BLUE FLAME VENT -FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
®
10,000 and 6,000 Btu/Hr Manually Controlled Models:
CGN10L and CGN6L
WARNING: If the information in this manual is
not followed 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 qualified installer, service agency, or the
gas supplier.
WARNING: This is an
unvented gas-fired heater.
It uses air (oxygen) from
the room in which it is
installed. Provisions for
adequate combustion
must be provided. Refer to
page 5 of this manual
This appliance may be installed in an aftermarket*
manufactured (mobile) home,
where not prohibited by state
or local codes.
* Aftermarket: Completion of sale,
not for purpose of resale, from the
manufacturer
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.
Save this manual for future reference.
CONTENTS
SECTION PAGE
Safety Information.........................................................................2
Product Identification .................................................................... 4
Local Codes ................................................................................... 4
Unpacking......................................................................................4
Product Features ............................................................................ 4
Fresh Air For Combustion And Ventilation .................................. 5
Installing To Wall..........................................................................9
Connecting To Gas Supply............................................................13
Checking Gas Connections............................................................14
Operating Heater ...........................................................................16
Inspecting Burner ..........................................................................18
Cleaning And Maintenance ........................................................... 20
Troubleshooting.............................................................................20
Technical Service .......................................................................... 24
Specifications ................................................................................24
Service Hints .................................................................................24
Replacement Parts ......................................................................... 24
Parts Centrals.................................................................................25
Service Publications ......................................................................25
Accessory ......................................................................................25
Illustrated Parts Breakdown ..........................................................26
Parts List ........................................................................................ 27
Warranty Information .................................................................... Back Cover
SAFETY
INFORMATION
W ARNINGS
IMPORTANT: Read this owner’s manual carefully and completely before
trying to assemble, operate, or service this heater. Improper use of this
heater can cause serious injury or death from burns, fire, explosion, 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
heater may not be working properly. Get fresh air at once! Have heater serviced.
Some people are more affected by carbon monoxide than others. These include
pregnant women, people with heart or lung disease or anemia, those under the
influence of alcohol, and those at high altitudes.
Natural Gas: Natural gas is odorless. An odor-making agent is added to natural gas.
The odor helps you detect a natural gas leak. However, the odor added to natural gas
can fade. Natural 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.
Safety Information continued on page 3
2
103546
SAFETY
WARNINGS
Continued
INFORMATION
Continued
WARNING: Any change to this heater or its controls can be dangerous.
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. 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 fire department
3. Heater model CGN10L shall not be installed in a bathroom.
4. Never install the heater
• in a recreational vehicle
• where curtains, furniture, clothing, or other flammable objects are less than
36 inches from the front, top, or sides of the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
5. This heater needs fresh, outside air ventilation to run properly. This heater has
an oxygen depletion sensor (ODS) pilot light safety system. The ODS shuts
down the heater if not enough fresh air is available. See Fresh Air for Combus-
tion and Ventilation, pages 5 through 8.
6. Keep all air openings in front and bottom of heater clear and free of debris.
This will insure enough air for proper combustion.
7. If heater shuts off, do not relight until you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
8. Do not run heater
• where flammable liquids or vapors are used or stored
• under dusty conditions
9. Never place any objects on the heater.
10.Surface of heater 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 shut-down. Allow surface to cool before touching.
11.Carefully supervise young children when they are in same room with heater.
12.Make sure grill guard is in place before running heater.
13. Do not use heater if any part has been 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.
14.Turn off heater and let cool before servicing. Only a qualified service person
should service and repair heater.
15.Operating heater above elevations of 4,500 feet could cause pilot outage.
103546
3
PRODUCT
IDENTIFICATION
Ignitor Button
Control Knob
Grill
Guard
Glass
Panel
LOCAL CODES
UNPACKING
Front
Panel
Figure 1 - Vent-Free Natural Gas Heater
(Model CGN10L Shown)
Install and use heater with care. Follow all local codes. In the absence of local
codes, use the latest edition of The National Fuel Gas Code ANSI Z223.1, also
known as 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
1. Remove heater from carton.
2. Remove all protective packaging applied to heater for shipment.
3. Check heater for any shipping damage. If heater is damaged, promptly inform
dealer where you bought heater.
Heater
Cabinet
PRODUCT
FEATURES
Safety Device
This heater has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS).
The ODS/pilot is a required feature for vent-free room heaters. The ODS/pilot shuts
off the heater if there is not enough fresh air.
Piezo Ignition System
This heater has a piezo ignitor. This system requires no matches, batteries, or other
sources to light heater.
4
103546
FRESH AIR
W ARNING
FOR
COMBUSTION
AND
VENTILATION
This heater shall not be installed in a confined space unless
provisions are provided for adequate combustion and ventilation
air. Read the following instructions to insure proper fresh air for
this and other fuel-burning appliances in your home.
Today’s 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 efficient, your home needs to breathe.
Fresh air must enter your home. All fuel-burning appliances need fresh air for
proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air from
the house to operate. You must provide adequate fresh air for these appliances.
This will insure proper venting of vented fuel-burning appliances.
PROVIDING ADEQUATE VENTILATION
The following is exerpts from National Fuel Gas Code. NFPA 54/ANSI Z223.1,
Section 5.3, Air for Combustion and Ventilation.
All spaces in homes fall into one of the three following ventilation classifications:
1. Unusually Tight Contruction; 2. Unconfined Space; 3. Confined Space.
The information on pages 5 through 8 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 outside atmosphere have a continuous
water vapor retarder with a rating of one perm (6x10
less with openings gasketed or sealed
b. weather stripping has been added on openable windows and doors
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
If your home does not meet all of the three criteria above, proceed to page 6.
Ventilation Air From Outdoors
and
-11
per pa-sec-m2) or
, page 8
.
and
103546
Confined and Unconfined Space
The National Fuel Gas Code (ANSIZ2123.1, 1992 Section 5.3) 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 unconfining space as a space whose volume is not less than 50 cubic feet per
1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances
installed in that space. Rooms communicating directly with the space in which the
appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.
* Adjoining rooms are communicating only if there are doorless passageways or
ventilation grills between them.
Continued
5
FRESH AIR
FOR
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet to determine if you have a confined or unconfined space.
COMBUSTION
AND
VENTILATION
Continued
Space: Includes the room in which you will install heater plus any adjoining rooms with
doorless passageways or ventilation grills between the rooms.
1. Determine the volume of the space (length x width x height).
Length x Width x Height = ___________________ cu. ft. (volume of space)
Example:
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. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space
can support.
____________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr
the space can support)
Example:
Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Example:
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
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:
The space in the above example is a confined space because the actual Btu/Hr used is more
than the maximum Btu/Hr the space can support. You must provide additional fresh air.
Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides
an unconfined space, remove door to adjoining room or add ventilation grills between
rooms. See Ventilation Air From Inside Building, page 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 8.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space
is an unconfined space. You will need no additional fresh air ventilation.
Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) =
2560 cu. ft. (volume of space)
2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum
Vent-free heater ___________________ Btu/Hr
Gas water heater* ___________________ Btu/Hr
Gas furnace ___________________ Btu/Hr
Vented gas heater ___________________ Btu/Hr
Gas fireplace logs ___________________ Btu/Hr
Other gas appliances* + ___________________ Btu/Hr
Total = ___________________ Btu/Hr
Gas water heater 44,000 Btu/Hr
Vent-free heater + 10,000 Btu/Hr
Total = 54,000 Btu/Hr
51,200 Btu/Hr (maximum the space can support)
54,000 Btu/Hr (actual amount of Btu/Hr used)
6
103546
FRESH AIR
FOR
COMBUSTION
AND
VENTILATION
Continued
WARNING
If the area in which the heater may be operated is smaller than
that defined as an unconfined space, provide adequate combustion and ventilation air by one of the methods described in the
National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3
cable local codes.
or appli-
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space. When ventilating to
an adjoining unconfined space, you must provide two permanent 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 NFPA 54/ANSI Z223.1,
Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills
or ducts.
WARNING
Rework worksheet, adding the space of the adjoining unconfined
space.
appliances in both spaces.
The combined spaces must have enough fresh air to supply all
Ventilation
Grills
into Adjoining
Room,
Option 1
12"
Ventilation Grills
Into Adjoining Room,
Option 2
Or
Remove
Door into
Adjoining
Room,
Option 3
12"
103546
Figure 2 - Ventilation Air from Inside Building
Continued
7
FRESH AIR
FOR
COMBUSTION
AND
VENTILATION
Continued
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.
IMPORTANT:
a thermostat-controlled power vent. Heated air entering the attic will activate the
power vent.
Do not provide openings for inlet or outlet air into attic if attic has
Outlet
Air
Inlet
Air
Outlet
Air
Inlet Air
Figure 3 - Ventilation Air from Outdoors
Ventilated
Attic
Ventilated
Crawl Space
To Attic
To
Crawl
Space
8
103546
INSTALLING TO
NOTICE
WALL
A qualified service person must install heater. Follow all local codes.
CHECK GAS TYPE
Use only natural gas. If your gas supply is not natural, do not install heater. Call
dealer where you bought heater for proper type heater.
INSTALLATION ITEMS
Before installing heater, make sure you have the items listed below:
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See Accessory, page 25.
• test gauge connection * (see
Figure 12, page 14)
• sediment trap
• tee joint
• pipe wrench
LOCATING HEATER
This heater is designed to be mounted on a wall.
W ARNING
Maintain the minimum clearances shown in Figure 4 (page 10). If you
can, provide greater clearances from floor, ceiling, and joining wall.
WARNING
Never install the heater
• in a bathroom (Model CGN10L - Input 10,000 Btu’s)
• in a recreational vehicle
• where curtains, furniture, clothing, or other flammable objects
are less than 36 inches from the front, top, or sides of the heater
• as a fireplace insert
• 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 in the air
(such as tobacco smoke) exist, may discolor walls.
IMPORTANT:
stalling heater in rooms without enough ventilation air may cause mildew to form from
too much moisture. See Fresh Air for Combustion and Ventilation, pages 5 through 8.
Vent-free heaters add moisture to the air. Although this is beneficial, in-
CAUTION
If you install the heater in a home garage
• heater pilot and burner must be at least 18 inches above floor
• locate heater where moving vehicle will not hit it
103546
Continued
9
INSTALLING TO
WALL
Continued
For convenience and efficiency, install heater
• where there is easy access for operation, inspection, and service
• in coldest part of room
CEILING
36"
6"
Minimum
From
Sides Of
Heater
Left
Side
FLOOR
Minimum
Right
Side
3"
Minimum To Top Surface
Of Carpeting, Tile Or Other
Combustible Material
Figure 4 - Mounting Clearances As Viewed From Front of Heater
INSTALLING HEATER TO WALL
Marking Screw Locations
1. Determine where you will locate heater.
W ARNING
Maintain minimum clearances shown in Figure 5. If you can,
provide greater clearances from floor and joining wall.
2. Mark two mounting screw locations on wall (see Figure 5).
8 7/8"
Minimum To
Maintain 6"
Clearance
From Wall
JOINING WALL
7 3/4"
Mounting
Screw
Locations
20 1/4"
Minimum To
Maintain 3"
Clearance
From Floor
10
FLOOR
Figure 5 - Mounting Screw Locations
103546
INSTALLING TO
ANCHOR
WALL
Continued
Installing Two Mounting Screws
Note:
Wall anchors and mounting screws are in hardware package. The hardware
package is provided with heater.
Attaching to wall stud method
For attaching mounting screw to wall stud
1. Drill hole at marked location using 9/64" drill bit.
2. Insert mounting screw into wall stud.
3. Tighten screw until 1/16" space (thickness of penny) is between screwhead and
wall.
Attaching to wall anchor method
Follow instructions below to attach mounting screws to hollow walls (wall areas
between studs) or solid walls (concrete or masonry).
1. Drill holes at marked locations using 5/16" drill bit. For solid walls (concrete or
masonry), drill at least 1 1/4" deep.
2. Fold wall anchor (see Figure 6).
3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall.
Figure 6 - Folding Anchor
4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to
“pop” open anchor wings (see Figure 7).
IMPORTANT:
Do not hammer key!
For thick walls (over 1/2" thick) or solid walls, do not pop open wings.
5. Tighten two screws until 1/16" space (thickness of penny) is between
screwheads and wall (see Figure 8).
Thin Walls
(1/4" to 1/2" thick)
Figure 7 - Popping Open Anchor Wings For Thin Walls
Thin or Thick Wall
(thick wall shown)
1/16" Space
103546
Figure 8 - Tightening Anchors
Solid Wall
Continued
11
INSTALLING TO
WALL
Continued
Placing Heater On Mounting Screws
1. Locate two keyhole slots on back panel of heater (see Figure 9).
2. Place large openings of slots over screwheads. Slide heater down until screws
are in small portion of slots.
Keyhole
Slots
Figure 9 - Location Of Keyhole Slots On Back Panel Of Heater
Removing Front Panel Of Heater
1. Remove two screws near bottom corners of front panel.
2. Lift straight up on grill guard until it stops. Grill guard will slide up about 1/4".
3. Pull bottom of front panel forward, then down.
Figure 10 - Removing Front Panel Of Heater
Installing Bottom Mounting Screw
1. Locate bottom mounting hole. This hole is near bottom on back panel of heater
(see Figure 11).
2. Mark screw location on wall.
3. Remove heater from wall.
4. If installing bottom mounting screw into hollow or solid wall, install wall anchor.
Follow steps 1 through 5 under Attaching To Wall Anchor Method, page 11.
If installing bottom mounting screw into wall stud, drill hole at marked location
using 9/64" drill bit.
5. Replace heater on wall.
6. Insert bottom anchor screw through back panel into bottom anchor or drilled
hole (see Figure 11).
7. Tighten screw until heater is firmly secured to wall. Do not over tighten.
Note:
Do not replace front panel at this time. Replace front panel after making
gas connections and checking for leaks (see pages 13-15).
12
Figure 11 - Installing Bottom Mounting Screw
103546
CONNECTING
TO GAS
SUPPLY
NOTICE
A qualified service person must connect heater to gas supply.
Follow all local codes.
W ARNING
Never connect heater to private (non-utility) gas wells. This gas is
commonly known as well-head gas
IMPORTANT:
pressure must be no greater than 14 inches of water. If gas line pressure is higher,
heater regulator damage could occur.
Check gas line pressure before connecting heater to gas line. Gas line
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 3/8" diameter or greater to allow proper gas volume to heater.
If pipe is too small, undue loss of pressure will occur.
Installation must include a manual shutoff valve, ground joint 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 12, page 14).
Apply pipe joint sealant lightly to male threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe could result in clogged heater valves.
CAUTION
Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
103546
Install sediment trap in supply line as shown in Figure 12, page 14. Locate sediment
trap where it is within reach for cleaning. 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.
Continued
13
CONNECTING
TO GAS
SUPPLY
Continued
IMPORTANT:
and/or fittings.
Ground Joint Union
Manual Shutoff Valve *
From Gas Meter
10.5" W.C. Pressure)
Hold pressure regulator with wrench when connecting it to gas piping
3/8" NPT
Pipe Nipple
(4" W.C. to
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Pressure
Regulator
Heater
Cabinet
Test
Gauge
Connection *
CHECKING
GAS
CONNECTIONS
3" Minimum
Figure 12 - Gas Connection
* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See Accessory, page 25.
Tee
Joint
Pipe
Nipple
Cap
Sediment Trap
W ARNING
Test all gas piping and connections for leaks after installing or
servicing. Correct all leaks at once.
W ARNING
Never use an open flame to check for a leak. Apply a mixture of
liquid soap and water to all joints. Bubbles forming show a leak.
Correct all leaks at once.
14
PRESSURE TESTING GAS SUPPLY PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
1. Disconnect heater and its individual manual shutoff valve from gas supply
piping system. Pressures in excess of 1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where manual shutoff valve was connected.
3. Pressurize supply piping system by either using compressed air or
opening main gas valve located on or near gas meter.
103546
CHECKING
GAS
4. Check all joints of gas supply piping system. Apply mixture of liquid soap and
water to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
CONNECTIONS
Continued
Test Pressures Equal To or Less Than 1/2 PSIG
1. Close manual shutoff valve (see Figure 13).
2. Pressurize supply piping system by either using compressed air or opening main
gas valve located on or near gas meter.
3. Check all joints from gas meter to manual shutoff valve (see Figure 14). Apply
mixture of liquid soap and water to gas joints. Bubbles forming show a leak.
4. Correct all leaks at once.
PRESSURE TESTING HEATER GAS CONNECTIONS
1. Open manual shutoff valve (see Figure 13).
2. Open main gas valve located on or near gas meter.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from manual shutoff valve to control valve (see Figure 14).
Apply mixture of liquid soap and water to gas joints. Bubbles forming show a
leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 16 through 18). Check the rest of the
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 18).
8. Replace front panel.
ON
Open
POSITION
Manual
Shutoff
Valve
Figure 13 - Manual Shutoff Valve
Gas Meter
Figure 14 - Checking Gas Joints
OFF
POSITION
Closed
Control Valve Location
Manual
Shutoff
Valve
103546
15
OPERATING
Clockwise
FOR YOUR SAFETY READ BEFORE LIGHTING
HEATER
W ARNING
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal
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 neighbor’s phone. Follow
the gas supplier’s 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, don’t try to repair it,
call a qualified service technician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately
call a qualified service technician to inspect the appliance and to replace
any part of the control system and any gas control which has been under
water.
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above.
2. Make sure manual shutoff valve is fully open.
3. Turn control knob clockwise
Ignitor Button
IGNITOR
HIGH
to the OFF position.
Control Knob
PILOT
LOW
OFF
Figure 15 - Control Knob In The OFF Position
16
103546
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
at the top of page 12. If you don’t smell gas, go to the next step.
5. Press in control knob and turn counterclockwise
C-clockwise
to the PILOT
position. Keep control knob pressed in for five (5) seconds (see Figure 15,
page 16).
Note:
You may be running this heater for the first time after hooking up
to gas supply. If so, the control knob may need to be pressed in for 30
seconds. This will allow air to bleed from the gas system.
• If control knob does not pop up when released, contact a qualified
service person or gas supplier for repairs.
6. With control knob pressed in, push down and release ignitor button. This
will light pilot. The pilot is attached to the front of burner. The pilot can be
seen through the glass panel. If needed, keep pressing ignitor button until
pilot lights.
Note:
If pilot does not stay lit, refer to Troubleshooting, pages 20 through
23. Also 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 18.
Ignitor Electrode
Thermocouple
Figure 16 - Pilot
Pilot Burner
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.
8. Turn control knob counterclockwise
C-clockwise
to the HIGH position. The
main burner should light. Set control knob to any heat level between HIGH
and LOW. To turn control knob from HIGH to a lower setting, press in the
control knob and turn counterclockwise
Note:
Both HIGH and LOW are locked positions. You must press in control
C-clockwise
.
knob before turning it from these positions.
103546
CAUTION
Do not try to adjust heating levels by using the manual shutoff valve.
Continued
17
Clockwise
Clockwise
OPERATING
HEATER
Continued
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
2. Press in control knob and turn clockwise
to the PILOT position.
Clockwise
to the OFF position.
Shutting Off Burner Only (pilot stays lit)
1. Turn control knob clockwise
to the PILOT position.
MANUAL LIGHTING PROCEDURE
1. Remove front panel (see Figure 10, page 12).
2. Follow steps 1 through 5 under Lighting Instructions, pages 16 and 17.
3. With control knob pressed in, strike match. Hold match to pilot until pilot
lights.
4. Keep control knob pressed in for 30 seconds after pilot is lit. After 30
seconds, release control knob.
5. Replace front panel.
INSPECTING
BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 17 shows a correct pilot flame pattern. Figure 18 shows an incorrect pilot
flame pattern. The incorrect pilot flame is not touching the thermocouple. This will
cause the thermocouple to cool. When the thermocouple cools, the heater will shut
down.
Pilot Burner
Thermocouple
GRH/OV 009GOOD PILOT
Figure 17 - Correct Pilot Flame Pattern
Thermocouple
Pilot Burner
GRH/OV 010BAD PILOT
Figure 18 - Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 18
• turn heater off (see To Turn Off Gas to Appliance, above)
• see Troubleshooting, pages 20 through 23
Continued
18
103546
INSPECTING
BURNER
Continued
BURNER FLAME PATTERN
Figure 19 shows a correct burner flame pattern. Figure 20 shows an incorrect
burner flame pattern. The incorrect burner flame pattern shows yellow tipping of
the flame. It also shows the flame higher than 1/2 the glass panel height.
W ARNING
If yellow tipping occurs, your heater could produce increased
levels of carbon monoxide. If burner flame pattern shows yellow
tipping, follow instructions at bottom of this page.
NOTICE
Do not mistake orange flames with yellow tipping. Dust or other
fine particles enter the heater and burn causing brief patches of
orange flame.
CORRECT FLAME PATTERN
AT HIGH POSITION
(Model CGN6 will be lower due to lower input rating)
Figure 19 - Correct Burner Flame Pattern
INCORRECT FLAME PATTERN
AT HIGH POSITION
Figure 20 - Incorrect Burner Flame Pattern
If burner flame pattern is incorrect, as shown in Figure 20
• turn heater off (see To Turn Off Gas to Appliance, page 18)
• see Troubleshooting, pages 20 through 23
1/2 GLASS HEIGHT
(Model CGN10A)
Yellow
Tipping
1/2 GLASS HEIGHT
103546
19
CLEANING
AND
MAINTENANCE
W ARNING
Turn off heater and let cool before cleaning.
CAUTION
You must keep control areas, burner, and circulating air
passageways of heater clean. Inspect these areas of heater before
each use. Have heater inspected yearly by a qualified service
person. Heater may need more frequent cleaning due to excessive
lint from carpeting, bedding material, etc.
ODS/PILOT AND BURNER ORIFICE
• Use a vacuum cleaner, pressurized air, or small, soft bristled brush to clean.
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air to clean.
Exterior
• Use a soft cloth dampened with a mild soap and water mixture. Wipe the
cabinet to remove dust.
TROUBLE-
SHOOTING
Note:
All troubleshooting
items are listed in order of
operation.
W ARNING
Turn off heater and let cool before servicing. Only a qualified
service person should service and repair heater.
CAUTION
Never use a wire, needle, or similar object to clean ODS/pilot. This
can damage ODS/pilot unit.
OBSERVED
PROBLEM
When ignitor button is
pressed, there is no
spark at ODS/pilot
POSSIBLE
CAUSE
1. Ignitor electrode positioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to ignitor cable
4. Ignitor cable pinched or
wet
5. Piezo ignitor nut is loose
6. Broken ignitor cable
7. Bad piezo ignitor
REMEDY
1. Replace ignitor
2. Replace ignitor
3. Reconnect ignitor cable
4. Free ignitor cable if
pinched by any metal or
tubing. Keep ignitor
cable dry
5. Tighten nut holding piezo ignitor to heater
cabinet. Nut is located inside heater cabinet at top
6. Replace ignitor cable
7. Replace piezo ignitor
20
103546
TROUBLE-
SHOOTING
Continued
OBSERVED
PROBLEM
When ignitor button
is pressed, there is
spark at ODS/pilot
but no ignition
POSSIBLE
CAUSE
1. Gas supply turned off
or manual shutoff
valve closed
2. Control knob not in
PILOT position
3. Control knob not
pressed in while in
PILOT position
4. Air in gas lines when
installed
5. ODS/pilot is clogged
6. Gas regulator setting is
not correct
REMEDY
1. Turn on gas supply or
open manual shutoff
valve
2. Turn control knob to
PILOT position
3. Press in control knob
while in PILOT
position
4. Continue holding down
control knob. Repeat
igniting operation until
air is removed
5. Clean ODS/pilot (see
Cleaning and Maintenance, page 20) or
replace ODS/pilot
assembly
6. Replace gas regulator
ODS/pilot lights but
flame goes out when
control knob is
released
1. Control knob not fully
pressed in
2. Control knob not
pressed in long enough
3. Manual shutoff valve
not fully open
4. Thermocouple connection loose at control
valve
5. Pilot flame not touching thermocouple,
which allows thermocouple to cool, causing
pilot flame to go out.
This problem could be
caused by one or both
of the following:
A) Low gas pressure
B) Dirty or partially
clogged ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
1. Press in control knob
fully
2. After ODS/pilot lights,
keep control knob
pressed in 30 seconds
3. Fully open manual
shut-off valve
4. Hand tighten until
snug, then tighten 1/4
turn more
5. A) Contact local
natural gas company
B) Clean ODS/pilot
(see Cleaning and
Maintenance, page 20)
or replace ODS/pilot
assembly
6. Replace thermocouple
7. Replace control valve
103546
Continued
21
TROUBLE-
SHOOTING
Continued
OBSERVED
PROBLEM
Burner does not light
after ODS/pilot is lit
POSSIBLE
CAUSE
1. Burner orifice is
clogged
2. Burner orifice diameter
is too small
3. Inlet gas pressure is
too low
REMEDY
1. Clean burner orifice (see
Cleaning and Maintenance, page 20) or
replace burner orifice
2. Replace burner orifice
3. Contact local natural gas
company
Delayed ignition of
burner
Burner backfiring
during combustion
Yellow flame during
burner combustion
1. Manifold pressure is
too low
2. Burner orifice is
clogged
1. Burner orifice is
clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Not enough air
2. Inlet gas pressure is
too low
3. Gas regulator defective
1. Contact local natural gas
company
2. Clean burner orifice (see
Cleaning and Maintenance, page 20) or
replace burner orifice
1. Clean burner orifice (see
Cleaning and Maintenance, page 20) or
replace burner orifice
2. Replace burner
3. Replace gas regulator
1. Check burner for dirt
and debris. If found,
clean burner (see
Cleaning and Maintenance, page 20)
2. Contact local natural gas
company
3. Replace gas regulator
22
Slight smoke or odor
during initial operation
Heater produces a
whistling noise when
burner is lit
1. Residues from manufacturing processes
1. Turning control knob
to HIGH position
when burner is cold
2. Air in gas line
3. Air passageways on
heater blocked
4. Dirty or partially
clogged burner orifice
1. Problem will stop after a
few hours of operation
1. Turn control knob to
LOW position and let
warm up for a minute
2. Operate burner until air
is removed from line.
Have gas checked by
local natural gas company
3. Observe minimum
installation clearances
(see Figure 4, page 10)
4. Clean burner (see
Cleaning and Maintenance, page 20) or
replace burner orifice.
103546
TROUBLE-
SHOOTING
Continued
W ARNING
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
fire department.
IMPORTANT:
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.
OBSERVED
PROBLEM
Heater produces a
clicking/ticking noise
just after burner is lit
or shut off
Heater produces
unwanted odors
Heater shuts off in
use (ODS operates)
Operating heater where impurities in air exist may create odors.
POSSIBLE
CAUSE
1. Metal expanding while
heating or contracting
while cooling
1. Heater burning vapors
from paint, hair spray,
glues, etc. See
TANT
statement above
2. Gas leak. See Warn-
ing statement at
top of page
1. Not enough fresh air is
available
2. Low line pressure
3. ODS/pilot is partially
clogged
IMPOR-
REMEDY
1. This is common with
most heaters. If noise is
excessive, contact
qualified service person
1. Ventilate room. Stop
using odor-causing
products while heater is
running
2. Locate and correct all
leaks (see Checking Gas
Connections, page 14)
1. Open window and/or
door for ventilation
2. Contact local natural
gas company
3. Clean ODS/pilot (see
Cleaning and Maintenance, page 20)
103546
Gas odor even when
control knob is in
OFF position
Gas odor during
combustion
Moisture/condensation
noticed on windows
1. Gas leak. See Warn-
ing statement at
top of page
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. See Warn-
ing statement at
top of page
1. Not enough combustion/ventilation air.
1. Locate and correct all
leaks ( see Checking Gas
Connections, page 14)
2. Replace control valve
1. Take apart gas tubing
and remove foreign
matter
2. Locate and correct all
leaks (see Checking Gas
Connections, page 14)
1. Refer to Fresh Air for
Combustion and Ventilation requirements
(page 5)
23
TECHNICAL
SERVICE
SPECIFICATIONS
You may have further questions about installation, operation, or troubleshooting.
If so, contact DESA International’s Technical Service Department at 1-800-323-
5190.
CGN6L CGN10L
Btu (Variable) 4,400/6,000 5,000/10,000
Type Gas Natural Only Natural Only
Ignition Piezo Piezo
Pressure Regulator Setting 3" W.C. 3" W.C.
Inlet Gas Pressure (inches of water)
Maximum 10.5" 10.5"
Minimum 4" 4"
Dimensions, Inches (H x W x D)
Heater 20 1/2 x 13 1/2 x 5 20 1/2 x 13 1/2 x 5
Carton 25 x 16 11/16 x 7 1/2 25 x 16 11/16 x 7 1/2
Weight (pounds)
Heater 13.5 13.5
Shipping 17 18
SERVICE
HINTS
REPLACEMENT
PARTS
When gas pressure is too low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
When gas quality is bad
• pilot will not stay lit
• burner will produce flames and soot
• heater will backfire when lit
You may feel your gas pressure is too low or gas quality is bad. If so, contact your
local natural gas supplier.
Note:
Use only original replacement parts. This will protect your warranty coverage
for parts replaced under warranty.
Parts Under Warranty
Contact authorized dealer from whom you purchased this product. If they cannot
supply original replacement part(s), either contact your nearest Parts Central (see
page 25) or call DESA International’s Technical Service Department at 1-800-3235190 for referral information.
When contacting your dealer or DESA International, have ready:
• your name
• your address
• model number 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 defective part to the factory.
24
Parts Not Under Warranty
Contact authorized dealers of this product. If they cannot supply original replacement part(s), either contact your nearest Parts Central (see page 25) or call DESA
International’s Parts Department at 1-800-972-7879 for referral information.
When calling DESA International, have ready:
• model number of your heater
• the replacement part number
103546
PARTS
CENTRALS
These Parts Centrals are privately owned businesses. They have agreed to support
our customer’s needs by providing original replacement parts and accessories.
Baltimore Electric
1348 Dixwell Avenue
Hamden, CT 06514
1-800-397-7553
203-248-7553
Parts Department
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383
All States
219-462-7441
1-800-362-6951
FBD
1349 Adams Street
Bowling Green, KY 42103
502-846-1199
1-800-654-8534
Four Flags Power
Products
1115 Stateline Road
Niles, MI 49120
616-684-2697
1-800-268-4983
Parts Only
1184 Wilson NW
Walker, MI 49504
616-791-4760
1-800-446-1446
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108
KS, MO, AR
816-842-3911
East Coast Energy
Products
707 Broadway
W. Long Branch, NJ
07764
908-870-8809
1-800-755-8809
Tarantin Tank Co.
P.O. Box 6129
Freehold, NJ 07728
908-780-9340
1-800-922-0724
Dayton Hardware
P.O. Box 275
North Dayton Station
Dayton, OH 45404
All States
513-258-3721
OH 1-800-762-3426
Halco Enterprises
208 Carter Drive, Unit 21
West Chester, PA 19382
215-696-2670
1-800-368-0803
LA Porte’s Parts & Service
2444 North 5th Street
Hartsville, SC 29550
803-332-0191
Parts Department
Cans Unlimited, Inc.
P.O. Box 645
Taylor, SC 29687
All States
803-879-3009
1-800-845-5301
SERVICE
PUBLICATIONS
ACCESSOR Y
Master Service Center
You can purchase a service manual from the address listed on the back page of this
manual. Send a check for $5.00 payable to DESA International.
Purchase this heater accessory from your local dealer. If they cannot supply this
accessory, either contact your nearest Parts Central (see above) or call DESA
International’s Parts Department at 1-800-972-7879 for referral information. You
can also write to the address listed on the back page of this manual.
MANUAL SHUTOFF
VALVE - GA5010
Manual shutoff valve with 1/8"
NPT tap.
103546
25
26
CGN10L
CGN6L
23
22
21
20
13
12
10
4
11
7
6
9
14
15
16
28
18
24
10
27
19
25
26
29
103546
3
2
5
8
17
HEATER EXPLODED VIEW
1
P ARTS LIST
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
NO. DESCRIPTION QTY.
1 098304-01 098304-01 Screw, #10 x 3/8" 2
2 099467-05 099467-05 Front Panel (Ivory) 1
3 099318-04 099318-04 Grill Guard 1
4 101108-01 101108-01 Grill Guard Clip 2
5 102018-01AA 102018-01AA Bottom Glass Retainer 1
6 098260-03 098260-03 Glass Panel 1
7 098532-03AA 098532-03AA Top Glass Retainer 1
8 M11084-38 M11084-38 Screw, #8 x 3/8" 8
9 098352-03BR 098352-03BR Deflector Unit 1
10 098271-03 098271-03 Ignitor Cable 1
11 098249-01 098249-01 Nut, M5 2
12 099346-01 100701-03 ODS/Pilot Assembly 1
12-1 098514-01 098514-01 Thermocouple 1
12-2 098594-01 098594-01 Ignitor Electrode 1
13 099386-02 099386-02 Burner 1
14 099387-05 099387-05 Pilot Tubing 1
15 098251-01 098251-03 Injector 1
16 099463-01 099463-01 Injector Holder 1
17 099415-01 099415-01 Pressure Regulator 1
18 099462-01 099462-01 Burner Tubing 1
19 099391-02 099391-02 Regulator Tubing 1
20 098276-01 098276-01 1/8" NPT Plug 1
21 099057-01 099057-01 Pressure Tap Fitting 1
22 099413-01 099413-01 Control Valve 1
23 099468-14 – Cabinet Assembly 1
24 102445-01 102445-01 Piezo Ignitor 1
25 099393-01 099393-01 Control Knob 1
26 098508-01 098508-01 Valve Retainer Nut 1
27 098303-02 098303-02 Screw, #6 x 5/16" 2
28 099553-01 099553-01 Pilot Shield 1
29 099818-01 099818-01 Internal Tooth Washer 1
PART NUMBER FOR
CGN6L
– 099468-15 Cabinet Assembly 1
CGN10L
(CGN6L Only)
(CGN10L Only)
103546
PARTS AVAILABLE - NOT SHOWN
099395-10 099395-03 Control Position Label 1
100642-02 100642-02 Assembly, Hardware 1
12-1
12-2
ODS/PILOT
27
WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
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
COMFORT GLOW VENT-FREE RESIDENTIAL GAS HEATERS
DESA International 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 only the cost of part(s) required
to restore this heater to proper operating condition. Warranty part(s) MUST be obtained through authorized dealers
of this product and/or DESA International 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
WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO (2)
YEARS FROM THE DATE OF FIRST PURCHASE; AND DESA INTERNATIONAL’S LIABILITY IS
HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNATIONAL
SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT,
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:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
103546-01
REV. A
3/97
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