
Carefully follow the instructions below. This
stove is a freestanding unit designed to set
directly on the oor. DO NOT place stove
directly on carpeting, vinyl tile or any combus-
tible material other than wood. The stove must
be set on a metal or wood panel extending
the full width and depth of the stove for these
oor coverings. Important: You must maintain
minimum wall and ceiling clearances during
installation. The minimum clearances are
shown in Figure 5. Measure from outermost
point of stove top.
Minimum Wall and Ceiling Clearances
(see Figure 5)
A. Clearances from outermost point of stove
top to any combustible side wall should
not be less than 12".
B. Clearances from outermost point of stove
top to any combustible back wall should
not be less than 6" (includes corner instal-
lations).
INSTALLATION
Continued
C. Clearances from the stove top to the ceil-
ing should not be less than 48".
Figure 5 - Minimum Clearance to Walls
and Ceiling (Stove May Vary Depending
on Model)
Front View
Top View
Side View
12"
Minimum 12" Minimum
48"
Minimum
Ceiling
Side Wall Side Wall
Back Wall
Side Wall Side Wall
12 "
Minimum 12 " Minimum
6 "
Minimum
6"
Minimum
48"
Minimum
Ceiling
Floor
Back Wall
Corner
Wall
Wall
6 "
Minimum
6 "
Minimum
Front of Stove Unit
Front of Stove
Unit
Front of
Stove Unit

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INSTALLATION
Continued
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-
vicepersonmustconnectheater
to gas supply. Follow all local
codes.
CAUTION: Never connect
propane/LPheaterdirectlytothe
propane/LP supply. This heater
requires an external regulator
(not supplied). Install the exter-
nal regulator between the heater
and propane/LP supply.
WARNING: Never connect
natural gas heater 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 [propane/LP only] (sup-
plied by installer)
• piping to stove location (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.
The gas inlet connection for the stove heater
is located on the lower right-hand side of
the stove when viewed from the front of the
unit. The gas connection can be made either
through the bottom right side or through the
lower back opening as illustrated in Figure 6.
Make sure gas log heater is secured to the
stove cavity assembly.
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 reduce incom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure 7.
Pointing the vent down protects it from freez-
ing rain or sleet.
CAUTION: For propane/LP
units, use only new, black iron
or steel pipe. 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
volume to heater. If pipe is too
small, undue loss of volume
will occur.
Figure 6 - Gas Regulator Location and
Gas Line Access Into Stove Cabinet
Back
Stove
Panel
Front
of
Stove
Unit
Gas Inlet
Connection
Access
Product
Identication
Label
Gas Log
Heater
Back ViewSide View
Figure 7 - External Regulator For
Propane/LP Gas With Vent Pointing Down
Propane/LP
Supply Tank
External
Regulator
with Vent
Pointing
Down

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111487-01G 11
INSTALLATION
Continued
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).
IMPORTANT: Install equipment shutoff 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 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 heater controls. If sediment trap is not
installed or is installed wrong, heater may
not run properly.
Figure 8 - Gas Connection
3"
Minimum
Sediment Trap
Gas
Regulator
(Propane/LP)
From
External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
CSA Design-Certied
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved
Flexible Gas
Hose (if allowed
by local codes)
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer.
** Minimum inlet pressure for purpose of input
adjustment.
Tee Pipe Cap
Joint Nipple
CAUTION: Avoid damage to
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or ttings.
CHECKING GAS CONNECTIONS
WARNING:Testallgaspiping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open ame to check for a leak.
Apply a noncorrosive leak detec-
tion uid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
propane/LP heater. See guide-
lines under Connecting to Gas
Supply, page 10.
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 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 gas joints. Bubbles forming show
a leak.

www.desatech.com 111487-01G12
INSTALLATION
Continued
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 9).
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 for natu-
ral or propane/LP supply to equipment
Figure 9 - Equipment Shutoff Valve
Closed
Equipment
Shutoff Valve Open
shutoff valve (see Figure 10 or Figure 11).
Apply noncorrosive leak detection uid to
gas 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 9).
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 control valve (see Figure 10 or
Figure 11). Apply noncorrosive leak detec-
tion uid to gas joints. Bubbles forming
show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 14).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 15).
INSTALLING ROD AND SCREEN
1. Insert rod through small rings located at
top of screen (see Figure 12).
2. From back of stove, insert rod into hole
located inside right front of stove as shown
in Figure 13, page 13.
3. Slip left side of rod down into slot on
inside left front of stove (see Figure 13,
page 13).
Figure 10 - Checking Gas Joints on
Propane/LP Gas Unit
Control Valve
Location
Propane/LP
Supply Tank
Equipment
Shutoff Valve
Figure 11 - Checking Gas Joints on
Natural Gas Unit
Gas Meter
Equipment
Shutoff Valve
Control Valve
Location
Figure 12 - Assembling Rod and Screen
Rod
Rings

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111487-01G 13
INSTALLATION
Continued
Slot on Inside
Left Front of
Stove
Figure 13 - Installing Screen Into Stove
(View From Back of Stove)
Hole on Inside
Right Front of
Stove
Rod with
Screen
Assembled
INSTALLING LOG SET
1. Set one piece log on heater base as
shown in Figure 14. Make sure middle
section at bottom of log is seated into "U"
shaped cutout in center of heater base.
Log will t securely on base.
IMPORTANT: Make sure log does not
cover any burner ports and does not touch
the stove cavity (see Figure 14).
2. Fasten back panel to stove with 4 bolts
and washers removed in step 4 of Un-
packing, page 8. Make sure product iden-
tication label is located on the outside
lower left hand corner.
3. Place freestanding stove in desired posi-
tion being careful not to damage gas con-
nections. Be sure to maintain clearances
to combustibles and wall clearances as
outlined on page 9.
Figure 14 - Installing One-Piece Stove
Log Set
One-Piece
Log Set
Heater
Base
"U" Shaped
Cutout in
Chassis
Burner
Middle Section
at Bottom of
Log Set
Burner Porting Areas
(double slotted
rectangular openings
Figure 15 - Top View of One-Piece Log
Set on Gas Log Heater
Safety
Pilot
Location
One-Piece
Log Set

www.desatech.com 111487-01G14
1. STOP! Read the safety information,
above.
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 the PILOT position. Press in control knob
for ve (5) seconds (see Figure 16).
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 front 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, page 15.
7. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob.
• If control knob does not pop out when
released, contact a qualified service
person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 3
through 7. This heater has a safety inter-
lock system. Wait one (1) minute for sys-
tem to reset before lighting pilot again.
Figure 16 - Control Knob and Ignitor
Button Location
Control Knob
Ignitor Button
Figure 17 - Pilot
Thermocouple
Pilot Burner
OPERATION
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.
LIGHTING
INSTRUCTIONS
NOTICE:Duringinitialoperation
of new heater, burning logs will
give off a paper-burning smell.
Orange ame will also be pres-
ent.Openawindowtoventsmell.
This will only last a few hours.

www.desatech.com
111487-01G 15
OPERATION
Continued
Figure 18 - Correct Pilot Flame Pattern
(Propane/LP Shown)
Thermocouple
Pilot
Burner
Pilot Burner
Thermocouple
Figure 19 - Incorrect Pilot Flame Pattern
(Propane/LP Shown)
8. Turn control knob counterclockwise
to desired heating level. The burners
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
PILOT position.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise to the
OFF position.
2. Close equipment shutoff valve (see Figure
9, page 12).
THERMOSTAT CONTROL
OPERATION
The thermostat control knob can be set to any
comfort level between HI and LO. The ther-
mostat will gradually modulate the heat output
and ame height from higher to lower settings
or pilot, in order to maintain the comfort level
you select. The ideal comfort setting will vary
by household depending upon the amount of
space to be heated, the output of the central
heating system, etc.
Note: Selecting the HI setting with the control
knob will cause the burner to remain fully on,
without modulating down in most cases.
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Lighting
Instructions, page 14.
2. Press 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 in
Lighting Instructions, page 14.
INSPECTING BURNERS
Check pilot ame pattern and burner ame
patterns often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot ame pattern.
Figure 19 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 heater will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 19
• turn heater off (see To Turn Off Gas to Ap-
pliance)
• see Troubleshooting, page 17
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.
MAIN BURNER
Periodically inspect all burner ame holes with
the heater running. All slotted burner ame
holes should be open with yellow ame pres-
ent. All round burner ame holes should be
open with a small blue ame present. Some
burner ame holes may become blocked by
debris or rust, with no ame present. If so,
turn off heater and let cool. Remove blockage.
Blocked burner ame holes will create soot.

www.desatech.com 111487-01G16
Figure 20 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Injector Holder (May
Be Brass or Aluminum
Depending on Model)
Primary Air Inlet
Holes (Shape of
Holes May Vary
by Model)
Figure 21 - Pilot Inlet Air Hole
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet Hole
Ports/Slots
LOGS
• If you remove logs for cleaning, refer to
Installing Log Set, page 13, to properly
replace logs.
• Replace log(s) if broken or chipped (dime-
sized or larger).
CLEANING AND MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circu-
latingair passagewaysof heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualied service person. Heater
may need more frequent clean-
ing due to excessive lint from
carpeting, pet hair, bedding
material, etc.
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clear may result in
sooting and property damage.
BURNER INJECTOR HOLDER AND
PILOT AIR INLET HOLE
The primary air inlet holes allow the proper
amount of air to mix with the gas. This pro-
vides a clean burning flame. 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 recommend that you clean the unit
every three months during operation and
have heater inspected yearly by a qualied
service person.
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. Note: Removing the
rear panel and top grates of your stove will
make cleaning easier.
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.
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. A yellow tip on
the pilot ame indicates dust and dirt in the
pilot assembly. There is a small 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.

www.desatech.com
111487-01G 17
TROUBLESHOOTING
WARNING: Turn off heater and let cool before servicing. Only a
qualied service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
POSSIBLE CAUSE
1. Ignitor electrode not con-
nected to ignitor cable
2. Ignitor cable pinched or
wet
3. Broken ignitor cable
4. Bad piezo ignitor
5. Ignitor electrode broken
6. Ignitor electrode positioned
wrong
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. ODS/pilot is clogged
6. Gas regulator setting is not
correct
7. Depleted gas supply (pro-
pane/LP only)
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 piezo ignitor
5. Replace pilot assembly
6. Replace pilot assembly
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. Clean ODS/pilot (see
Cleaning and Maintenance,
page 16) or replace ODS/
pilot assembly
6. Replace gas control
7. Contact local propane/LP
gas company
OBSERVED PROBLEM
When ignitor button is
pressed, there is no spark at
ODS/pilot
When ignitor button is
pressed, there is spark at
ODS/pilot but no ignition

www.desatech.com 111487-01G18
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Control k nob 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. Burner orice clogged
2. Inlet gas pressure is too
low
1. Manifold pressure is too
low
2. Burner orice clogged
1. Burner orice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manufac-
turing processes and logs
curing
REMEDY
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 and Maintenance,
page 16) or replace ODS/
pilot assembly
5. Hand tighten until snug,
then tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
1. Clean burner (see Cleaning
and Maintenance, page 16)
or replace burner orice
2. Contact local natural or
propane/LP gas company
1. Contact local natural or
propane/LP gas company
2. Clean burner (see Cleaning
and Maintenance, page 16)
or replace burner orice
1. Clean burner (see Cleaning
and Maintenance, page 16)
or replace burner orice
2. Replace damaged burner
3. Replace gas control
1. Check burner for dirt and
debris. If found, clean
burner (see Cleaning and
Maintenance, page 16)
2. Replace gas control
3. Problem will stop after a few
hours of operation
OBSERVED PROBLEM
ODS/pilot lights but ame
goes out when control knob
is released
Burner does not light after
ODS/pilot is lit
Delayed ignition burner
Burner backfiring during
combustion
Slight smoke or odor during
initial operation

www.desatech.com
111487-01G 19
OBSERVED PROBLEM
Moisture/condensationnoticed
on windows
Heater produces a whistling
noise when burner is lit
Dark residue on logs or inside
of replace
White powder residue forming
within burner box or on adja-
cent walls or furniture
Heater produces a clicking/
ticking noise just after burner
is lit or shut off
REMEDY
1. Refer to Air for Combustion
and Ventilation require-
ments (page 5)
1. Turn control knob to LO
position and let warm up for
a minute
2. Operate burner until air is
removed from line. Have
gas line checked by local
natural or propane/LP gas
company
3. Observe minimum installation
clearances (see page 8)
4. Clean burner (see Cleaning
and Maintenance, page 16)
or replace burner orice
1. Properly locate logs (see In-
stalling Log Set, page 13)
2. Eliminate source of drafts
around heater
3. Clean out air holes at burner
inlet. Periodically repeat as
needed
4. Remove blockage
1. Turn heater off when us-
ing furniture polish, wax,
carpet cleaners or similar
products
1. This is normal with most
heaters. If noise is exces-
sive, contact qualied ser-
vice person
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Not enough combustion/
ventilation air
1. Turning control knob to HI
position when burner is
cold
2. Air in gas line
3. Air passageways on heater
blocked
4. Dirty or partially clogged
burner orice
1. Improper log placement
2. Drafts or other air currents
affecting ame pattern
3. Air holes at burner inlet
blocked
4. Burner flame holes
blocked
1. When heated, vapors from
furniture polish, wax, car-
pet cleaners, etc. may turn
into white powder residue
1. Metal expanding while
heating or contracting
while cooling

www.desatech.com 111487-01G20
WARNING: 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. Fol-
low the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning sup-
plies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc.,
create fumes. These fumes may mix with combustion air and create odors. These odors will
disappear over time.
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Heater burning vapors from
paint, hair spray, glues,
cleaners, chemicals, new
carpet, etc. (See IMPOR-
TANT statement above)
2. Gas leak. See Warning
statement at top of page
1. Not enough fresh air is
available
2. Low line pressure
3. O D S/ pi l ot i s pa r ti al ly
clogged
1. Gas leak. See Warning
statement at top of page
2. Control valve defective
1. Foreign matter between
control valve and burner
2. Gas leak. See Warning
statement at top of page
OBSERVED PROBLEM
Heater produces unwanted
odors
Heater shuts off in use (ODS
operates)
Gas odor even when control
knob is in OFF position
Gas odor during combustion
REMEDY
1. Open window and venti-
late room. Stop using odor
causing products while
heater is running
2. Locate and correct all leaks
(see Checking Gas Con-
nections, page 11)
1. Open window and/or door
for ventilation
2. Contact local natural or
propane/LP gas company
3. Clean ODS/pilot (see
Cleaning and Maintenance,
page 16)
1. Locate and correct all leaks
(see Checking Gas Con-
nections, page 11)
2. Replace control valve
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Con-
nections, page 11)