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.
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. (I.E. Installation of this
product is permitted after the manufactured (mobile) home is sited)
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.
WARNING: Improper installation,
adjustment, alteration, service, or
maintenance can cause injury or
property damage. Refer to this
manual for correct installation
and operational procedures. For
assistance or additional information consult a qualified installer,
service agency, or the gas supplier.
WARNING: This is an unvented
gas-fired heater. It uses air (oxygen) from the room in which it is
installed. Provisions for adequate
combustion and ventilation air
must be provided. Refer to
Combustion and Ventilation
tion on page 3 of this manual.
Air for
sec-
Save this manual for future reference.
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
SAFETY
INFORMATION
WARNINGS
WARNING ICON G 001
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, 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 heater
may not be working properly. Get fresh airat once! Have heater serviced. Some people
are more affected by carbon monoxide than
others. These include pregnant women, persons 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.
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.This heater shall not be installed in a
bedroom or 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 Air for Combustionand Ventilation, pages 3 through 5.
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 shutdown.
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 ser vicing. Only a qualified service person
should service and repair heater.
15. Operating heater above elevations of
4,500 feet could cause pilot outage.
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes,
use the latest edition of National Fuel GasCode 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
UNPACKING
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.
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 ventfree 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.
2
103568
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Front
Panel
Figure 1 - Vent-Free Natural Gas Heater
Ignitor Button
AIR FOR COMBUSTION
AND VENTILATION
WARNING: 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 excerpts 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:
The information on pages 3 through 5 will
help you classify your space and provide
adequate ventilation.
Control Knob
Grill
Guard
Heat Shield
(RN30D) or Glass
Panel (CGN20[L])
Heater
Cabinet
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
per pa-sec-m2) or 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
From Outdoors
If your home does not meet all of
the three criteria above, proceed to
page 4.
and
, page 5
Ventilation Air
.
and
-11
kg
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
103568
3
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
AIR FOR
COMBUSTION
AND VENTILATION
Continued
DETERMINING 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.
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:
16 ft. (width) x 8 ft. (ceiling height) =
2560 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.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:
space) ÷ 50 cu. ft. = 51.2 or 51,200
(maximum Btu/Hr the space can support)
3.Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater ________ Btu/Hr
Gas water heater* ______ Btu/Hr
Gas furnace ___________ Btu/Hr
Vented gas heater ______ Btu/Hr
Gas fireplace logs ______ Btu/Hr
Other gas appliances*+ __ Btu/Hr
Total = __Btu/Hr
Space size 20 ft. (length) x
2560 cu. ft. (volume of
Example:
Gas water heater40,000 Btu/Hr
Vent-free heater + 20,000 Btu/Hr
Total = 60,000 Btu/Hr
* 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:
51,200 Btu/Hr (maximum the space can
support)
60,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a confined space because the actual Btu/Hr used
is more than the maximum Btu/Hr the space
can support. You must provide additional
fresh air. Your options are as follows:
A. Rework worksheet, adding the space of
an adjoining room. If the extra space
provides an unconfined space, remove
door to adjoining room or add ventilation grills between rooms. See V entila-tion Air From Inside Building.
B. Vent room directly to the outdoors. See
V entilation Air From Outdoors, page 5.
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.
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
Gas Code, ANSI Z223.1, 1992,
Section 5.3
codes.
National Fuel
or applicable local
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, page 5). You
can also remove door into adjoining room
(see option 3, Figure 2, page 5). 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.
The combined spaces must have
enough fresh air to supply all
appliances in both spaces.
4
103568
AIR FOR COMBUSTION
AND VENTILATION
Continued
Ventilation Grills
Ventilation
Grills
into Adjoining
Room,
Option 1
Or
Remove
Door into
Adjoining
Room,
Option 3
Into Adjoining Room,
OWNER’S MANUAL
12"
Option 2
12"
Figure 2 - Ventilation Air from Inside Building
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 NFPA 54/ANSI
Z223.1, Section 5.3, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
IMPORTANT:
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.
Do not provide openings
Figure 3 - Ventilation Air from Outdoors
Outlet
Air
Inlet
Air
Outlet
Air
Inlet Air
Ventilated
Attic
To Attic
To
Crawl
Space
Ventilated
Crawl Space
103568
5
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
INSTALLING TO
WALL
NOTICE: 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
• test gauge connection * (see Figure 12,
page 8)
• sediment trap
• tee joint
• pipe wrench
* 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
Accessories, page 14.
WARNING:
Never install the heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 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.
CEILING
6" Minimum from
Sides of Heater
IMPORTANT:
ture 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 Com-bustion and Ventilation, pages 3 through 5.
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
For convenience and efficiency, install heater
• where there is easy access for operation,
inspection, and service
• where strong wind gusts from an open
door or garage door can not blow directly
into heater.
An optional fan kit is available from your
dealer. See Accessories, page 15. If planning to use fan, locate heater near an electrical outlet.
Vent-free heaters add mois-
36" Minimum
LOCATING HEATER
This heater is designed to be mounted on a
wall.
WARNING: Maintain the mini-
mum clearances shown in Figure
4. If you can, provide greater clearances from floor, ceiling, and joining wall.
You can locate model CGN20 and CGN20L
on the floor, away from a wall. An optional
floor mounting stand is needed. Purchase
the floor mounting stand from your dealer.
See Accessories, page 15.
Left
Side
Right
Side
*Minimum To Floor
FLOOR
Figure 4 - Mounting Clearances As Viewed From Front of Heater
6
16 3/4" - RN30D
3" - CGN20(L)
103568
OWNER’S MANUAL
INSTALLING TO
WALL
Continued
INSTALLING HEATER TO
WALL
Mounting Bracket
The mounting bracket is located on back
panel of heater. It has been taped there for
shipping. Remove mounting bracket from
back panel.
Mounting
Bracket
Figure 5 - Mounting Bracket Location
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.
4.Remove cardboard packing from grill
and glass (CGN20[L]) or heat shield
(RN30D).
Attaching to wall stud: This method
provides the strongest hold. Insert mounting
screws through mounting bracket and into
wall studs.
Attaching to wall anchor : This method
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
Decide which method better suits your needs.
Either method will provide a secure hold for
the mounting bracket.
Marking Screw Locations
1. Tape mounting bracket to wall
where heater will be located. Make
sure mounting bracket is level.
2. Mark screw locations on wall (see
Figure 7).
WARNING: Maintain minimum
clearances shown in Figure 7. If
you can, provide greater clearances from floor and joining wall.
Note:
Only mark last hole on each end of
mounting bracket. Insert mounting screws
through these holes only.
3. Remove tape and mounting bracket
from wall.
11"
Min.
Screws Through Last
Adjoining Wall
7 1/4"
Min.
16"
Only Insert Mounting
Hole On Each End
Floor
RN30D
16"
32 1/2"
Min.
Attaching Mounting Bracket To
Wall
Note:
Wall anchors, mounting screws, and
spacers are in hardware package. The hardware package is provided with heater.
Attaching to wall stud method
For attaching mounting bracket to wall studs
1.Drill holes at marked locations using
9/64" drill bit.
2.Place mounting bracket onto wall. Line
up last hole on each end of bracket with
holes drilled in wall.
3.Insert mounting screws through bracket
and into wall studs.
4.Tighten screws until mounting bracket
is firmly fastened to wall studs.
Attaching to wall anchor method
For attaching mounting bracket 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" deep.
2.Fold wall anchor as shown in Figure 8.
Figure 8 - Folding Anchor
3.Insert wall anchor (wings first) into hole.
Tap anchor flush to wall.
4.For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings.
IMPORTANT:
For thick walls (over 1/2" thick) or solid
walls, do not pop open wings.
Do not hammer key!
Figure 6 - Removing Front Panel Of Heater
Methods For Attaching
Mounting Bracket To Wall
Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
holes are 16 inches apart from their centers.
Attach mounting bracket to wall in one of
two ways.
1.Attaching to wall stud
2.Attaching to wall anchor
103568
Only Insert Mounting
Screws Through Last
Hole On Each End
Adjoining Wall
Floor
CGN20(L)
Figure 7 - Mounting Bracket Clearances
7
18 3/4"
Min.
Figure 9 - Popping Open Anchor Wings
For Thin Walls
5.Place mounting bracket onto wall. Line
up last hole on each end of bracket with
wall anchors.
6.Insert mounting screws through bracket
and into wall anchors.
7.Tighten screws until mounting bracket
is firmly fastened to wall.
Continued
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
INSTALLING TO
WALL
Continued
Placing Heater On Mounting
Bracket
1. Locate two horizontal slots on back
panel of heater.
2. Place heater onto mounting bracket.
Slide horizontal slots onto stand-out
tabs on mounting bracket.
Horizontal
Slots
Mounting
Bracket
Stand-Out
Tab
Figure 10 - Mounting Heater Onto
Mounting Bracket
Installing Bottom Mounting
Screws
1. Locate two bottom mounting holes.
These holes are near bottom on back
(attached
to wall)
7. Hold spacer in place with one hand.
With other hand, insert mounting screw
through bottom mounting hole and
spacer. Place tip of screw in opening
of wall anchor or drilled hole.
8. Tighten both screws 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 8-9).
CONNECTING TO
GAS SUPPLY
NOTICE: A qualified service person must connect heater to gas
supply. Follow all local codes.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
Pressure
Regulator
IMPORTANT:
fore connecting heater to gas line. Gas line
pressure must be no greater than 14 inches
of water. If gas line pressure is higher,
heater regulator damage could occur.
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
pressure will occur.
Check gas line pressure be-
Typical Inlet Pipe Diameters
20,000 Btu/Hr models 3/8" or greater
30,000 Btu/Hr models 1/2" or greater
Installation must include a manual 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 12).
Note:
Burner bracket
not shown for clarity
Figure 11 - Installing Bottom Mounting
Screws
panel of heater (see Figure 11).
2.Mark screw locations on wall.
3.Remove heater from mounting bracket.
4.If installing bottom mounting screws
into hollow or solid wall, install wall
anchors. Follow steps 1 through 4 under Attaching To Wall Anchor Method,
page 7.
If installing bottom mounting screw
into wall stud, drill holes at marked locations using 9/64" drill bit.
5.Replace heater onto mounting bracket.
6.Place spacers between bottom mounting holes and wall anchor or drilled
hole.
3/8" NPT
Pipe Nipple
Heater
Ground Joint
Tee Joint
Test
Gauge
Connection *
Sediment
Trap
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 Accessories, page 15.
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Tee Joint
Pipe Nipple
Cap
8
Union
Manual Shutoff
Valve *
3" Minimum
Cabinet
Typical Inlet
Pipe From
Gas Meter
(4" W.C. to 10.5"
W.C.
Pressure)
103568
OWNER’S MANUAL
CONNECTING TO
GAS SUPPLY
Continued
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
from going into pipe. Excess sealant in the
pipe could result in clogged heater valves.
CAUTION: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown
in Figure 12, page 8. 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.
IMPORTANT:
with wrench when connecting it to gas piping and/or fittings.
Hold pressure regulator
CHECKING GAS
CONNECTIONS
WARNING: Test all gas piping and connections for leaks
after installing or servicing. Correct all leaks at once.
3.Pressurize supply piping system by either using compressed air or
opening main gas valve located on or
near gas meter.
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.
Test Pressures Equal To or
Less Than 1/2 PSIG
1.Close manual shutoff valve (see Figure 13).
ON
POSITION
Manual
Shutoff
Valve
Figure 13 - Manual Shutoff Valve
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.
Open
OFF
POSITION
Closed
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,
page 10). Check the rest of the internal
joints for leaks.
7.Turn off heater (see To Turn Off Gas toAppliance, page 10).
8.Replace front panel.
Control Valve Location
WARNING: 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.
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.
103568
Gas Meter
Manual
Shutoff
Valve
Figure 14 - Checking Gas Joints
9
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
OPERATING HEA TER
FOR YOUR
SAFETY READ
BEFORE LIGHTING
WARNING: 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. Ne ver 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.T urn control knob clockwise
to the OFF position.
Ignitor Button
IGNITOR
Figure 15 - Control Knob In The OFF
Position
4.Wait f ive (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 left. If you don’t smell
gas, go to the next step.
5.Press in control knob and turn counterclockwise to the PILOT
position. Keep control knob pressed
in for fiv e (5) seconds (see Figure 15).
Note:
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 burner
and pilot are located behind the heat
shield. If needed, keep pressing ignitor button until pilot lights.
Note:
to Troubleshooting, pages 12-14. 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 ManualLighting Procedure.
Thermocouple
Figure 16 - Pilot
HIGH
You may be running this
If pilot does not stay lit, refer
Control Knob
LOW
Ignitor Electrode
PILOT
Pilot Burner
OFF
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.T urn contr ol knob counterclockwise
to the LOW position. The
main burner should light. Set control
knob to any heat level between HIGH
and LOW. T o turn control knob from
LOW to a higher setting, pr ess in the
control knob and turn counterclockwise .
Note:
Both HIGH and LOW are
locked positions. You must press in
control knob before turning it from
these positions.
CAUTION: Do not try to adjust heating levels by using the
manual shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1.T urn control knob clockwise
to the PILOT position.
2.Press in control knob and turn clockwise to the OFF position.
3.Turn off all electric power to the appliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
1.T urn control knob clockwise
to the PILOT position.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 5,
page 7).
2.Follow steps 1 through 5 under Light-ing Instructions.
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 lighting pilot. After 30
seconds, release control knob.
5.Replace front panel.
10
103568
OWNER’S MANUAL
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
Figure 17 - Correct Pilot Flame Pattern
Pilot
Thermocouple
Burner
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
heat shield height.
WARNING: 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. Dirt
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
If burner flame pattern is incorrect, as shown
in Figure 20
• turn heater off (see To Turn Off Gas toAppliance, page 10)
• see Troubleshooting, pages 12-14
CLEANING AND
MAINTENANCE
WARNING: 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
and bedding material, sawdust,
cobwebs, etc.
ODS/PILOT AND BURNER
• 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.
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 toAppliance, page 10)
• see Troubleshooting, pages 12-14
103568
1/2 HEAT SHIELD
OR GLASS HEIGHT
CORRECT FLAME PATTERN
AT HIGH POSITION
Figure 19 - Correct Burner Flame Pattern
Yellow
Tipping
1/2 HEAT SHIELD
OR GLASS HEIGHT
INCORRECT FLAME PATTERN
AT HIGH POSITION
Figure 20 - Incorrect Burner Flame Pattern
11
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
TROUBLESHOOTING
Note:
All troubleshooting items are listed
in order of operation.
OBSERVED PROBLEM
When ignitor button is pressed, there is no
spark at ODS/pilot
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition
ODS/pilot lights but flame goes out when
control knob is released
Burner does not light after ODS/pilot is lit
Delayed ignition of burner
WARNING: Turn off and unplug heater and let cool before
servicing. Only a qualified service person should service and
repair heater.
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. Broken ignitor cable
6. Bad piezo ignitor
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
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. Burner orifice is clogged
2. Burner orifice diameter is too small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
3. Inlet gas pressure is too low
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot. This can damage ODS/
pilot unit.
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. Replace ignitor cable
6. Replace piezo ignitor
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 Main-tenance, page 11) or replace ODS/pilot
assembly
6. Replace gas regulator
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 andMaintenance, page 11) or replace ODS/
pilot assembly
6. Replace thermocouple
7. Replace control valve
1. Clean burner (see Cleaning and Mainte-nance, page 11) or replace burner orifice
2. Replace burner orifice
3. Contact local natural gas company
1. Co. natural gas company
2. Clean burner (see Cleaning and Mainte-nance, page 11) or replace burner orifice
3. Contact local natural gas company
12
103568
OWNER’S MANUAL
TROUBLESHOOTING
OBSERVED PROBLEM
Burner backfiring during
combustion
Yellow flame during burner combustion
Slight smoke or odor during initial operation
Heater produces a whistling noise when
burner is lit
Continued
POSSIBLE CAUSE
1. Burner orifice is clogged or damaged
2. Inlet gas pressure is too low
3. Burner damaged
4. Gas regulator defective
1. Not enough air
2. Inlet gas pressure is too low
3. Gas regulator defective
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
REMEDY
1. Clean burner (see Cleaning and Maintenance, page 11) or replace burner orifice
2. Contact local natural gas company
3. Replace burner
4. Replace gas regulator
1. Check burner for dirt and debris. If found,
clean burner (see Cleaning and Mainte-nance, page 11)
2. Contact local natural gas company
3. Replace gas regulator
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 line checked by local natural gas company
3. Observe minimum installation clearances
(see Figure 4, page 6)
4. Clean burner (see Cleaning and Mainte-nance, page 11) or replace burner orifice
103568
Continued
13
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
TROUBLESHOOTING
IMPORTANT:
purities 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.
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)
Gas odor even when control knob is in OFF
position
Gas odor during combustion
Moisture/condensation noticed on windows
Operating heater where im-
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. Follow the
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
POSSIBLE CAUSE
1. Metal expanding while heating or contracting while cooling
1. Heater burning vapors from paint, solvents, glues, etc. See IMPORTANT statement above
2. Gas leak. See Warning statement above
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. See Warning statement above
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. See Warning statement above
1. Not enough combustion/ventilation air.
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 Check-ing Gas Connections, page 9)
1. Open window and/or door for ventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and Main-tenance, page 11)
1. Locate and correct all leaks (see Check-ing Gas Connections, page 9)
2. Replace control valve
1. Take apart gas tubing and remove foreign
matter
2. Locate and correct all leaks (see Check-ing Gas Connections, page 9)
1. Refer to Air for Combustion and Ventila-tion requirements (page 3)
14
103568
OWNER’S MANUAL
TECHNICAL
SERVICE
You may have further questions about installation, operation, or troubleshooting.
If so, contact DESA International’s Technical Service Department at 1-800-323-5190.
SERVICE HINTS
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.
SPECIFICA TIONS
RN30DCGN20(L)
Btu (Variable)15,000/30,00010,000/20,000
Type GasNatural OnlyNatural Only
IgnitionPiezoPiezo
Pressure Regulator Setting3" W.C.3" W.C.
Inlet Gas Pressure (inches of water)
Maximum10.5"10.5"
Minimum4"4"
Dimensions, Inches (H x W x D)
Heater23.5 x 25.9 x 8.023.5 x 18.5 x 8.0
Carton26 x 27.75 x 9.6326 x 20.5 x 9.63
Weight (pounds)
Heater3022
Shipping3527
ACCESSORIES
Purchase these heater accessories from your
local dealer. If they can not supply these
accessories, either contact your nearest Parts
Central (see page 15) 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
For all models. Manual shutoff valve with 1/
8" NPT tap.
FAN KITS - GA3100A AND
GA3200TA
For all models. Provides better heat distribution. Makes heater more efficient. Complete installation and operating instructions
included.
Manually controlled - GA3100A. Includes
ON/OFF switch.
Thermostatically controlled - GA3200TA.
Includes three settings: ON/OFF/AUTO.
For locating heater on the floor, away from
a wall. Complete installation and operating
instructions included.
103568
15
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
ILLUSTRATED
PARTS
BREAKDOWN
RN30D
21
22
26
27
14
20
11
4
8
5
3
2
7
10
16
9
6
12
13
17
19
25
15
8
24
18
23
1
10-1
10-2
ODS/Pilot
16
103568
OWNER’S MANUAL
PARTS LIST
RN30D
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 15 of this manual.
098306-02Control Position Decal1
099261-02Operating Instructions Decal1
100642-01Assembly, Hardware1
103568
17
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
ILLUSTRATED
PARTS
BREAKDOWN
CGN20
CGN20L
3
23
24
28
29
16
22
13
11
12
18
8
4
10
7
6
5
9
14
21
27
19
15
17
10
26
20
25
2
12-1
1
12-2
ODS/Pilot
18
103568
OWNER’S MANUAL
PARTS LIST
CGN20
CGN20L
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 15 of this manual.
KEYPART
NO.NUMBERDESCRIPTIONQTY.
1098304-01Screw, #10 x 3/8"2
2098742-03Front Panel (CGN20)1
BLUE-FLAME CGN20, CGN20L AND RN30D
VENT-FREE NATURAL GAS HEATERS
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 can’t supply original replacement
part(s), either contact your nearest Parts
Central or call DESA International’s Technical Service Department at 1-800-323-5190
for information.
When calling, have ready
• your name
• your address
• model number of your heater
• how heater was malfunctioning
• type of gas used (propane or natural gas)
• purchase date
Usually, we will ask you to return the defec-
tive part to the factory.
PARTS NOT UNDER
WARRANTY
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), either contact your nearest Parts
Central or call DESA International’s Parts
Department at at 1-800-972-7879 for referral information.
When calling, have ready
• model number of your heater
• the replacement part number
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. When calling a
Parts Central, ask for the Parts Department.
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
Parts Department
FBD
1349 Adams Street
Bowling Green, KY 42103
502-846-1199
1-800-654-8534
Fax: 1-800-846-0090
Four Flags Power Products
1115 Stateline Road
Niles, MI 49120
616-684-2697
1-800-268-4983
Parts Only
Master Parts Distributor
1184 Wilson NW
Grand Rapids, MI 49504
US 1-800-446-1446
616-791-0505
Fax: 1-616-791-8270
Parts Department
East Coast Energy
Products
707 Broadway
W. Long Branch, NJ 07764
908-870-8809
1-800-755-8809
Parts Department
Tarantin Tank Co.
P.O. Box 6129
Freehold, NJ 07728
908-780-9340
1-800-922-0724
Parts Department
Dayton Hardware
P.O. Box 275
North Dayton Station
Dayton, OH 45404
All States
513-258-3721
OH 1-800-762-3426
Parts Department
Halco Enterprises
208 Carter Drive, Unit 21
West Chester, PA 19382
610-430-7717
US 1-800-368-0803
Parts Department
Laporte's Parts & Service
2444 North 5th Street
Hartsville, SC 29550
803-332-0191
Parts Department
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108
KS, MO, AR
816-842-3911
Parts Department
20
Cans Unlimited, Inc.
P.O. Box 645
Taylor, SC 29687
All States
803-879-3009
1-800-845-5301
Parts Department
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 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
103568 01
NOT A UPC
103568-01
REV. B
9/97
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