Comfort Glow CSBNT Quick start guide

Save this manual for future reference.
For more information, visit www.desatech.com
WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
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 fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency or the gas supplier.
UNVENTED (VENT-FREE) GAS STOVE HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
MODELS CSBNT, CSBPT, CSPBNT, CSPBPT, CSPINT, CSPIPT
Propane/LP and Natural Gas Thermostat Control Gas Log Heaters
(Burner System For Cast Iron Stoves)
Golden Oak Logs Shown

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2
WARNING: Improper installation, adjustment, altera-
tion, service or maintenance can cause injury or prop-
erty damage. Refer to this manual for correct installation
and operational procedures. For assistance or addi-
tional information consult a qualified installer, service
agency or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses
air (oxygen) from the room in which it is installed. Provi-
sions 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
State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the
Commonwealth of Massachusetts.
Sellers of unvented propane or natural gas-fired 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 Common-
wealth of Massachusetts.
TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification ........................................... 4
Local Codes ........................................................ 4
Product Features ................................................. 5
Air for Combustion and Ventilation ...................... 5
Unpacking ........................................................... 7
Installation ........................................................... 8
Operating Heater ............................................... 13
Inspecting Burners ............................................ 14
Cleaning and Maintenance ................................ 14
Troubleshooting ................................................. 16
Specifications .................................................... 19
Service Hints ..................................................... 19
Technical Service .............................................. 19
Replacement Parts ............................................ 19
Accessories ....................................................... 19
Illustrated Parts Breakdown and Parts List ....... 20
Parts Centrals .................................................... 23
Warranty Information ...........................Back Cover

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111487-01D 3
SAFETY INFORMATION
WARNING: This product con-
tains and/or generates chemicals
known to the state of California
to cause cancer or birth defects
or other reproductive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate
or service this fireplace. Improper
use of this fireplace can cause seri-
ous 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 flu, with head-
aches, 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 others.
These include pregnant women, people with heart
or lung disease or anemia, those under the influence
of alcohol and those at high altitudes.
Natural and Propane/LP Gas: Natural and pro-
pane/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 warn-
ings. 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.
WARNING: Do not allow fans
to blow directly into the stove.
Avoid any drafts that alter burner
flame patterns. Ceiling fans can
create drafts that alter burner
flame 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 traffic and away from furniture
and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Stove becomes very hot when
running heater. Keep children
and adults away from hot surface
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 flam-
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) in-
side 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
neighborʼs phone. Follow the gas supplierʼs
instructions
• if you cannot reach your gas supplier, call
the fire department

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4
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 fire-
place. 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 smokeless. If
logs ever appear to smoke, turn off heater and
call a qualified service person. Note: During
initial operation, slight smoking could occur
due to log curing and heater burning manu-
facturing residues.
9. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 14.
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.
11. This heater needs fresh, outside air ventilation to
run properly. This heater has an Oxygen Deple-
tion 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 16.
12. Do not run heater
• where flammable 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 exposed
to or under water. Immediately call a qualified
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 servicing.
Only a qualified service person should service
and repair heater.
SAFETY INFORMATION
Continued
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
LOCAL CODES
Install and use heater with care. Follow all local
codes. In the absence of local codes, use the lat-
est 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

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111487-01D 5
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 flames. 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 requires no
matches, batteries or other sources to light heater.
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined space
or unusually tight construction
unless provisions are provided
for adequate combustion and
ventilation air. Read the following
instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Todayʼs homes are built more energy efficient
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 effi-
cient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need
fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, 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, Section 5.3,
Air for Combustion and Ventilation.
All spaces in homes fall into one of the three fol-
lowing ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined 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 ven-
tilation. However, in buildings of unusually tight
construction, you must provide additional fresh air.
Unusually tight construction is defined 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 floors,
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, page 6.
Confined and Unconfined Space
The National Fuel Gas Code ANSI Z223.1/NFPA
54 defines a confined space as a space whose vol-
ume is less than 50 cubic feet per 1,000 Btu per hour
(4.8 m3 per kw) of the aggregate input rating of all
appliances installed in that space and an unconfined
space as a space whose volume is not less than 50
cubic feet per 1,000 Btu per hour (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 unconfined space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills
between them.

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6
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have a
confined or unconfined space.
Space: Includes the room in which you will
install heater 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)
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 sup-
plied 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 = (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 appliances
in the space.
Vent-free heater ________ Btu/Hr
Gas water heater* ________ Btu/Hr
Gas furnace ________ Btu/Hr
Vented gas heater ________ Btu/Hr
Gas fireplace 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)
AIR FOR COMBUSTION
AND VENTILATION
Continued
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 confined
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
unconfined 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 Ven-
tilation Air From Outdoors, page 7.
C. Install a lower Btu/Hr heater, if lower Btu/Hr
size makes room unconfined.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconfined space. You will need no additional
fresh air ventilation.
WARNING: If the area in
which the heater may be oper-
ated is smaller than that defined
as an unconfined space or if the
building is of unusually tight
construction, provide adequate
combustion and ventilation air
by one of the methods described
in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54, Section
5.3 or applicable local codes.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining un-
confined space. When ventilating to an adjoining
unconfined space, you must provide two perma-
nent openings: one within 12" of the ceiling and
one within 12" of the floor on the wall connecting
the two spaces (see options 1 and 2, Figure 2,
page 7). You can also remove door into adjoining
room (see option 3, Figure 2, page 7). Follow the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
Section 5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
40,000
30,000
70,000

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111487-01D 7
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills or
ducts. You must provide two permanent openings:
one within 12" of the ceiling and one within 12"
of the floor. 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,
Section 5.3, 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 thermostat-
controlled power vent. Heated air entering the attic
will activate the power vent.
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
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
UNPACKING
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 care-
fully lift stove up and out of wooden crate.
3. Remove plastic bag from stove body.
4. Remove back panel from stove (see Figure 4).
Use an adjustable wrench or a 10 mm socket.
Remove four (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 all items for any shipping damage. If
damaged, promptly inform dealer where you
bought heater. Some fiber flakes may fall from
logs. This is acceptable.
7. Place freestanding stove near desired location
in room.
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

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8
INSTALLATION
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 heater. This will help
circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING: A qualified 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 flammable
objects are less than 42 inches
from the front, top or sides of
the heater
• in high traffic 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 flu-
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 beneficial, installing heater
in rooms without enough ventilation air may cause
mildew to form from too much moisture. See Air
for Combustion and Ventilation, 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 (natural or pro-
pane/LP) gas. Field conversion
is not permitted.
CLEARANCES TO COMBUSTIBLES
(Vent-Free Operation Only)
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
floor, ceiling and adjoining side
and back walls.
Carefully follow the instructions below. This stove
is a freestanding unit designed to set directly on the
floor. DO NOT place stove directly on carpeting,
vinyl tile or any combustible 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 floor coverings. Important: You
must maintain minimum wall and ceiling clear-
ances during installation. The minimum clearances
are shown in Figure 5, page 9. Measure from
outermost point of stove top.
Minimum Wall and Ceiling Clearances
(see Figure 5, page 9)
A. Clearances from outermost point of stove top
to any combustible side wall should not be
less than 12 inches.
B. Clearances from outermost point of stove top
to any combustible back wall should not be less
than 6 inches (includes corner installations).
C. Clearances from the stove top to the ceiling
should not be less than 48 inches.

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111487-01D 9
INSTALLATION
Continued
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
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 1/2" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualified service
person must connect heater to gas
supply. Follow all local codes.
CAUTION: Never connect
propane/LP heater directly to the
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 com-
monly known as wellhead gas.
Installation Items Needed
Before installing heater, make sure you have the
items listed below.
• external regulator [propane/LP only] (supplied
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-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certified equipment shutoff valve from your
dealer. See Accessories, page 19.
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, page 10. Make sure gas log
heater is secured to the stove cavity assembly.

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10
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 inches
of water. If you do not reduce incoming gas pres-
sure, 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 freezing 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.
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 re-
quirements for locating equipment shutoff valve
to fireplaces.
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.
INSTALLATION
Continued
Figure 6 - Gas Regulator Location and
Gas Line Access Into Stove Cabinet
Back
Stove
Panel
Front
of
Stove
Unit
Gas Inlet
Connection
Access
Product
Identification
Label
Gas Log
Heater
Back ViewSide View
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.
CAUTION: Avoid damage to
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or fittings.
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-
Certified Equipment
Shutoff Valve With
1/8" NPT Tap*
Approved
Flexible Gas
Hose (if allowed
by local codes)
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 19.
** Minimum inlet pressure for purpose of input
adjustment.
Tee Pipe Cap
Joint Nipple
Figure 7 - External Regulator For
Propane/LP Gas With Vent Pointing Down
Propane/LP
Supply Tank
Vent
Pointing
Down
External
Regulator

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111487-01D 11
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak detec-
tion fluid 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 9.
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 equipment
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 equipment
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 system.
Apply noncorrosive leak detection fluid to gas
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected fit-
tings for leaks.
INSTALLATION
Continued
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 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 natural or
propane/LP supply to equipment shutoff valve
(see Figure 10 or Figure 11, page 10). Apply
noncorrosive leak detection fluid to gas joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Figure 9 - Equipment Shutoff Valve
Closed
Equipment
Shutoff Valve Open
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 9).
2. Open main gas valve located on or near gas
meter for natural gas or open propane/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, page
12). Apply noncorrosive leak detection fluid to
gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, page 13).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 14).
Figure 10 - Checking Gas Joints on
Propane/LP Gas Unit
Control Valve
Location
Propane/LP
Supply Tank
Equipment
Shutoff Valve

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12
INSTALLATION
Continued
Figure 11 - Checking Gas Joints on
Natural Gas Unit
Gas Meter
Equipment
Shutoff Valve
Control Valve
Location
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.
3. Slip left side of rod down into slot on inside
left front of stove (see Figure 13).
Figure 12 - Assembling Rod and Screen
Slot on Inside
Left Front of
Stove
Rod
Figure 13 - Installing Screen Into Stove
(View From Back of Stove)
Rings
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 bot-
tom of log is seated into "U" shaped cutout in
center of heater base. Log will fit 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 four (4) bolts
and washers removed in step 4 of Unpacking,
page 7. Make sure product identification label is
located on the outside lower left-hand corner.
3. Place freestanding stove in desired position
being careful not to damage gas connections.
Be sure to maintain clearances to combustibles
and wall clearances as outlined on page 8.
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

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111487-01D 13
4. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP! Follow “B” in the
safety information, column 1. If you donʼt
smell gas, go to the next step.
5. Turn control knob counterclockwise
to the PILOT position. Press in control knob
for five (5) seconds (see Figure 16).
Note: You may be running this heater for
the first time after hooking up to gas sup-
ply. 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
qualified 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 14.
7. Keep control knob pressed in for 30 seconds
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 interlock
system. Wait one (1) minute for system to
reset before lighting pilot again.
8. Turn control knob counterclockwise
to desired heating level. The burners should
light. Set control knob to any heat level
between HI and LO.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
Figure 16 - Control Knob and Ignitor
Button Location
Control Knob
Ignitor Button
Figure 17 - Pilot
Thermocouple
Pilot Burner
OPERATING HEATER
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a fire 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 floor because some gas is heavier than
air and will settle on the floor.
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 neighborʼs phone. Follow the gas
supplierʼs instructions.
• If you cannot reach your gas supplier, call
the fire 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, donʼt
try to repair it, call a qualified service tech-
nician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has been
under water. Immediately call a qualified
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: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Orange flame will also be present.
Open a window to vent smell.
This will only last a few hours.
1. STOP! Read the safety information, abovc.
2. Make sure equipment shutoff valve is
fully open.
3. Turn control knob clockwise to the
OFF position.

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14
OPERATING HEATER
Continued
Note: The correct pilot flame on natural gas units
will have a slight curve, but flame should be blue
and have no yellow or orange color.
Figure 18 - Correct Pilot Flame Pattern
(Propane/LP Shown)
Thermocouple
Pilot
Burner
Pilot Burner
Thermocouple
Figure 19 - Incorrect Pilot Flame Pattern
(Propane/LP Shown)
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise to the
OFF position.
Shutting Off Burners Only (pilot stays lit)
Turn control knob clockwise to the
PILOT position.
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 flame 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 13.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
control knob. Now follow step 8 in Lighting
Instructions, page 13.
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat-
terns often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot flame pattern.
Figure 19 shows an incorrect pilot flame pattern.
The incorrect pilot flame is not touching the
thermocouple. This will cause the thermocouple
to cool. When the thermocouple cools, the heater
will shut down.
If pilot flame pattern is incorrect, as shown in
Figure 19
• turn heater off (see To Turn Off Gas to
Appliance)
• see Troubleshooting, page 16
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep con-
trol areas, burner and circulating
air passageways of heater clean.
Inspect these areas of heater
before each use. Have heater
inspected yearly by a qualified
service person. Heater may need
more frequent cleaning 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.
MAIN BURNER
Periodically inspect all burner flame holes with
the heater running. All slotted burner flame holes
should be open with yellow flame present. All
round burner flame holes should be open with a
small blue flame present. Some burner flame holes
may become blocked by debris or rust, with no
flame present. If so, turn off heater and let cool.
Remove blockage. Blocked burner flame holes
will create soot.

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111487-01D 15
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 provides 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 qualified 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 us-
ing compressed air no greater than 30 PSI. Your
local computer store, hardware store or home
center may carry compressed air in a can. You
can use a vacuum cleaner in the blow position. 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 damage the pilot assembly.
Note: Removing the rear panel and top grates of
your stove will make cleaning easier.
1. Shut off the unit, including the pilot. Allow
the 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 the 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 flame indicates dust and dirt in the pilot as-
sembly. There is a small pilot air inlet hole about
two inches from where the pilot flame 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.
CLEANING AND
MAINTENANCE
Continued
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 Install-
ing Log Set, page 12, to properly replace logs.
• Replace log(s) if broken or chipped (dime-sized
or larger).

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16
TROUBLESHOOTING
WARNING: Turn off heater and let cool before servicing. Only a
qualified 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 equip-
ment 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 installed
5. ODS/pilot is clogged
6. Gas regulator setting is not
correct
7. Depleted gas supply (pro-
pane/LP only)
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 allows
thermocouple to cool, caus-
ing pilot flame 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
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 con-
trol knob. Repeat igniting op-
eration until air is removed
5. Clean ODS/pilot (see Cleaning
and Maintenance, page 14) or
replace ODS/pilot assembly
6. Replace gas control
7. Contact local propane/LP gas
company
1. Press in control knob fully
2. After ODS/pilot lights, keep con-
trol knob pressed in 30 seconds
3. Fully open equipment shutoff
valve
4. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 14) or replace ODS/pilot
assembly
5. Hand tighten until snug, then
tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
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
ODS/pilot lights but flame goes
out when control knob is re-
leased

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111487-01D 17
OBSERVED PROBLEM
Burner does not light after ODS/
pilot is lit
Delayed ignition burner
Burner backfiring during com-
bustion
Slight smoke or odor during initial
operation
Moisture/condensation noticed
on windows
Heater produces a whistling noise
when burner is lit
Dark residue on logs or inside
of fireplace
White powder residue forming
within burner box or on adjacent
walls or furniture
REMEDY
1. Clean burner (see Cleaning
and Maintenance, page 14) or
replace burner orifice
2. Contact local natural or pro-
pane/LP gas company
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner (see Cleaning
and Maintenance, page 14) or
replace burner orifice
1. Clean burner (see Cleaning
and Maintenance, page 14) or
replace burner orifice
2. Replace damaged burner
3. Replace gas control
1. Check burner for dirt and
debris. If found, clean burner
(see Cleaning and Mainte-
nance, page 14)
2. Replace gas control
3. Problem will stop after a few
hours of operation
1. Refer to Air for Combustion
and Ventilation requirements
(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 14) or
replace burner orifice
1. Properly locate logs (see In-
stalling Log Set, page 12)
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 using
furniture polish, wax, carpet
cleaners or similar products
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Burner orifice clogged
2. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice clogged
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing
processes and logs curing
1. Not enough combustion/ven-
tilation 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 orifice
1. Improper log placement
2. Drafts or other air currents
affecting flame pattern
3. Air holes at burner inlet
blocked
4. Burner flame holes blocked
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue

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18
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 fire department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, 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. Metal expanding while heating
or contracting while cooling
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. ODS/pilot is partially
clogged
1. Gas leak. See Warning
statement at top of
page
2. Control valve defective
1. Foreign matter between con-
trol valve and burner
2. Gas leak. See Warning
statement at top of
page
OBSERVED PROBLEM
Heater produces a clicking/tick-
ing noise just after burner is lit
or shut off
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. This is common with most heat-
ers. If noise is excessive, contact
qualified service person
1. Open window and ventilate
room. Stop using odor caus-
ing products while heater is
running
2. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 11)
1. Open window and/or door for
ventilation
2. Contact local natural or pro-
pane/LP gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 14)
1. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 11)
2. Replace control valve
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 11)

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111487-01D 19
SPECIFICATIONS
CSBPT, CSPBPT, CSPIPT
(Includes 111485-01 Burner Chassis)
Btu (Variable) 16,000/30,000
Type Gas Propane/LP Only
Ignition Piezo
Pressure Manifold 8" W.C.
Inlet Gas Pressure (in. of water)
Maximum 14"
Minimum* 11"
Shipping Weight 265 lbs.
* For input adjustment
CSBNT, CSPBNT, CSPINT
(Includes 111485-02 Burner Chassis)
Btu (Variable) 16,000/30,000
Type Gas Natural Gas Only
Ignition Piezo
Pressure Manifold 3.5" W.C.
Inlet Gas Pressure (in. of water)
Maximum 10.5"
Minimum* 5"
Shipping Weight 265 lbs.
* For input adjustment
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If so,
contact your local propane/LP gas supplier.
TECHNICAL SERVICE
You may have further questions about installation,
operation or troubleshooting. If so, contact DESA
Heating Productsʼ Technical Service Department at
1-866-672-6040. When calling, please have your
model and serial numbers of your heater ready.
You can also visit DESA Heating Productsʼ techni-
cal service web site at www.desatech.com.
REPLACEMENT PARTS
Note: Use only original replacement parts. This
will protect your warranty coverage for parts
replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product. If
they canʼt supply original replacement part(s),
call DESA Heating Productsʼ Technical Service
Department at 1-866-672-6040.
When calling DESA Heating Products, have ready
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the part to
the factory.
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they
canʼt supply original replacement part(s), either
contact your nearest Parts Central (see page 23)
or call DESA Heating Products at 1-866-672-6040
for referral information.
When calling DESA Heating Products, have ready
• model number of your heater
• the replacement part number
ACCESSORIES
Purchase these heater accessories from your local
dealer. If they can not supply these accessories,
call DESA Heating Products at 1-866-672-6040
for referral information. You can also write to the
address listed on the back page of this manual.
EQUIPMENT SHUTOFF VALVE
GA5010
For all models. Equipment shutoff valve with 1/8"
NPT tap. Fits 1/2" NPT pipe.
CLEANING KIT - CCK
(Not Shown)
For all models. Your vent-free gas appliance re-
quires regular cleaning and maintenance to prevent
performance problems. This kit gives you the tools
and instructions to make it easy to clean all critical
areas of your appliance.
INFORMATION VIDEO - 108917-01
For all models. A care and maintenance video is avail-
able by calling 1-866-672-6040. You may also email
your request to [e-mail].

www.desatech.com 111487-01D
20
14
16
3
4
15
5
11
6
12
7
10
15
8
9
1
17
2
18
18
18
13
ILLUSTRATED PARTS BREAKDOWN
MODELS 111485-01 AND 111485-02