Desa Sgs3124na18and24 113101 01C User Manual 21253eab A6b2 0e84 314b 7459f827fbd8
User Manual: desa sgs3124na18and24 Desa Water Heater CGS2718PA, CGS2718NA, CGS3124PA, CGS3124NA, SGS3124PA, SGS3124NA,CLD3018PTA, CLD3018NTA, CLD3924NTB, CLD3924PTB User Guide |
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Page Count: 36
- Safety Information
- Product Identification
- Local Codes
- Unpacking
- Product Features
- Air For Combustion and Ventilation
- Installation
- Operating Heater
- Inspecting Burners
- Cleaning and Maintenance
- Technical Service
- Service Hints
- Replacement Parts
- Troubleshooting
- Optional Positioning of Thermostat Sensing Bulb
- Specifications
- Accessories
- Parts Central
- Illustrated Parts Breakdown and Parts List
- Warranty Information

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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.
ROYAL ENGLISH OAK AND WINCHESTER OAK UNVENTED 
(VENT-FREE) GAS LOG HEATER  
OWNER’S OPERATION AND INSTALLATION MANUAL
Patent Pending
Variable Manually-Controlled Models Also Design-Certified as 
Vented Decorative Appliances
18" AND 24" VARIABLE MANUALLY-CONTROLLED MODELS
CGS2718PA, CGS2718NA, CGS3124PA, CGS3124NA
SGS3124PA, SGS3124NA
18" AND 24" THERMOSTATICALLY-CONTROLLED MODELS
CLD3018PTA, CLD3018NTA CLD3924PTB, CLD3924NTB

www.desatech.com 113101-01C
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 appliance is  for installation only  in a 
solid-fuel burning masonry or UL127 factory-built fire-
place or in a listed ventless firebox enclosure. It is de-
sign-certified for these installations in accordance with 
ANSI Z21.11.2. Exception: Do not install this appliance 
in  a  factory-built  fireplace  that  includes  instructions 
stating it has not been tested or should not be used with 
unvented gas logs.
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 
TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification ........................................... 4
Local Codes ........................................................ 5
Unpacking ........................................................... 5
Product Features ................................................. 5
Air For Combustion and Ventilation ..................... 5
Installation ........................................................... 8
Operating Heater ............................................... 18
Inspecting Burners ............................................ 22
Cleaning and Maintenance ................................ 23
Technical Service .............................................. 24
Service Hints ..................................................... 24
Replacement Parts ............................................ 24
Troubleshooting ................................................. 25
Optional Positioning of Thermostat Sensing Bulb
 ... 29
Specifications .................................................... 30
Accessories ....................................................... 31
Parts Central ..................................................... 31
Illustrated Parts Breakdown and Parts List ....... 32
Warranty Information ...........................Back Cover

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113101-01C 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,  op-
erate  or  service  this  fireplace. 
Improper  use  of  this  fireplace 
can  cause  serious  injury  or 
death  from  burns,  fire,  explo-
sion, electrical shock and carbon 
monoxide poisoning.
 DANGER: Carbon monoxide 
poisoning may lead to death!
Carbon  Monoxide  Poisoning:  Early  signs  of 
carbon monoxide poisoning resemble the flu, with 
headaches, dizziness or nausea. If you have these 
signs, the fireplace may not be working properly. 
Get fresh  air  at  once!  Have  fireplace  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 warnings. 
Keep this manual for reference. It is your guide to 
safe and proper operation of this fireplace.
  WARNING:  Any  change  to 
this  heater  or  its  controls  can 
be dangerous.
  WARNING:  Do  not  use  a 
blower  insert,  heat  exchanger 
insert or other accessory not ap-
proved for use with this heater.
 WARNING: Do not allow fans 
to blow directly into the fireplace. 
Avoid any drafts that alter burner 
flame patterns. Ceiling fans can 
create  drafts  that  alter  burner 
flame  patterns.  Altered  burner 
patterns can cause sooting.
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.
Heater base assembly becomes 
very  hot  when  running  heater. 
Keep children and adults away 
from hot surface to avoid burns 
or  clothing  ignition.  Heater 
will remain hot for a time after 
shutdown. Allow surface to cool 
before touching.
Carefully  supervise  young  chil-
dren when they are in the room 
with heater. When using the hand-
held remote accessory, keep se-
lector switch in the OFF position 
to prevent children from turning 
on burners with remote. 
You  must  operate  this  heater 
with a fireplace screen in place. 
Make  sure  fireplace  screen  is 
closed before running heater.
Keep  the  appliance  area  clear 
and free from combustible ma-
terials, gasoline and other flam-
mable vapors and liquids.

www.desatech.com 113101-01C
4
SAFETY INFORMATION
Continued
Figure 1 - Yellow Flame Vent-Free Gas 
Log Heater Shown (Logs May Vary by 
Model)
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.  To  prevent  performance  problems,  the  use 
of  a  propane/LP  tank  of  less  than  100  lbs. 
capacity  is  not  recommended  (propane/LP 
units only).
4.  If you smell gas
•  shut off gas supply
•  do not try to light any appliance
•  do not touch any electrical switch; do not 
use any phone in your building
•  immediately call your gas supplier from 
a  neighborʼs  phone.  Follow  the  gas 
supplierʼs instructions
•  if you cannot reach your gas supplier, call 
the fire department
5.  This heater shall not be installed in a bedroom 
or bathroom unless installed as a vented appli-
ance (Variable Manually-Controlled Models 
Only) (see Installing Damper Clamp Acces-
sory for Vented Operation, page 12).
6.  Do not burn solid-fuel in a masonry or UL127 
factory-built  fireplace  in  which  a  vent-free 
room heater is installed.
7.  Before  installing  in  a  solid  fuel  burning 
fireplace, the chimney flue and firebox must 
be cleaned of soot, creosote, ashes and loose 
paint by a qualified chimney cleaner. Creosote 
will ignite if highly heated. A dirty chimney 
flue  may  create  and  distribute  soot  within 
the house. Inspect chimney flue and firebox 
for  damage.  If  damaged,  repair  flue  before 
operating heater.
8. 
If fireplace  has glass doors, never operate  this 
heater with  glass  doors closed.  If you  operate 
heater with doors closed, heat buildup inside fire-
place will cause glass to burst. Make sure there are 
no obstructions across openings of fireplace.
9.  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. 
10.  To prevent the creation of soot, follow the 
instructions  in  Cleaning  and  Maintenance, 
page 23.
11.  Before  using  furniture  polish,  wax,  carpet 
cleaner or similar products, turn heater off. If 
heated, the vapors from these products may 
create a white powder residue within burner 
box or on adjacent walls or furniture.
12.  This heater needs fresh, outside air 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 25.
13.  Do not run heater
•  where flammable  liquids  or  vapors  are 
used or stored
•  under dusty conditions
14.  Do not use this heater to cook food or burn 
paper or other objects.
15.  Do not use heater if any part has been 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. 
16.  Do not operate heater if any log is broken. Do 
not operate heater if a log is chipped (dime-
sized or larger). 
17.  Turn heater off and let cool before servicing. 
Only a qualified service person should service 
and repair heater.
18.  Operating  heater  above  elevations  of  4,500 
feet could cause pilot outage.
19.  Provide  adequate  clearances  around  air 
openings.
PRODUCT 
IDENTIFICATION

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113101-01C 5
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/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY  10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA  02269
Note: Where  listed  vented  decorative  logs  are 
required, thermostat models are not permitted. 
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  with  flue  damper  closed.  It  has  been 
tested and approved to ANSI Z21.11.2 standard 
for  unvented  heaters.  State  and  local  codes  in 
some areas prohibit the use of vent-free heaters. 
Non-thermostat models may also be operated as 
a  vented  decorative  (ANSI  Z21.60)  product  by 
opening flue damper.
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.
UNPACKING
 CAUTION: Do not remove the 
data  plates  from  the  grate  as-
sembly. The data plates contain 
important  warranty  and  safety 
information.
1.  Remove logs and heater base assembly from 
carton. Note: Do not pick up heater base as-
sembly by burners. This could damage heater. 
Always handle base assembly by grate. 
2.  Remove all protective packaging  applied  to 
logs and heater for shipment.
3.  Check all items for any shipping damage. If 
damaged, promptly inform dealer where you 
bought heater.
State  of  Massachusetts:  The  installa-
tion  must  be  made  by  a  licensed  plumber 
or  gas  fitter  in  the  Commonwealth  of 
Massachusetts.
Sellers  of  unvented  propane  or  natural 
gas-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 
Commonwealth of Massachusetts.

www.desatech.com 113101-01C
6
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 (6x10-11 kg per pa-sec-m2) or 
less with openings gasketed or sealed 
and 
b.  weather stripping has been added on 
openable windows and doors and 
c.  caulking  or  sealants  are  applied  to 
areas  such  as  joints  around  window 
and door frames, between sole plates 
and floors, between wall-ceiling joints, 
between  wall  panels,  at penetrations 
for plumbing, electrical and gas lines 
and at other openings.
If your home meets all of the three criteria 
above, you must provide additional fresh air. 
See Ventilation Air From Outdoors, page 7. 
If your home does not meet all of the three 
criteria  above,  proceed  to  Determining 
Fresh-Air Flow For Heater Location.
AIR FOR COMBUSTION 
AND VENTILATION
Continued
Confined Space 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 FIREPLACE 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 
fireplace plus any adjoining rooms with doorless pas-
sageways 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)  =  2,560  cu.  ft. 
(volume of space)
  If  additional  ventilation  to  adjoining  room  is 
supplied with grills or openings, add the volume 
of these rooms to the total volume of the space. 
2.  Multiply the space volume by  20 to determine 
the maximum Btu/Hr the space can support.
   __________ (volume of  space)  x 20 =  (Maxi-
mum Btu/Hr the space can support)
 Example: 2,560 cu. ft. (volume of space) x 20 = 
51,200 (maximum Btu/Hr the space can support)
3.  Add the Btu/Hr of all fuel burning appliances in 
the space.
  Vent-free fireplace    __________ 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. Di-
rect-vent draws combustion air from the outdoors 
and vents to the outdoors.

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113101-01C 7
 Example: 
  Gas water heater    __________ Btu/Hr
  Vent-free fireplace  + 
__________ 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) 
    71,500  Btu/Hr  (actual  amount  of 
Btu/Hr used)
The space in the 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 ad-
ditional fresh air. Your options are as follows:
A.  Rework worksheet, adding the space of an adjoin-
ing 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 Ventila-
tion Air From Outdoors, page 7.
C.  Install a lower Btu/Hr fireplace, 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  un-
confined  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-
40,000
31,500
71,500
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
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.
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.

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8
 WARNING: Never install the 
heater
• 
in a bedroom or bathroom unless 
installed as a vented appliance 
(Variable  Manually-Controlled 
Models Only) (see page 12)
•  in a recreational vehicle
• 
where curtains, furniture, cloth-
ing 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 pro-
pane/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 AND CLEARANCES 
(Vent-Free Operation Only)
  WARNING:  Maintain  the 
minimum clearances. If you can, 
provide greater clearances from 
floor, ceiling and adjoining wall.
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.
NOTICE: State or local codes may 
only allow operation of this appli-
ance in a  vented  configuration. 
Check your state or local codes. 
 WARNING: Before installing 
in a solid fuel burning fireplace, 
the  chimney  flue  and  firebox 
must be cleaned of soot, creo-
sote, ashes and loose paint by a 
qualified chimney cleaner. Creo-
sote will ignite if highly heated. A 
dirty chimney flue may create and 
distribute soot within the house. 
Inspect chimney flue and firebox 
for damage.  If damaged, repair 
flue before operating heater.
  WARNING:  Seal  any  fresh 
air vents or ash clean-out doors 
located on floor or wall of fire-
place. If not, drafting may cause 
pilot  outage  or  sooting.  Use  a 
heat-resistant  sealant.  Do  not 
seal chimney flue damper. 

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113101-01C 9
LOG SIZING REQUIREMENTS
  Minimum Firebox Size
  Log      Front  Rear
  Size  Height  Depth   Width  Width*
  18"  17"  14"  24"  20"
  24"  17"  14"  28"  21"
MINIMUM FIREPLACE CLEARANCE  
TO COMBUSTIBLE MATERIALS
  Log Size  Side Wall  Ceiling
  18", 24"  16"  42"
*Measured at 14" Depth
Carefully follow the instructions below. This will 
ensure safe  installation into a  masonry,  UL127-
listed manufactured fireplace or certified vent-free 
firebox.
Minimum Clearances For Side 
Combustible Material, Side Wall and 
Ceiling 
A.  Clearances  from  the  side  of  the  fireplace 
cabinet to any combustible material and wall 
should follow diagram in Figure 4.
 Example: The face of a mantel,  bookshelf, 
etc.  is  made  of  combustible  material  and 
protrudes 3 1/2" from the wall. This combus-
tible material must be 4" from the side of the 
fireplace cabinet (see Figure 4).
 Note: When  installing  your  gas  logs  into 
a  manufactured  firebox,  follow  firebox 
manufacturerʼs  instructions  for  minimum 
clearances to combustible materials.
B.  Clearances  from  the  top  of  the  fireplace 
opening  to  the  ceiling  should  not  be  less 
than 42 inches. 
Figure 4 - Minimum Clearance for 
Combustible to Wall 
*Minimum 16 inches from Side Wall 
*
Example
INSTALLATION
Continued
NOTICE:  Manual  control  heaters 
may be used as a vented product. 
If so, you must always run heater 
with chimney flue damper open. If 
running heater with damper open, 
noncombustible material above fire-
place opening is not needed. Go to 
Installing Damper Clamp Accessory 
for Vented Operation, page 12.
Minimum Noncombustible Material 
Clearances
If Not Using Mantel
Note:  If  using  a  mantel,  proceed  to  If  Using 
Mantel, page 10. If not using a mantel, follow the 
information below. 
You must have noncombustible material(s)  above 
the fireplace opening. Noncombustible materials 
(such as slate,  marble, tile, etc.) must  be  at  least 
1/2  inch thick. With sheet metal, you must have 
noncombustible material behind it. Noncombustible 
material must extend at least 8" up (for all models). If 
noncombustible material is less than 12", you must 
install the fireplace hood accessory (24" model only). 
See Figure 5 for minimum clearances.
Noncombustible   
Material   Requirements for 
Distance (A)  Safe Installation
12" or more  Noncombustible material okay.
Between 8"   24" Model: Install fireplace 
and 12"  hood accessory (GA6050,
  GA6052 or GA6053,see 
 Accessories, page 31).
 18" Model: Noncombustible 
  material okay.
Less than 8"  Noncombustible material must 
  be extended to at least 8". 
  See Between 8" and 12", 
  above. If you cannot extend 
  material, you must operate 
  heater with flue damper open.
Heat Resistant
Material 
(A)
Figure 5 - Heat Resistant Material (Slate, 
Marble, Tile, etc.) Above Fireplace

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10
Minimum Non-
Combustible 
Material 
Minimum Non-
Combustible 
Material Height 
Distances to 
Underside of
Mantel 
Top of Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
12"
8"
(A)
18"
8"
20"
14"
22"
17"
24"
20"
All minimum 
distances are
in inches
Log Set
24" Model
18" Model
2 1/2"
6"
8"
10"
IMPORTANT: If you cannot meet these minimum 
clearances, you must operate heater with chimney 
flue damper open. Go to Installing Damper Clamp 
Accessory for Vented Operation, page 12.
If Using Mantel
You must have noncombustible material(s) above 
the fireplace opening. Noncombustible materials 
(such as slate, marble, tile, etc.) must be at least 
1/2 inch thick. With sheet metal, you must have 
noncombustible material behind it. Noncombustible 
material must extend at least 8 inches up (for all 
models). If noncombustible material is  less  than 
12", you must install the fireplace hood accessory 
(24" model only). Even if noncombustible material 
is more than 12", you may need the hood accessory 
to deflect heat away from your mantel shelf. See 
Figure 5 (see page 9), Figure 6 and Figure 7 (see 
page 11) for minimum clearances. 
IMPORTANT: If you cannot meet these minimum 
clearances, you must operate heater with chimney 
flue damper open. Go to Installing Damper Clamp 
Accessory for Vented Operation, page 12.
INSTALLATION
Continued
MANTEL CLEARANCES
In addition  to  meeting  noncombustible  material 
clearances, you must also meet required clearances 
between  fireplace  opening  and  mantel  shelf.  If 
you do not meet the clearances listed below, you 
will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between mantel 
shelf and top of fireplace opening, a hood is not 
required (see Figure 6).
Determining Minimum Mantel Clearance 
when Using a Hood
If minimum clearances in Figure 6 are not met, you 
must have a hood. When using a hood there are 
still certain minimum mantel clearances required. 
Follow minimum clearances shown in Figure 7, 
page 11, when using a hood.
NOTICE:  Surface  temperatures 
of adjacent walls and mantels be-
come hot during operation. Walls 
and  mantels  above  the  firebox 
may  become  hot  to  the  touch. 
If installed properly, these tem-
peratures meet the requirement 
of the national product standard. 
Follow all minimum clearances 
shown in this manual.
Figure 6 - Minimum Mantel Clearances Without Using Hood

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113101-01C 11
INSTALLATION
Continued
Figure 7 - Minimum Mantel Clearances When Using Hood
Minimum Non-
Combustible 
Material  8"
Min.
12" 15"
18"
All minimum 
distances are
in inches
Log Set
18" and 24" 
Models 
20"
2 1/2"
6"
8"
10"
12"
Distances to 
Underside of
Mantel 
Hood
(GA6050, GA6052)
Top of Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
(GA6050, GA6052 
or GA6053)
14"
Min.
Combustible 
Material 
Noncombustible Material 
Hearth
5"
Min.
Combustible 
Material 
Figure 9 - Minimum Fireplace Clearances 
Above Combustible Flooring
Figure 8 - Minimum Fireplace Clearances 
If Installed at Floor Level
NOTICE: If your installation does 
not  meet  the  minimum  clear-
ances shown, you must do one 
of the following:
•  operate the logs only with the 
flue damper open
•  raise the mantel to an accept-
able height
•  remove the mantel
FLOOR CLEARANCES
A.  If installing appliance on the floor level, you 
must maintain the minimum distance of 14" 
to combustibles (see Figure 8).
B.  If combustible materials are less than 14" to 
the  fireplace,  you  must  install  appliance  at 
least 5" above the combustible flooring (see 
Figure 9).

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12
Area of Various Standard Round Flues
  Diameter (ins.)  Area (sq. ins.)
  5"  20 sq. inches
  6"  29 sq. inches
  7"  39 sq. inches
  8"  51 sq. inches
  Chimney   Minimum Permanent 
  Height (ft.)  Flue Opening (sq. ins.)
  6' to 15'  39 sq. inches
  15' to 30'  29 sq. inches
Figure 10 - Attaching Damper Clamp 
Manufactured 
Fireplace
Masonry Fireplace
Damper
Damper 
Clamp
Damper
Damper
INSTALLING DAMPER CLAMP 
ACCESSORY FOR VENTED 
OPERATION
Note: When  used  as  a  vented  heater,  appliance 
must  be  installed  only  in  a  solid-fuel  burning 
fireplace with a working flue and constructed of 
noncombustible material.
If your heater is a manually-controlled model, you 
may  use  this  heater  as  a  vented  product.  There 
are three reasons for operating your heater in the 
vented mode. 
1.  The fireplace does not meet the clearance 
to combustibles requirements for vent-free 
operation. 
2.  State or local codes do not permit vent-free 
operation. 
3.  You prefer vented operation. 
If reasons number 1 or 2 above apply to you, you 
must permanently open chimney flue damper. You 
must install the damper clamp accessory (to order, 
see Accessories, page 31). This will insure vented 
operation (see Figure 10). The damper clamp will 
keep  damper  open.  Installation  instructions  are 
included with clamp accessory. 
See  chart  below  for  minimum  permanent  flue 
opening you must provide. Attach damper clamp 
so the minimum permanent flue opening will be 
maintained at all times. 
INSTALLATION
Continued
INSTALLING HEATER BASE 
ASSEMBLY
 CAUTION: Do not remove the 
data plates attached to the heater 
base assembly. The data plates 
contain important warranty and 
safety information.
 WARNING: You must secure 
this heater to  fireplace  floor.  If 
not, heater will move when you 
adjust controls. Moving heater 
may cause a gas leak.
  WARNING:  If  installing  in a 
sunken  fireplace,  special  care 
is  needed.  You  must  raise  the 
fireplace floor to allow access to 
heater control panel. This will in-
sure adequate air flow and guard 
against sooting and controls be-
ing damaged. Raise fireplace floor 
with  noncombustible  material. 
Make sure material is secure.
  CAUTION:  Do  not  pick  up 
heater  base  assembly  by  the 
burner.  This  could  damage 
heater.  Only  handle  base  as-
sembly by grates.

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113101-01C 13
INSTALLATION
Continued
IMPORTANT: Make sure the heater burners are 
level. If heater is not level, heater will not work 
properly.  For  thermostat  models,  avoid  damage 
to  thermostat  bulb. Avoid  nicks  or  sharp  bends 
in  thermostat  bulb  wire.  Keep  thermostat  bulb 
in  mounting  bracket  until  ready  to  mount  base 
to floor. See Optional Positioning Of Thermostat 
Sensing Bulb, page 29.
Installation Items Needed
•  hardware package (provided with heater)
•  approved  flexible gas  hose (not  provided)  (if 
allowed by local codes) 
• 
sealant (resistant to propane/LP gas, not provided)
•  electric drill with 3/16" drill bit 
•  flathead screwdriver
1.  Apply pipe joint sealant lightly to male threads 
of the fitting to be threaded into gas regulator. 
Connect  approved  flexible  gas  hose  to  gas 
regulator of heater (see Figure 11). 
 IMPORTANT:  Hold  gas  regulator  with 
wrench when connecting flexible gas hose.
2.  Locate masonry screws in hardware package.
3.  Position heater base assembly in fireplace. 
4.  Place logs in their proper position on heater 
base (see Installing Logs, page 16).
5.  Center heater base and logs front-to-front and 
side-to-side in fireplace.
6.  Carefully remove  logs  without  moving 
heater base.
7.  Mark screw locations through holes in mount-
ing brackets (see Figure 12). If installing in a 
brick-bottom fireplace, mark screw locations 
in mortar joint of bricks.
8.  Remove heater base from fireplace.
9.  Drill  holes  at  marked  locations  using 3/16" 
drill bit. 
10.  Attach base assembly to fireplace floor using 
two masonry  screws (in  hardware package) 
(see Figure 12). 
Figure 12 - Attaching Base Assembly to 
Fireplace Floor 
Heater Gas 
Regulator
Flexible Gas Hose  
(if allowed by local codes)
Figure 11 - Attaching Flexible Gas Hose 
to Heater Gas Regulator
Fitting 
Masonry 
Screw
Mounting 
Bracket
CONNECTING TO GAS SUPPLY
  WARNING:  This  appliance 
requires  a  1/2"  NPT  (National 
Pipe Thread) inlet connection to 
the pressure regulator.
  WARNING:  A  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. Propane/LP 
heaters require an external regu-
lator  (not  supplied).  Install  the 
external regulator between the 
heater and propane/LP supply.
 WARNING: For natural gas 
units,  never  connect  heater  to 
private  (non-utility)  gas  wells. 
This  gas  is  commonly  known 
as wellhead gas. 

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14
Installation Items Needed
Before installing heater, make sure you have the 
items listed below.
•  external regulator (supplied by installer)
•  piping (check local codes)
•  sealant (resistant to propane/LP gas)
•  equipment shutoff valve *
•  test gauge connection *
•  sediment trap
•  tee joint
•  pipe wrench
* A CSA design-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 31.
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  13.  Pointing the  vent  down 
protects it from freezing rain or sleet.
 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 volume 
to heater. If pipe is too small, undue 
loss of volume will occur.
INSTALLATION
Continued
Figure 13 - External Regulator With Vent 
Pointing Down
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 14).
IMPORTANT: Install equipment shutoff valve in an 
accessible location. The main gas valve is for turn-
ing 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. 
We recommend that you install sediment trap in 
supply line as shown in Figure 14. 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 14 - Gas Connection
*  Purchase  the  optional  CSA  design-certified 
equipment shutoff valve from your dealer. See 
Accessories, page 31.
** Min. inlet pressure for purpose of input adjustment.
  Tee  Cap  Pipe
  Joint    Nipple
3" Min.
Sediment Trap
Gas 
Regulator
CSA Design-Certified 
Equipment Shutoff Valve 
With 1/8" NPT Tap*
Approved 
Flexible 
Gas Hose (if 
allowed by 
local codes)
Natural
From Gas Meter 
(5" W.C.** to 
10.5" W.C. 
Pressure)
Propane/LP
From External 
Regulator
(11" W.C.** 
to 14" W.C. 
Pressure
Propane/LP 
Supply Tank
External 
Regulator
Vent 
Pointing 
Down

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113101-01C 15
INSTALLATION
Continued
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  commercial  leak  de-
tection  solution  to  all  joints. 
Bubbles  forming  show  a  leak. 
Correct all leaks at once.
  CAUTION:  For  propane/LP 
units, make sure external regula-
tor  has  been  installed  between 
propane/LP  supply  and  heater. 
See guidelines under Connecting 
to Gas Supply, page 13.
PRESSURE TESTING GAS SUPPLY 
PIPING SYSTEM 
Test Pressures In Excess Of 1/2 PSIG 
(3.5 kPa)
1.  Disconnect appliance with its appliance main 
gas valve (control valve) and equipment shutoff 
valve from gas supply piping. Pressures in ex-
cess 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 a commercial leak detection solution 
to all joints. Bubbles forming show a leak. 
5.  Correct all leaks at once.
6.  Reconnect heater and equipment shutoff valve 
to gas supply. Check reconnected fittings for 
leaks. 
Test Pressures Equal To or Less Than 
1/2 PSIG (3.5 kPa)
1.  Close equipment shutoff valve (see Figure 15).
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  16  or  17). Apply a  commercial 
leak detection solution to all joints. Bubbles 
forming show a leak. 
4.  Correct all leaks at once.
Figure 15 - Equipment Shutoff Valve
Equipment Shutoff Valve
Propane/LP 
Supply Tank
Control Valve 
Location
Figure 17 - Checking Gas Joints  
(Natural Gas Only)
Gas 
Meter
Equipment Shutoff Valve
Control Valve Location
Figure 16 - Checking Gas Joints 
(Propane/LP Gas Only)
Open
Closed
Equipment 
Shutoff Valve

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16
Pressure Testing Heater Gas 
Connections
1.  Open equipment shutoff valve (see Figure 15, 
page 15).
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 gas meter (natural gas) 
or  propane/LP  supply  to  equipment  shutoff 
valve (see Figure 16 or 17, page 15). Apply 
a  commercial  leak  detection  solution  to  all 
joints. Bubbles forming show a leak.
5.  Correct all leaks at once.
6.  Light heater (see Operating Heater, page 18 
[manually-controlled  models]  or  page  21 
[thermostatically-controlled models]). Check 
all other internal joints for leaks.
7.  Turn off heater (see To Turn Off Gas to Appli-
ance, page 20 [manually-controlled models] or 
page 22 [thermostatically-controlled models]).
INSTALLING LOGS, MODELS 
CGS2718PA, CGS2718NA, 
CGS3124PA, CGS3124NA, 
SGS3124PA AND SGS3124NA
 WARNING: Failure to position 
the parts in accordance with these 
diagrams  or  failure  to  use  only 
parts specifically approved with 
this heater may result in property 
damage or personal injury.
  CAUTION:  After  installa-
tion and periodically thereafter, 
check  to  ensure  that  no  flame 
comes in contact with any log. 
With the heater set to High, check 
to see if flames contact any log. If 
so, reposition logs according to 
the log installation instructions 
in this manual. Flames contact-
ing logs will create soot.
INSTALLATION
Continued
Each log is marked with a number. These numbers 
will help you identify the log when installing. It 
is very important to install these logs exactly as 
instructed.  Do  not  modify  logs.  Only  use  logs 
supplied with heater.
1.  Locate pegs on the bottom of back log (#1). 
Slide these pegs into the holes in the grate base 
behind the burner (see Figure 18).
2.  Locate the notches on the back of the front log 
(#2). Slide these notches over the tabs of the 
grate base (see Figure 19).
3.  Locate  the  holes  in  the  bottom  of  the  left 
crossover log  (#3).  Place crossover  log  on 
pegs on left of the back log and front log (see 
Figure 20, page 17).
4.  Locate  the  holes  in  the  bottom  of  the  right 
crossover  log  (#4).  Place  crossover  log  on 
pegs  on  right  of  the  back  log  and front  log 
(see Figure 20, page 17).
5.  Add lava rock around base of heater if desired. 
Do not place lava rock on logs or burner.
Figure 18 - Installing Back Log
Back Log (#1)
Hole 
Figure 19 - Installing Front Log
Front 
Log (#2)
Notch 
Tabs of 
Grate Base 

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113101-01C 17
Figure 20 - Installing Crossover Logs
Crossover 
Log (#3)
Pegs
INSTALLATION
Continued
INSTALLING LOGS, MODELS 
CLD3018PTA, CLD3018NTA, 
CLD3924PTB AND CLD3924NTB
 WARNING: Failure to position 
the parts in accordance with these 
diagrams  or failure to  use only 
parts specifically approved with 
this heater may result in property 
damage or personal injury.
  CAUTION:  After  installa-
tion and periodically thereafter, 
check  to  ensure  that  no  flame 
comes in contact with any log. 
With the heater set to High, check 
to see if flames contact any log. If 
so, reposition logs according to 
the log installation instructions 
in this manual. Flames contact-
ing logs will create soot.
Each log is marked with a number. These numbers 
will help you identify the log when installing. It 
is very important to install these logs exactly as 
instructed.  Do  not  modify  logs.  Only  use  logs 
supplied with heater.
1.  Place the base of the middle log (#1) in the 
U-shaped slots of the grate base. The cutout 
on the right of the middle log should fit over 
the burner (see Figure 21). Make sure the front 
of the middle log is resting on the tabs of the 
grate base and the cutout area is centered over 
the burner “U” bend.
2.  Locate pegs on the bottom of back log (#2). 
Slide these pegs into the holes in the grate base 
behind the burner (see Figure 22).
3.  Slide log (#3) over left end of log (#4). Place 
these logs on the grate fingers. Make sure the 
notches of the front log line up with the grate 
fingers (see Figure 23, page 18).
Figure 21 - Installing Middle Log (#1)
Middle Log (#1)
Tab
Burner
“U” Bend
U-Shaped Slot
Figure 22 - Installing Back Log (#2)
Hole in Grate 
Base
Back Log 
(#2)
Peg
Burner
Crossover 
Log (#4)
Pegs

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18
4.  Place crossover log (#5) onto the pin (left) on 
middle log (#1) and onto the pin on front left 
log (#3) (see Figure 24).
5.  Place crossover log #6 onto the pin (right) 
on middle log (#1) and onto the pin on back 
log (#2) (see Figure 24).
6.  Place crossover log (#7) onto pin on crossover 
log  #6  and  pin  on  right  front  log  (#4)  (see 
Figure 25).
5.  Add  lava  rock  around  base  of  heater  if  de-
sired. Do not place any lava rock on logs or 
burner.
INSTALLATION
Continued
Grate Fingers
Figure 23 - Installing Front Logs  
(#3 and #4)
Figure 24 - Installing Crossover Logs  
(#5 and #6)
Crossover 
Log (#5)
OPERATING HEATER
MANUALLY-CONTROLLED 
MODELS
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. 
Log #4
Log #3
Crossover 
Log (#6)
Figure 25 - Installing Crossover Log (#7)
Crossover 
Log (#7)

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113101-01C 19
LIGHTING 
INSTRUCTIONS
 WARNING:
•  If  fireplace  has  glass  doors, 
never operate this heater with 
glass doors closed. If you op-
erate heater with doors closed, 
heat  buildup  inside fireplace 
will cause glass to burst. Make 
sure there are no obstructions 
across openings of fireplace.
•  You must operate this heater 
with  a  fireplace  screen  in 
place.  Make  sure  fireplace 
screen  is  closed  before  run-
ning heater. 
NOTICE: During initial operation 
of new heater, burning logs will 
give off a paper-burning smell. 
Orange flame will also be pres-
ent. Open damper or window to 
vent smell. This will only last a 
few hours. 
Note:  Home  owners  generally  prefer  to  op-
erate  their  heater  with  the  chimney  damper 
closed. This will put all the heat into the room. 
However,  there  may  be  times  you  will  desire 
the full flames of the HI  heat  setting but will 
find  the  heat  output  excessive. You  can  open 
the chimney damper (if you have one) fully or 
partially to release some of the heat.
  WARNING: Damper  handle 
will  be  hot  if  heater  has  been 
running.
1.  STOP! Read the safety information page 18, 
column 2.
2.  Make  sure  equipment  shutoff  valve  is 
fully open.
3.  Press in and turn control knob clockwise 
 to the OFF position.
OPERATING HEATER
Continued
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  page  18,  column  2.  If 
you donʼt smell gas, go to the next step.
5.  Slightly depress  and  turn  control  knob 
counterclockwise    to  the  PILOT 
position. Press in control knob for five (5) 
seconds (see Figure 26). 
 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  pi-
lot. The pilot is attached to the burner. If 
needed, keep pressing ignitor button until 
pilot lights.
 Note:  If  pilot  does  not stay  lit,  contact a 
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 20.
7.  Keep control knob pressed in for 30 seconds 
after lighting pilot. After 30 seconds, release 
control knob.
 Note:  If  pilot  goes  out,  repeat steps  3 
through 7. 
•  If control knob does not pop out when 
released, contact  a  qualified  service 
person or gas supplier for repairs.
8.  Slightly depress and turn control knob coun-
terclockwise   to desired heating level. 
The burner should light. Set control knob 
to any heat level between HI and LO.
  WARNING:  Do  not  operate 
heater between PILOT and HIGH 
positions. 
Figure 26 - Control Knob and Ignitor 
Button Location
PILOT
OFF
LO
HI
Ignitor Button Control Knob

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20
Figure 27 - Pilot
Thermocouple
Ignitor 
Electrode Pilot Burner
VARIABLE CONTROL 
OPERATION
The  variable  control valve  can  be  set  to  any 
heat setting and flame height desired, by simply 
turning  the  control  knob  until  that  setting  is 
attained. Even the lowest setting provides re-
alistic, dancing yellow flames. Selecting higher 
settings  produces greater heat  output.  This 
results in increased heating comfort.
 CAUTION: Do not try to ad-
just heating levels by using the 
equipment shutoff valve.
TO TURN OFF GAS 
TO APPLIANCE
Shutting Off Heater
1.  Press in and turn control knob clockwise 
 to the HI position.
2.  Turn control knob clockwise   to the 
pilot position.
3.  Press in control knob and turn clockwise 
 to the OFF position. 
Shutting Off Burners Only (pilot stays lit)
1.  Turn control knob clockwise   to the 
HI position.
2.  Press in and turn control knob clockwise 
 to the pilot position.
Propane/LP
Natural Gas
OPERATING HEATER
Continued
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.
THERMOSTATICALLY-
CONTROLLED MODELS
MANUAL LIGHTING 
PROCEDURE
1.  Follow  steps  1  through  5  under  Lighting 
Instructions, page 19.
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  under 
Lighting Instructions, page 19.
Thermocouple
Ignitor Electrode Pilot Burner

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113101-01C 21
LIGHTING 
INSTRUCTIONS
 WARNING
•  If  fireplace  has  glass  doors, 
never operate this heater with 
glass doors closed. If you op-
erate heater with doors closed, 
heat  buildup  inside fireplace 
will cause glass to burst. Make 
sure there are no obstructions 
across openings of fireplace.
•  You must operate this heater 
with a fireplace screen in place. 
Make sure fireplace screen is 
closed before running heater. 
NOTICE: During initial operation of 
new heater, burning logs will give 
off a paper-burning smell. Orange 
flame will also be present. Open 
damper or window to vent smell. 
This will only last a few hours. 
Note:  Home  owners  generally  prefer to  op-
erate  their  heater  with  the  chimney  damper 
closed. This will put all the heat into the room. 
However,  there  may  be  times  you  will  desire 
the full flames of the HI  heat  setting but will 
find  the  heat  output  excessive. You  can  open 
the chimney damper (if you have one) fully or 
partially to release some of the heat. 
 WARNING: Damper handle will 
be hot if heater has been running.
1.  STOP!  Read  the  safety  information, 
page 20, column 2.
2. 
Make sure equipment shutoff valve is fully open.
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,  page 20,  column 2.  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 28). 
OPERATING HEATER
Continued
 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.
•  If control knob does not pop out when 
released, contact  a  qualified  service 
person or gas supplier for repairs.
6. 
With control knob pressed in, press and release 
ignitor button. 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 22. 
7.  Keep control knob pressed in for 30 seconds 
after lighting pilot. After 30 seconds, release 
control knob.
 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.
LO
HI
OFF
Pilot
Figure 28 - Control Knob and Ignitor 
Button Location
Control Knob
Ignitor Button
Figure 29 - Pilot
Ignitor 
Electrode Pilot Burner
Propane/LP
Natural Gas
Ignitor 
Electrode
Thermocouple

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22
OPERATING HEATER
Continued
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 on page 21.
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  under 
Lighting Instructions, page 21. 
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in 
the fitting at the entrance to the burner. These holes 
may become blocked with dust or lint. Periodically 
inspect these holes for any blockage and clean as 
necessary. Blocked air holes will create soot.
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.
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat-
terns often.
PILOT FLAME PATTERN
Figure  30  shows  a  correct  pilot  flame  pattern. 
Figure  31  shows  an  incorrect  pilot  flame  pat-
tern. 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.
Figure 30 - Correct Pilot Flame Pattern
Figure 31 - Incorrect Pilot Flame Pattern
Pilot Burner
Thermocouple
Pilot Burner
Propane/LP Natural Gas
Pilot Burner Pilot Burner
Thermocouple
Propane/LP Natural Gas
If pilot flame pattern is incorrect, as shown in 
Figure 31
•  turn heater off (see To Turn Off Gas to Appli-
ance, page 20 [manually-controlled models] or 
page 22 [thermostatically-controlled model])
•  see Troubleshooting, page 25
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. 

www.desatech.com
113101-01C 23
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 quali-
fied service person. Heater may 
need more frequent cleaning due 
to excessive lint from carpeting, 
bedding material, pet hair, etc.
  WARNING:  Failure  to  keep 
the  primary  air  opening(s)  of 
the burner(s) clean may result in 
sooting and property damage.
ODS/PILOT AND BURNER
•  Use  a  vacuum  cleaner  or  small,  soft  bristled 
brush to clean.
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 
and lint. 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  using 
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 com-
pressed air in a can, please follow the directions on 
the can. If you donʼt follow directions on the can, 
you could damage the pilot assembly.
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 32).
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 33). 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 32 - Injector Holder On Outlet 
Burner Tube
Burner Tube
Primary Air Inlet Holes 
(Shape of Holes May 
Vary by Model)
Injector Holder (May 
Be Brass or Aluminum 
Depending on Model)
Figure 33 - Pilot Inlet Air Hole
Burner 
Tube
Ports/Slots
Pilot 
Assembly
Pilot Air 
Inlet Hole

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24
LOGS
•  If you remove logs for cleaning, refer to Install-
ing Logs, page 16, to properly replace logs.
•  Replace log(s) if broken or chipped (dime-sized 
or larger).
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the 8 holes 
in the brass fitting at the entrance to the burner. 
These holes may become blocked with dust or lint. 
Periodically inspect these holes for any blockage 
and  clean  as  necessary.  Blocked  air  holes  will 
create soot.
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.
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.
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, con-
tact your local natural or propane/LP gas supplier.
CLEANING AND 
MAINTENANCE
Continued
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),  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

www.desatech.com
113101-01C 25
TROUBLESHOOTING
 WARNING: Turn off and unplug 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.  Piezo ignitor nut is loose
4.  Broken ignitor cable
5.  Bad piezo ignitor
6.  Ignitor electrode broken
7. 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  in-
stalled
5.  Depleted gas supply (propane/
LP only)
6.  ODS/pilot is clogged
7. Gas  regulator  setting is  not 
correct
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
REMEDY 
1.  Reconnect ignitor cable
2.  Free  ignitor  cable  if  pinched 
by any metal or tubing. Keep 
ignitor cable dry
3. 
Tighten  nut  holding piezo ig-
nitor to base panel of log set. Nut 
is located behind base panel
4.  Replace ignitor cable
5.  Replace piezo ignitor 
6.  Replace pilot assembly
7.  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.  Contact local propane/LP gas 
company
6.  Clean ODS/pilot (see Cleaning 
and Maintenance, page 23) or 
replace ODS/pilot assembly
7.  Replace gas regulator

www.desatech.com 113101-01C
26
TROUBLESHOOTING
Continued 
OBSERVED PROBLEM
ODS/pilot lights but flame goes 
out  when  control  knob  is  re-
leased
Burner does light after ODS/pi-
lot is lit
Delayed ignition of burner
Burner  backfiring  during  com-
bustion
REMEDY
1.  Press in control knob fully
2.  After ODS/pilot lights, keep con-
trol knob pressed in 30 seconds
3.  Wait one minute for safety in-
terlock system to reset. Repeat 
ignition operation
4.  Fully open equipment shutoff 
valve
5.  A)  Contact  local  natural  or 
propane/LP gas company 
  B)  Clean  ODS/pilot  (see 
Cleaning  and  Maintenance, 
page 23) or replace ODS/pilot 
assembly 
6.  Hand tighten until snug, then 
tighten 1/4 turn more
7.  Replace pilot assembly
8.  Replace control valve
1. Clean  burner  (see  Cleaning 
and Maintenance, page 23) 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 23) or 
replace burner orifice
1. Clean  burner  (see  Cleaning 
and Maintenance, page 23) or 
replace burner orifice
2.  Replace damaged burner
3.  Replace gas regulator
POSSIBLE CAUSE
1.  Control knob not fully pressed 
in
2. Control  knob  not  pressed  in 
long enough
3.  Safety  interlock  system  has 
been triggered
4.  Equipment  shutoff valve  not 
fully open
5.  Pilot flame not touching ther-
mocouple, which allows ther-
mocouple  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 
6. Thermocouple connection 
loose at control valve 
7.  Thermocouple damaged
8.  Control valve damaged
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

www.desatech.com
113101-01C 27
TROUBLESHOOTING
Continued 
OBSERVED PROBLEM
Slight smoke or odor during initial 
operation
Moisture/condensation  noticed 
on windows
Heater produces a whistling noise 
when burner is lit
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
REMEDY
1. Check  burner  for  dirt  and 
debris. If found, clean burner 
(see  Cleaning  and  Mainte-
nance, page 23)
2.  Replace gas regulator
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 posi-
tion  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 23) or 
replace burner orifice
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
POSSIBLE CAUSE
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. When  heated,  vapors  from 
furniture  polish,  wax,  carpet 
cleaners, etc. may turn into a 
white powder residue
1.  Metal expanding while heating 
or contracting while cooling

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28
OBSERVED PROBLEM
Heater  produces  unwanted 
odors
Heater  shuts  off  in  use  (ODS 
operates)
Gas odor even when control knob 
is in OFF position
Gas odor during combustion
Log set cycles to pilot, but room 
temperature drops to a lower than 
ideal level before log set comes 
back on
POSSIBLE CAUSE
1.  Heater  burning  vapors  from 
paint, hair spray, glues, clean-
ers,  chemicals,  new  carpet, 
etc. (See IMPORTANT state-
ment above)
2.  Low fuel supply (propane/LP 
only)
3. Gas  leak.  See  Warning 
statement above
1.  Not enough fresh air is avail-
able
2.  Low line pressure
3.  O D S / p i l o t   i s   p a r t i a l l y 
clogged
1. Gas  leak.  See  Warning 
statement above
2.  Control valve defective
1.  Foreign matter between con-
trol valve and burner
2. Gas  leak.  See  Warning 
statement above
1.  Thermostat sensing bulb needs 
to be repositioned
REMEDY
1. 
Open  window  and  ventilate 
room. Stop using odor caus-
ing  products  while  heater  is 
running
2.  Refill supply tank (propane/LP 
only)
3. Locate  and  correct  all  leaks 
(see  Checking  Gas  Connec-
tions, page 15)
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 23)
1. Locate  and  correct  all  leaks 
(see  Checking  Gas  Connec-
tions, page 15)
2.  Replace control valve
1. Take  apart  gas  tubing  and 
remove foreign matter
2.  Locate and correct all leaks (see 
Checking  Gas  Connections, 
page 15)
1.  Reposition thermostat sensing 
bulb (see Optional Positioning 
of  Thermostat  Sensing  Bulb, 
page 29
TROUBLESHOOTING
Continued 
 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.
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. 

www.desatech.com
113101-01C 29
OPTIONAL POSITIONING 
OF THERMOSTAT 
SENSING BULB
FOR MASONRY AND FACTORY-
BUILT METAL FIREPLACE
If your log set cycles to pilot, but the room tem-
perature drops to a lower than ideal comfort level 
before the log set comes back on, you may want 
to reposition the thermostat sensing bulb.
The thermostat  sensing  bulb  is  located near  the 
gas  valve  assembly  on  the  mounting  bracket. 
This  location  allows  the  thermostat  to  keep  the 
room  temperature  at  an  ideal  comfort  level  for 
most  fireplace  applications.  For  positioning  the 
thermostat sensing bulb elsewhere, an adhesive-
backed mounting clip is available. 
Tools needed: 1/4" hex driver or socket 
1.  Remove logs. Locate the gas valve assembly 
and thermostat sensing bulb (see Figure 34). 
2.  With  1/4"  hex  driver  or  socket,  loosen  the 
thermostat screw. Carefully slide the thermostat 
sensing  bulb out of the retaining clamp (see 
Figure 36). 
 Note: Do not remove the screw. Make sure 
you  tighten  the  screw  after  removing  the 
thermostat sensing bulb. 
 IMPORTANT:  Do  not  force  or  bend  the 
thermostat sensing bulb or capillary. 
3.  The thermostat sensing bulb may be located to 
the lower right front side of fireplace. Determine 
location of sensing bulb, but do not mount sens-
ing bulb until step 4. If you have a masonry fire-
place, see Figure 37 for location. If you have 
a factory-built metal fireplace, see Figure 38 
for location. If your fireplace has glass doors, 
position sensing bulb directly behind door gap 
on right bottom side (see Figure 39).
Thermostat 
Sensing Bulb 
Figure 34 - Location of Gas Valve 
Assembly and Thermostat Sensing Bulb 
Gas Valve 
Assembly 
Mounting 
Bracket 
Figure 35 - Adhesive-backed Mounting Clip 
Figure 36 - Removing Thermostat 
Sensing Bulb 
Thermostat 
Screw
Thermostat 
Sensing 
Bulb 
Capillary
Retaining 
Clamp 
Adhesive-backed 
Mounting Clip 
Figure 37 - Locating Thermostat Sensing 
Bulb on Masonry Fireplace 
Thermostat 
Sensing Bulb 
Thermostat 
Sensing Bulb 
Figure 38 - Locating Thermostat Sensing 
Bulb on Factory-built Metal Fireplace 
Adhesive-backed 
Mounting Clip 
Glass Doors 
Figure 39 - Installing Thermostat Sensing 
Bulb behind Glass Doors 
Thermostat 
Sensing Bulb 
Adhesive-
backed 
Mounting Clip 

www.desatech.com 113101-01C
30
SPECIFICATIONS
    18" Model  18" Model  24" Model  24" Model
    (CGS2718PA)  (CLD3018PTA)  (CGS3124PA)  (CLD3924PTB)
        (SGS3124PA) 
Btu (Variable)  16,000/27,000  18,000/30,000  16,000/31,500  20,000/39,000
Type Gas  Propane/LP  Propane/LP  Propane/LP  Propane/LP
Ignition  Piezo  Piezo  Piezo  Piezo 
Manifold Pressure  8.0" W.C.  8.0" W.C.  8.0" W.C.  8.0" W.C.
Inlet Gas Pressure (in. of water)
  Maximum  14"  14"  14"  14"   
  Minimum*  11"  11"  11"  11" 
Shipping Weight  27 lbs.  27 lbs.  29lbs.  27 lbs. 
* For the purpose of input adjustment
    18" Model  18" Model  24" Model  24" Model
    (CGS2718NA)  (CLD3018NTA)  (CGS3124NA)  (CLD3924NTB)
        (SGS3124NA)
Btu (Variable)  16,000/27,000  18,000/30,000  16,000/31,500  20,000/39,000
Type Gas  Natural Gas  Natural Gas  Natural Gas  Natural Gas
Ignition  Piezo  Piezo  Piezo  Piezo 
Manifold Pressure  3.5" W.C.  3.5" W.C.  3.5" W.C.  3.5" W.C.
Inlet Gas Pressure (in. of water)   
  Maximum  10.5"  10.5"  10.5"  10.5"   
  Minimum*  5"   5"  5"  5" 
Shipping Weight  27 lbs.  27 lbs.  29 lbs.  29 lbs  
* For the purpose of input adjustment
4.  The mounting clip must be a minimum of 3" 
from bottom of fireplace to prevent crimping 
of  capillary.  Once  you  have  decided  on  a 
location, clean the area thoroughly. Remove 
the paper backing from the adhesive on back 
of mounting clip. Press the clip into the new 
location so that the thermostat sensing  bulb 
will be  positioned  vertically with  the capil-
lary at the bottom (see Figure 40). Slide the 
thermostat sensing bulb into the clip.
 IMPORTANT: Do not crimp capillary. 
 OPTIONAL POSITIONING 
OF THERMOSTAT 
SENSING BULB
Continued 
Capillary 
Thermostat 
Sensing Bulb 
Do Not Crimp 
Capillary 
Adhesive-
backed 
Mounting Clip 
Figure 40 - Positioning the Thermostat 
Sensing Bulb in the Vertical Position 
with the Capillary at the Bottom 

www.desatech.com
113101-01C 31
PARTS CENTRAL
These Parts Centrals are privately owned businesses. They have agreed to support our customerʼs needs 
by providing original replacement parts and accessories.
Tool & Equipment, Co.
5 Manila Ave
Hamden, CT 06514-0322
1-800-397-7553
203-248-7553
Parts Department
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383-9704
All States 
219-462-7441
1-888-619-7060
sales@portableheaterparts.com
techservice@portableheaterparts.com
FBD
1349 Adams Street
Bowling Green, KY 42103-3414
270-846-1199
1-800-654-8534
Fax: 1-800-846-0090
franktalk@aol.com
Master Parts Dist.
1251 Mound Ave. NW
Grand Rapids, MI 49504-2672
616-791-0505
1-800-446-1446
Fax: 616-791-8270
www.nbmc.com
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108-2195
KS, MO, AR
816-842-3911
www.washerparts.com
East Coast Energy Products 
707 Broadway
W. Long Branch, NJ 07764-1542
732-870-8809
1-800-755-8809
www.njplaza.com/ecep
21st Century
2950 Fretz Valley Road
Perkasie, PA 18944-4034
215-795-0400
800-325-4828
Laporte’s Parts & Service
2444 N. 5th Street
Hartsville, SC 29550-7704
843-332-0191
Parts Department
Cans Unlimited, Inc. 
P.O. Box 645
Taylor, SC 29687-0013
All States 
803-879-3009
1-800-845-5301
cuisales@aol.com
ACCESSORIES
Purchase these  fireplace  accessories from  your 
local dealer. If they can not supply these acces-
sories, either contact your nearest Parts Central or 
call DESA Heating Productsʼ Sales Department 
at  1-866-672-6040  for  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.
DAMPER CLAMP - GA6080 
(Not Shown)
For variably-controlled  models.  Permanently 
opens chimney flue damper for vented operation.
FIREPLACE HOOD
Black - GA6050
Brass - GA6052
Antique Brass - GA6053
For all  models.  Helps  deflect  heat  away  from 
mantel or wall above fireplace.
LAVA ROCK - GA6060 
(Not Shown)
For all  models.  Order  when  additional  rock  is 
desired. (2 lb. bag).
INFORMATION VIDEO - 108917-01
For all models. A care and maintenance video is 
available  by  calling  1-866-672-6040.  You  may 
also email your request to
productsupport@desaint.com.

www.desatech.com 113101-01C
32
3
2
18
20
21
19
12
8
9
10
22
19
7
14
6
22
22
17
5
20
15
16
11
13
1
4
ILLUSTRATED PARTS BREAKDOWN
VARIABLE MANUALLY-CONTROLLED WINCHESTER OAK MODELS 
CGS2718NA, CGS2718PA 
CGS3124NA, CGS3124PA 
SGS3124NA, SGS3124PA

www.desatech.com
113101-01C 33
PARTS LIST
VARIABLE MANUALLY-CONTROLLED WINCHESTER OAK MODELS
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions 
listed under Replacement Parts on page 24 of this manual.
  PART NUMBER
KEY  CGS2718N  CGS2718P  CGS3124N  CGS3124P
NO.      SGS3124N  SGS3124P  DESCRIPTION  QTY.
1  113571-02  113571-02  113572-02  113572-02  Back Log (#1)  1
2  113571-01  113571-01  113572-01  113572-01  Front Log (#2)  1
3  113571-03  113571-03  113572-03  113572-03  Left Crossover Log (#3)  1
4  113571-04  113571-04  113572-04  113572-04  Right Crossover Log (#4)  1
5       **       **       **       **  Painted Base Assembly  1
6  102844-01  102844-01  102844-01  102844-01  Lower Bracket  1
7  098276-01  098276-01  098276-01  098276-01 
Hex Head Plug, 1/8" NPT
  1
8  098867-14  098867-10  098867-14  098867-10  Gas Regulator  1
9  111331-04  102780-05  111331-04  102780-05  Outlet Burner Tube  1
10  102798-01  102798-01  102798-01  102798-01  Inlet Tube  1
11  099056-20  099056-21  099056-18  099056-19  Burner Orifice Injector  1
12  111124-01  111124-01  111124-01  111124-01  Burner Retainer Spring  1
13  102963-02  102963-02  102773-03  102773-03  Burner  1
14  102568-07  102568-08  102568-07  102568-08  Control Valve  1
15  098508-01  098508-01  098508-01  098508-01  Valve Retainer Nut  1
16  098354-01  098354-01  098354-01  098354-01  Control Knob  1
17  102445-01  102445-01  102445-01  102445-01  Piezo Ignitor  1
18  098249-01  098249-01  098249-01  098249-01  Nut, M5  2
19  099387-08  099387-08  099387-08  099387-08  Pilot Tube  1
20  098271-10  098271-10  098271-10  098271-10  Ignitor Cable  1
21  104285-01  104286-01  104285-01  104286-01  ODS Pilot  1
22  M11084-38  M11084-38  M11084-38  M11084-38  Screw, Hex Head 
            (#8-18 x .38)  8
PARTS AVAILABLE — NOT SHOWN
  100563-01  100563-01  100563-01  100563-01  Warning Plate  1
  101055-02  101055-02  101055-02  101055-02 
Lighting Instructions Plate
  1
  100565-01  100565-01  100565-01  100565-01  Warning Plate Fastener   1
  100639-01  100639-01  100639-01  100639-01  Caution Decal  1
  101449-04  101449-04  101449-04  101449-04  Control Position Decal  1
  101137-02  101137-02  101137-02  101137-02  Hardware Kit  1
  GA6060  GA6060  GA6060  GA6060  Lava Rock  1
** Not a field replaceable part.

www.desatech.com 113101-01C
34
ILLUSTRATED PARTS BREAKDOWN
THERMOSTATICALLY-CONTROLLED ROYAL ENGLISH OAK MODELS 
CLD3924NTB, CLD3924PTB 
CLD3018NTA, CLD3018PTA
15
21
19
20
23
13
12
8
14
10
9
22
11
24
16
22
17
22
22
25
18
20
22 
1
2
3
4
5
76

www.desatech.com
113101-01C 35
PARTS LIST
THERMOSTATICALLY-CONTROLLED ROYAL ENGLISH OAK MODELS
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions 
listed under Replacement Parts on page 24 of this manual.
KEY  PART NUMBER
NO.  CLD3924NTB  CLD3924PTB  CLD3018NTA 
CLD3018PTA
  DESCRIPTION  QTY.
1  117230-05  117230-05  117230-02  117230-02  Middle Log (#1)  1
2  117230-04  117230-04  117230-01  117230-01  Rear Log (#2)  1
3  117230-06  117230-06  117230-03  117230-03  Right Front Log (#3)  1
4  117230-07  117230-07  117230-07  117230-07  Left Front Log (#4)  1
5  117230-08  117230-08  117230-08  117230-08  Left Top Log (#5)  1
6  117230-10  117230-10  117230-10  117230-10  Right Top Log (#6)  1
7  117230-09  117230-09  117230-09  117230-09  Middle Top Log (#7)  1
8  102844-01  102844-01  102844-02  102844-02  Lower Bracket  1
9  098867-14  098867-10  098867-14  098867-10  Gas Regulator  1
10  102981-01  102981-01  102981-01  102981-01  Inlet Tube  1
11  102983-01  102983-01  111331-08  102983-06  Outlet Burner Tube  1
12  099056-16  099056-17  099056-18  099056-19  Burner Orifice Injector  1
13  111124-01  111124-01  111124-01  111124-01 
Burner Retainer Spring
  1
14  102772-01  102772-01  102980-01  102980-01  Burner  1
15  101329-20  101329-19  101329-21  101329-30  Thermostat Gas 
             Valve Assembly   1
16  102979-01  102979-01  102979-01  102979-01  Thermostat Bracket  1
17  098544-01  098544-01  098544-01  098544-01  Thermobulb Clip   1
18  102445-01  102445-01  102445-01  102445-01  Piezo Ignitor  1
19  099387-09  099387-09  099387-09  099387-09  Pilot Tube  1
20  098271-10  098271-10  098271-10  098271-10  Ignitor Cable  1
21  104285-01  104286-01  104285-01  104286-01  ODS Pilot  1
22  M11084-38  M11084-38  M11084-38  M11084-38 
Hex Screw, #8-18 x .38
   13
23  098249-01  098249-01  098249-01  098249-01  Nut, M5  2
24  099211-01  099211-01  099211-01  099211-01 
Hex Screw, 10-16 x 2.50
  2
25       **       **       **       ** 
Painted Base Assembly
  1
PARTS AVAILABLE — NOT SHOWN
  100563-01  100563-01  100563-01  100563-01  Warning Plate  1
  101054-01  101054-01  101054-01  101054-01  Lighting Instructions 
             Plate  1
  100565-01  100565-01  100565-01  100565-01 
Warning Plate Fastener
   1
  100639-02  100639-02  100639-02  100639-02  Caution Decal  1
  101137-02  101137-02  101137-02  101137-02  Hardware Kit  1
  GA6060  GA6060  GA6060  GA6060  Lava Rock  1
** Not a field replaceable part.

2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
113101-01
Rev. C
06/05
NOT A UPC
WARRANTY INFORMATION
KEEP THIS WARRANTY
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our 
standard written warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTY 
VENT-FREE GAS FIREPLACE
DESA Heating Products warrants this product to be free from defects in materials and components for two (2) 
years from the date of first purchase, provided that the product has been properly installed, operated and maintained 
in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or cancelled 
check must be presented.
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required 
to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating 
Products Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product 
and/or DESA Heating Products who will provide original factory replacement parts. Failure to use original factory 
replacement parts voids this warranty. The heater MUST be installed by a qualified installer in accordance with all 
local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that 
fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper 
installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to repairing a 
defective heater will be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE 
OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WAR-
RANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WAR-
RANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO (2) YEARS 
ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATING PRODUCTSʼ 
LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA HEATING 
PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDI-
RECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long  an  implied  warranty  lasts  or  an  exclusion  or  limitation  of 
incidental or consequential damages, so the above limitation on implied warranties or exclusion or limitation on 
damages may not apply to you.
This warranty gives you specific legal rights and you may also have other rights that vary from state to state.
For information about this warranty write:
Model
Serial No. 
Date Purchased
113101 01