Comfort Glow (VENT-FREE) GAS STOVE HEATER Operation manual

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.
WARNING: This SL30PT/NT series vent-free gas log
heater is only approved for use in the Comfort Glow
series cast iron stove models CISC and CISG.
(VENT-FREE) GAS STOVE HEATER
OWNER’S OPERATION AND
INSTALLATION MANUAL
MODELS SL30PT AND SL30NT SERIES THERMOSTAT CONTROL
GAS LOG HEATER (BURNER SYSTEM FOR CAST IRON STOVES)

www.desatech.com 115580-01A
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
Installation ........................................................... 7
Operating Heater ............................................... 15
Inspecting Burners ............................................ 16
Cleaning and Maintenance ................................ 17
Troubleshooting ................................................. 18
Specifications .................................................... 21
Service Hints ..................................................... 21
Technical Service .............................................. 21
Replacement Parts ............................................ 21
Accessories ....................................................... 21
Illustrated Parts Breakdown and Parts List ....... 22
Parts Centrals .................................................... 26
Warranty Information ............................Back Page

www.desatech.com
115580-01A 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 heater. Improper
use of this heater 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 propane/
LP gases are odorless. An odor-making agent is
added to these gases. 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 fireplace.
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 (propane/LP units only).
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

www.desatech.com 115580-01A
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 SL30PT or SL30NT
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 17.
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 De-
pletion 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 18.
12. Do not run heater
• where flammable liquids or vapors are used
or stored
• 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).
SAFETY INFORMATION
Continued
16. Turn heater off and let cool before servicing.
Only a qualified service person should service
and repair heater.
17. Operating heater above elevations of 4,500
feet could cause pilot outage.
18. To prevent performance problems, the use of a
propane/LP tank of less than 100 lb. capacity is
not recommended (propane/LP units only).
19. Provide adequate clearances around air
openings.
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
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

www.desatech.com
115580-01A 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 re-
quires 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 con-
struction unless provisions are
provided for adequate combus-
tion 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
ventilation. 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 Determin-
ing Fresh-Air Flow For Heater Location,
page 6.

www.desatech.com 115580-01A
6
Confined and Unconfined Space
The National Fuel Gas Code ANSI Z223.1/NFPA
54 defines a confined space as a space whose
volume 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 com-
municating 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.
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)
AIR FOR COMBUSTION
AND VENTILATION
Continued
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)
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 maxi-
mum 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, page 7.
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
maximum Btu/Hr the space can support, the
space is an unconfined space. You will need
no additional fresh air ventilation.
40,000
30,000
70,000

www.desatech.com
115580-01A 7
AIR FOR COMBUSTION
AND VENTILATION
Continued
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). You
can also remove door into adjoining room (see
option 3, Figure 2). 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.
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.
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
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.

www.desatech.com 115580-01A
8
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 creates
warm air currents. These currents
move heat to wall surfaces next
to heater. Installing heater next
to vinyl or cloth wall coverings or
operating heater where impurities
(such as, but not limited to, to-
bacco smoke, aromatic candles,
cleaning fluids, 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 only the correct gas type (natural or propane/LP)
for your unit. If your gas supply is not correct, 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.
INSTALLATION
Continued
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. IMPORTANT: You must maintain minimum
wall and ceiling clearances during installation.
The minimum clearances are shown in Figure 4.
Measure from outermost point of stove top.
Minimum Wall and Ceiling Clearances
(see Figure 4)
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.
12"
Minimum 12" Minimum
48"
Minimum
Ceiling
Side Wall Side Wall
Back Wall
Side Wall Side Wall
12 "
Minimum
12 "
Minimum
6 "
Minimum
Corner
Wall
Wall
6 "
Minimum
6 "
Minimum
6"
Minimum
48"
Minimum
Ceiling
Floor
Back
Wall
Figure 4 - Minimum Clearance to Walls
and Ceiling (Stove May Vary Depending
on Model)

www.desatech.com
115580-01A 9
STOVE CAVITY ASSEMBLY
1. Lift off corrugated box enclosing stove
body crating.
2. Remove all screws fastening the wood frame
enclosure. Spread wood frame open and lift
away from plastic-bagged stove body. The
bottom pieces of pallet wood will remain
bolted to the stove body.
3. Remove plastic bag from stove body.
4. Remove back panel from stove (see Figure 5).
Use an adjustable wrench or a 10 mm socket.
Remove six (6) bolts and washers. Keep bolts
and washers to reattach back panel later.
5. Remove all contents from inside stove cavity.
Contents include:
(1) - Stove bottom
(4) - Legs (Amity models include leg
leveler bolts)
(1) - Bottom door
(1) - Top grate
(1) - Hardware kit bag with fasteners
6. Carefully lay stove body on back to attach bottom
components to stove body (see Figure 6). Rest
stove on drop cloth or blanket to avoid scratching
stove edges.
INSTALLATION
Continued
Figure 5 - Removing Back Panel
Bolt
Product
Identification
Label
Back Stove
Panel
Figure 6 - Laying Down Stove On Side (Stove Style May Vary Depending on Model)
Front of
Stove
Unit Pallet Wood
Bolted to
Stove Body
Bottom
Top of
Stove Unit
Front of Stove
Unit
Top of
Stove
Unit
Drop Cloth/
Blanket
7. Remove remaining pallet wood attached to
bottom of stove body (see Figure 7). Use an
adjustable wrench to remove bolts.
8. Fasten each leg to stove with four (4) bolts.
Use a flat screw driver to tighten bolt to leg.
Thread bolt in tapped holes on stove body (see
Figure 8 and Figure 9, page 10).
Figure 7 - Removing Pallet Wood From
The Bottom of The Stove
Pallet
Wood
Bolt
Bottom Of
Stove Unit
Front Pallet
Wood
Figure 8 - Locating Threaded Holes
for Stove Bottom, Legs and Door
Attachment (Appearance May Vary
Depending on Model)
Leg
Hole
Leg
Hole
Leg
Hole
Leg Hole
Door Hinge
Step Bolt Hole
Door Catch Bolt
With Adjustable
Hex Nuts Hole
Stove
Bottom
Holes
Front
Bottom Of Stove Unit

www.desatech.com 115580-01A
10
INSTALLATION
Continued
9. Fasten stove bottom to stove with four (4)
M6 x 1 - 25mm bolts. Use a flat washer and
lock washer with each bolt. Tighten bolts into
threaded holes on stove body (see Figure 10
and Figure 8 on page 9). Use an adjustable
wrench or a 10mm socket.
10. Attach stove door by inserting step bolt
through door hinge pivot holes and into
threaded hole in stove body (see Figure 11).
Use an adjustable wrench or a 12mm socket to
fasten step bolt. Tighten step bolt until snug.
Make sure door moves freely.
11. Install door catch bolt (M8 x 1.25-55mm with
two M8 hex nuts) into threaded hole on stove
body (see Figure 8, page 9). Use an adjustable
wrench or a 12mm socket. The catch bolt has
two hex nuts attached to it (see Figure 12).
The top nut is a bolt stop and the bottom nut
is for door leveling adjustment.
12. Check general catch bolt alignment with door
claw. Make final adjustment and door leveling
after stove is in normal standing position.
13. Carefully lift stove back up on its four at-
tached legs.
Figure 9 - Attaching Stove Legs
Bottom Of
Stove Unit
Leg
Bolt
Figure 10 - Attaching Stove Bottom
Bottom Of
Stove Unit
Bolt
Washers
Stove
Bottom
14. If available, install gas log heater inside stove
cavity before installing the back panel (see In-
stalling Gas Log Heater Into Stove, page 11).
15. Fasten back panel to stove with six (6) M6 x 1
- 20mm bolts and washers. Make sure product
identification label is located on the outside in
lower left-hand corner.
Figure 11 - Attaching Stove Door
(Appearance May Vary Depending on
Model)
Step
Bolt
Door
Hinge
Threaded
Hole
Stove Door
Stove Bottom
Bolt
Shoulder
Door
Hinge
Step
Bolt
Bolt
Shoulder
Adjusting
Nut
Bolt Stop
Catch Bolt
Door Claw
Door
Figure 12 - Catch Bolt and Door Claw
Orientation

www.desatech.com
115580-01A 11
INSTALLING GAS LOG HEATER
INTO STOVE
1. Remove log and gas log heater from carton.
Note: Do not pick up gas log heater by the
burner itself. This could damage heater. Al-
ways handle the gas log heater by the heater
base only.
2. Remove all protective packaging applied to
log and gas log heater for shipment.
3. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought heater.
4. If not already removed, remove back panel
from assembled stove body (see Figure 5,
page 9). Use an adjustable wrench or a 10 mm
socket. Remove six (6) bolts and washers. Keep
bolts and washers to reattach back panel later.
5. Set gas log heater inside stove (see Figure
13). Make sure control knob extensions pass
through bottom front opening.
6. Align outside holes on heater base with four
(4) mounting holes on the stove bottom (see
Figure 13).
7. Fasten heater base to stove bottom with #10-24
x .50 bolts and hex nuts provided with gas log
heater (see Figure 14). Attachment hardware
is factory packed inside plastic bag with
installation manual and ownerʼs registration
card. Push bolt through heater base mounting
hole and through stove bottom. Connect hex
nut to bolt on underside of stove bottom. The
bolt hex head is for a 5/16" socket and the hex
nuts are for a 3/8" socket. If sockets are not
available, use adjustable wrenches.
INSTALLATION
Continued
Figure 13 - Placing Heater Base In Stove
Cavity (Appearance May Vary Depending
on Model)
Bottom
Front
Opening Stove
Bottom
Burner
Bolt
Heater
Base
Figure 14 - Fastening Heater Base to
Stove Drop Bottom
Stove Bottom
Heater
Base
Bolt
Hex Nut
One-
Piece
Log Set
"U" Shaped Cutout
in Chassis
Burner
Middle
Section at
Bottom of
Log Set
Figure 15 - Installing One-Piece Stove
Log Set
Heater
Base
8. Set one-piece log on heater base as shown in
Figure 15. 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 16).
9. Fasten back panel to stove with six (6) M6 x
1.20mm bolts and washers. Make sure product
identification label is located on the outside
lower left-hand corner.
10. Place freestanding stove in desired position
in room. Be sure to maintain clearances to
combustibles as outlined on page 8.
Burner Porting Areas (double
slotted rectangular openings)
Figure 16 - Top View of One-Piece Log
Set on Gas Log Heater
Safety Pilot Location
One-Piece
Log Set

www.desatech.com 115580-01A
12
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 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. Pro-
pane/LP heaters require an ex-
ternal regulator (not supplied).
Install the external regulator
between the heater and pro-
pane/LP supply.
WARNING: For natural gas
units, never connect 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 for propane/LP units
(supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-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 21.
Figure 17 - Gas Regulator Location and
Gas Line Access Into Stove Cabinet
Back
Stove
Panel
Front of
Stove
Unit
Gas Inlet
Connection
Access
Product
Identifica-
tion Label
Gas Log Heater
Back View
Side View
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 17. Make sure gas log heater
is secured to the stove cavity assembly.
For propane/LP gas, 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 18. Pointing the vent down protects
it from freezing rain or sleet.
Back
Stove
Panel
Figure 18 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank
Vent
Pointing
Down
External
Regulator

www.desatech.com
115580-01A 13
CAUTION: 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 vol-
ume to heater. If pipe is too small,
undue loss of volume will occur.
Installation must include a 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 19).
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.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
INSTALLATION
Continued
Tee Pipe Cap
Joint Nipple
Figure 19 - Gas Connection
3" Minimum
Sediment Trap
Gas
Regulator
Natural
From, Gas
Meter (5" W.C.
** to 10.5" W.C.
Pressure)
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
We recommend that you install a sediment trap in
supply line as shown in Figure 19. 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.
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.
Propane/LP
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
* Purchase the optional CSA design-certified equipment shutoff valve from your dealer.
See Accessories, page 21.
** Minimum inlet pressure for purpose of input adjustment.

www.desatech.com 115580-01A
14
CAUTION: For propane/LP
units, make sure external regula-
tor has been installed between
propane/LP supply and heater.
See guidelines under Connect-
ing to Gas Supply, page 12.
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 off 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.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 20).
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 (natural gas) or
propane/LP supply to equipment shutoff valve
(see Figure 21 or 22). Apply noncorrosive leak
detection fluid to gas joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
INSTALLATION
Continued
Figure 20- Equipment Shutoff Valve
Closed
Equipment
Shutoff
Valve
Open
Figure 21 - Checking Gas Joints
(Propane/LP Gas Only)
Control Valve
Location
Propane/LP
Supply Tank
Equipment Shutoff Valve
Figure 22 - Checking Gas Joints
(Natural Gas Only)
Control Valve
Location
Gas Meter
Equipment Shutoff Valve
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 20).
2. Open propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF
position.
4. Check all joints from gas meter (natural gas) or
propane/LP supply to equipment shutoff valve
(see Figure 21 or 22). 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 15).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 16).

www.desatech.com
115580-01A 15
3. Turn control knob clockwise to the
OFF position.
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 23).
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 16.
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.
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 pres-
ent. Open a window to vent smell.
This will only last a few hours.
1. STOP! Read the safety information,
above.
2. Make sure equipment shutoff valve is fully
open.
Figure 23 - Control Knob and Ignitor
Button Location
Control
Knob
Ignitor Button
Figure 24 - Pilot (Propane/LP Shown)
Thermocouple
Pilot Burner

www.desatech.com 115580-01A
16
8. Turn control knob counterclockwise
to desired heating level. The burn-
ers 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.
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 15.
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, above.
OPERATING HEATER
Continued
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat-
terns often.
PILOT FLAME PATTERN
Figure 25 shows a correct pilot flame pattern.
Figure 26 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 26
• turn heater off (see To Turn Off Gas to Appli-
ance, column 1)
• see Troubleshooting, page 18
Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue and
have no yellow or orange color.
Figure 25 - Correct Pilot Flame Pattern
Figure 26 - Incorrect Pilot Flame Pattern
Pilot Burner
Thermocouple
Pilot Burner
Propane/LP Natural Gas
Pilot Burner Pilot Burner
Thermocouple
Propane/LP Natural Gas

www.desatech.com
115580-01A 17
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circu-
lating 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 clean-
ing due to excessive lint from
carpeting, pet hair, bedding
material, etc.
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 27).
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 28). 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.
Figure 27 - 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 28 - Pilot Inlet Air Hole
Burner
Tube
Pilot
Assembly Pilot
Air Inlet
Hole
Ports/Slots

www.desatech.com 115580-01A
18
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 connected
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 (Propane/
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 thermo-
couple, which allows thermocouple
to cool, causing 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 equip-
ment shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PI-
LOT position
4. Continue holding down control
knob. Repeat igniting operation until
air is removed
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 17) 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 control
knob pressed in 30 seconds
3. Fully open equipment shutoff
valve
4. A) Contact local natural or pro-
pane/LP gas company
B) Clean ODS/pilot (see Clean-
ing and Maintenance, page 17) 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 released

www.desatech.com
115580-01A 19
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
REMEDY
1. Clean burner (see Cleaning
and Maintenance, page 17)
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 17)
or replace burner orifice
1. Clean burner (see Cleaning
and Maintenance, page 17)
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 17)
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 7)
4. Clean burner (see Cleaning
and Maintenance, page 17)
or replace burner orifice
1. Properly locate logs (see In-
stalling Gas Log Heater Into
Stove, page 11)
2. Eliminate source of drafts
around heater
3. Clean out air holes at burner
inlet. Periodically repeat as
needed
4. Remove blockage
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

www.desatech.com 115580-01A
20
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.
POSSIBLE CAUSE
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue
1. Metal expanding while heat-
ing 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
control valve and burner
2. Gas leak. See Warning
statement at top of page
OBSERVED PROBLEM
White powder residue forming
within burner box or on adjacent
walls or furniture
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. Turn heater off when using
furniture polish, wax, carpet
cleaners or similar products
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 13)
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 17)
1. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 13)
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 13)
TROUBLESHOOTING
Continued