Desa CGN20, RN30D, CGN20L User Manual
BLUE-FLAME VENT-FREE
NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
CGN20
RN30D
®
Models: CGN20, CGN20L, and RN30D
CGN20L
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 air
at 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 Combustion
and 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 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
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:
1. Unusually Tight Construction; 2. Unconfined Space; 3. Confined Space.
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 heater 40,000 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
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