Desa CGE3924NR Quick start guide

For more information, visit www.desatech.com
WARNING: If the information in this manual is not


         


— WHAT TO DO IF YOU SMELL GAS
 
• Do not touch any electrical switch; do not use any

• 

 

 -

      

UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL

Not Used With Hand-Held Thermostat Remote
MODELS CGE3924NR
AND CGE3924PR

www.desatech.com 119638-01C2
SAFETy
TABLE OF CONTENTS
Safety .................................................................. 2
Product Identication........................................... 5
Local Codes......................................................... 5
Unpacking............................................................ 5
Air For Combustion and Ventilation..................... 6
Product Features................................................. 6
Installation ........................................................... 9
Operation........................................................... 21
Inspecting Burners............................................. 24
Cleaning and Maintenance................................ 25
Troubleshooting................................................. 26
Specications .................................................... 30
Service Hints ..................................................... 30
Technical Service............................................... 30
Replacement Parts............................................ 30
Wiring Diagram.................................................. 30
Accessories ....................................................... 31
Parts .................................................................. 32
Warranty ..............................................Back Cover
 
 
alteration, service or main-
  

to this manual for correct
-
   -
tance or additional infor-

  

  -
   

masonry or UL127 fac-
    
-
   -

in accordance with ANSI
  
   
 
that includes instructions
-
 

WARNING: This is an
  -
    
from the room in which


and ventilation air must
Air
for Combustion and Ven-
tilation

-
stalled in an aftermarket,*
 
 
-


     
   
   
   




www.desatech.com
119638-01C 3
-

known to the State of California




   
    

    
   
   



   Early signs
of carbon monoxide poisoning resemble the
u, with headaches, dizziness or nausea. If
you have these signs, the heater may not be
working properly.  Have
heater serviced. Some people are more af-
fected by carbon monoxide than others. These
include pregnant women, people with heart or
lung disease or anemia, those under the inu-
ence of alcohol and those at high altitudes.
Natural and
propane/LP gases are odorless. An odor-
making agent is added to the gas. The odor
helps you detect a gas leak. However, the
odor added to the gas can fade. Gas may be
present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this heater.
    
this heater or its controls can

SAFETy
Continued
WARNING: Do not allow fans



    
   

-



    



  
    



    


   
will remain hot for a time after


-
dren when they are in the room
    
   -



    
-
-


www.desatech.com 119638-01C4
SAFETy
Continued
1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP units
only).
3. To prevent performance problems, the
use of a propane/LP fuel tank of less
than 100 lb. 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 neighbor’s phone. Follow the gas
supplier’s instructions
• if you cannot reach your gas supplier,
call the re department
5. This heater shall not be installed in a
bedroom or bathroom unless installed as
a vented appliance (see Installing Damper
Clamp Accessory for Vented Operation,
page 13). This gas log set may not be
installed as a vented appliance in a bed-
room or bathroom in the Commonwealth
of Massachusetts.
6. Before installing in a solid fuel burning re-
place, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.
Creosote will ignite if highly heated. A dirty
chimney ue may create and distribute
soot within the house. Inspect chimney
ue for damage. If damaged, repair ue
before operating heater.
7. Do not burn solid-fuel in a masonry or
UL127 factory-built replace in which a
vent-free room heater is installed.
8. If replace has glass doors, never operate
this heater with glass doors closed. If you
operate heater with doors closed, heat
buildup inside replace will cause glass to
burst. Make sure there are no obstructions
across openings of replace.
9. This log heater is designed to be smoke-
less. If logs ever appear to smoke, turn off
heater and call a qualied service person.
Note: During initial operation, slight smok-
ing may occur due to log curing and heater
burning manufacturing residues.
10. To prevent the creation of soot, follow the
instructions in Cleaning, page 25.
11. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater
off. If heated, the vapors from these prod-
ucts may create a white powder residue
within burner box or on adjacent walls
or furniture.
12. This heater needs fresh, outside air ven-
tilation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if not enough fresh air is available.
See Air for Combustion and Ventilation,
page 6. If heater keeps shutting off, see
Troubleshooting, page 26.
13. Do not run heater
• where ammable 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 ex-
posed to or under water. Immediately call
a qualied service technician to inspect
the room heater and to replace any part
of the control system and any gas control
which has been under water.
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 ser-
vicing, installing or repairing. Make sure
the remote selector switch is in the OFF
position. Only a qualied service person
should install, service or repair heater.
18. Make sure the remote selector switch is
in the OFF position when you are away
from home for long periods of time.
19. This heater must not be connected to any
external electrical source.
20. Operating heater above elevations of
4,500 feet may cause pilot outage.
21. Provide adequate clearances around air
openings.

www.desatech.com
119638-01C 5
PRODUCT IDENTIFICATION
Figure 1 - Vent-Free Gas Log Heater
Remote Control
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes,
use the latest edition of The National Fuel
Gas Code, ANSI Z223/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 operation is not
permitted.
Electronic
Ignitor Button
Ember Bed Burner
Flame
Adjustment Knob Control Knob
5 Piece
Log Set
Remote Sensor
with Switch
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 Commonwealth of Massachusetts.
UNPACkING
CAUTION: Do not remove the




1. Remove logs and heater base assembly
from carton.
Note: Do not pick up heater base assem-
bly by back burner. This could damage
heater.
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.

www.desatech.com 119638-01C6
AIR FOR COMBUSTION AND VENTILATION
PRODUCT FEATURES

This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
realistic dancing, yellow ames. This heater
is designed for vent-free operation with ue
damper closed. It has been tested and ap-
proved to ANSI Z21.11.2 standard for unvented
heaters. This heater may also be operated as
a vented decorative (ANSI Z21.60) product
by opening ue damper (only when used as a
manual control unit - thermostat remote can-
not be used).
ELECTRONIC IGNITION SYSTEM
This heater has an electronic ignitor. This
system requires no matches or other sources
to light heater.

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.
THERMOSTAT REMOTE CONTROL
This heater includes a thermostat remote control
and receiver. When installed, this remote allows
your log set to be used as a thermostat unit. An
On/Off remote is available for purchase (see
Accessories, page 31).
WARNING: This heater shall
     
    -

-


     
  

Today’s homes are built more energy efcient
than ever. New materials, increased insulation
and new construction methods help reduce
heat loss in homes. Home owners weather
strip and caulk around windows and doors
to keep the cold air out and the warm air in.
During heating months, home owners want
their homes as airtight as possible.
While it is good to make your home energy
efcient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning ap-
pliances need fresh air for proper combustion
and ventilation.
Exhaust fans, replaces, clothes dryers and
fuel burning appliances draw air from the
house to operate. You must provide adequate
fresh air for these appliances. This will insure
proper venting of vented fuel-burning appli-
ances.


The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 6 through 8 will help
you classify your space and provide adequate
ventilation.

The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.

construction where:
 -
    

-112
and
 
and

www.desatech.com
119638-01C 7
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: 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 replace __________ Btu/Hr
Gas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/Hr
Other gas appliances* + _________ Btu/Hr
Total = _________ Btu/Hr
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater __________ Btu/Hr
Vent-free replace + __________ Btu/Hr
Total = __________ Btu/Hr
4. Compare the maximum Btu/Hr the space
can support with the actual amount of Btu/Hr
used.
_______ Btu/Hr (maximum the space can
support)
_______ Btu/Hr (actual amount of Btu/Hr
used)
Example: 51,200 Btu/Hr (maximum the
space can support)
79,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a conned space
because the actual Btu/Hr used is more than the
maximum Btu/Hr the space can support. You
must provide additional fresh air. Your options
are as follows:
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides an
unconned space, remove door to adjoining
room or add ventilation grills between rooms.
See Ventilation Air From Inside Building,
page 8.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional
fresh air ventilation.
      
     


    


If your home meets all of the three criteria

  Ventilation Air From Outdoors,

If your home does not meet all of the three
    Determining
Fresh-Air Flow For Heater Location

The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 denes a conned space as a space
whose volume is less than 50 cubic feet per
1,000 Btu per hour (4.8 m3 per kw) of the ag-
gregate input rating of all appliances installed in
that space and an unconned space as a space
whose volume is not less than 50 cubic feet per
1,000 Btu per hour (4.8 m3 per kw) of the ag-
gregate input rating of all appliances installed in
that space. Rooms communicating directly with
the space in which the appliances are installed*,
through openings not furnished with doors, are
considered a part of the unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
DETERMINING FRESH-AIR FLOW



Use this work sheet to determine if you have
a conned or unconned space.
 Includes the room in which you will
install replace plus any adjoining rooms with
doorless passageways or ventilation grills be-
tween 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.
40,000
39,000
79,000
AIR FOR COMBUSTION AND VENTILATION
Continued

www.desatech.com 119638-01C8
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
AIR FOR COMBUSTION AND VENTILATION
Continued

Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
and one within 12" of the oor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
WARNING: If the area in
-


    



in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54  -



This fresh air would come from an adjoining
unconned space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the oor on the
wall connecting the two spaces (see options
1 and 2, Figure 2). You can also remove door
into adjoining room (see option 3, Figure 2).
Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
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"

www.desatech.com
119638-01C 9
INSTALLATION
NOTICE: This heater is intended
    


     -








NOTICE: Stateorlocalcodesmay
-
    

 -


WARNING: If hand-held
-
stalled, make sure the selector
     



    
-

-


    



WARNING: Seal any fresh
air vents or ash clean-out doors
-

     
   

WARNING: Never install the
heater
     
unless installed as a vented

• in a recreational vehicle
• where curtains, furniture,
   




 
• in windy or drafty areas
CAUTION: This heater cre-
    
currents move heat to wall sur-
    
heater next to vinyl or cloth wall
   


-

the air exist, may discolor walls

IMPORTANT: Vent-free heaters add moisture
to the air. Although this is benecial, installing
heater in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventila-
tion, page 6.

www.desatech.com 119638-01C10

Use the correct gas type (natural or propane/
LP) for your unit. If your gas supply is not cor-
rect, do not install heater. Call dealer where
you bought heater for proper type heater.
   
    


    

INSTALLATION AND CLEARANCES

WARNING: Maintain the



-
: Side Wall 16", Ceiling 42"
  : Height 17", Depth
13", Front Width 28", Rear Width 21"*
*Measured at 13" depth.
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured replace or listed
vent-free rebox.


A. Clearances from the side of the replace
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 com-
bustible material must be 4" from the side
of the replace opening (see Figure 4).
Note: When installing your gas logs into
a manufactured rebox, follow rebox
manufacturer’s instructions for minimum
clearances to combustible materials.
B. Clearances from the top of the replace
opening to the ceiling should not be less
than 42".
INSTALLATION
Continued
NOTICE: Manual control heaters

If so, you must always run heater


  

Go to Installing Damper Clamp
Accessory for Vented Operation,

Figure 4 - Minimum Clearance for Side
Combustible Material, Side Wall and
Ceiling
*Minimum 16" from Side Wall
*
Example

MATERIAL CLEARANCES

Note: If using a mantel, proceed to If Using
Mantel, page 11. If not using a mantel, follow
the information below.
You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,
you must have noncombustible material be-
hind it. Noncombustible material must extend
at least 8" up. If noncombustible material is
less than 12", you must install the replace
hood accessory. See Figure 5, page 11 for
minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney ue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 13.