Desa Comfort Glow CGP20TLB Quick start guide

®
BLUE FLAME VENT-FREE
PROPANE/LP GAS HEATER
OWNER'S OPERATION AND INSTALLATION MANUAL
CGP20TB
CGP20TLB
CGP30TB
CGP30TLB
Heater Sizes: 20,000 Btu/Hr Thermostat and
30,000 Btu/Hr Thermostat Model Heaters
IARNING: 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.
mDo 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: Improper installa-
tion, adjustment, alteration,
service, or maintenance can
cause injury or property dam-
age. Refer to this manual for
correct installation and opera-
tional procedures. For assis-
tance or additional informa-
tion consult a qualified in-
staller, 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 com-
bustion must be provided.
Refer to page 4 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.

BLUE FLAMEPROPANE/LP HEATER
SAFETY
INFORMATION
&WARNINGS
IMPORTANT: Read this owner's
manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Ira-
proper use of this heater can
cause serious Injury ordeath from
bums, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
1.
2.
.
ADANGER: Carbon monoxide
poisoning may lead to death! 4.
Carbon Monoxide Poisoning: Early 5.
signs of carbon monoxide poisoning re-
semble the flu, with headaches, dizziness,
or nausea. If you have these signs, the heater
may not be working properly. Get fresh air
at onee! Have heater serviced. Somepeople
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 6.
those at high altitudes.
Propano/LP Gas: Propane/LPgasis odor-
less. An odor-making agent is added to pro-
pane/LP gas. The odor helps you detect a
propane/LP gas leak. However,theodoradded
to propane/LP gas can fade. Propane!LPgas
may be present even though no odorexists.
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.
_kWARNING: Anychangetothis
heater or its controls can he dan-
gerous.
'7.
This appliance is only for use with the 10.
type of gas indicated onthe rating plate. 11.
This appliance is notconvertible foruse
with other gases.
Do not place propaneiLP supply tank(s)
inside any structure. Locate propane/
LP supply tank(s) outdoors.
If you smell gas 12.
•shut off gas supply
•do not tryto light any appliance
•do not touch any alectrical switeh; do 13.
not use any phone in your building
• immediately call your gas supplier 14.
fromaneighbor'sphone.Follow the
gas supplier's instructions
• ifyou cannot reachyour gas supplier,
call the fire department
This heater shall not be installed in a
bedroom or bathroom.
Never install the heater
• in arecreational vehicle
•wherecurtains, furniture, clothing, or
otherflammable objects are less than
36 inches from the front, top, or sides
of the heater
• as a fnceplaceinsert
• in high traffic areas
•in windy or drafty area
This heater needs fresh, outside air ven-
tilation to run properly. This heater has
an oxygen depletion sensor (ODS) pi-
lot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 4 through 6.
Keep air openings in front and bottom
of heater clear and free of debris. This
will ensure enough air for proper com-
bustion.
8. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
9. Do not run heater
•where flammable liquids or vapors
are used or stored
•under dusty conditions
15.
Never place any objects on the heater.
Surfac_ of heater becomes very hot
when running heater. Keep children and
adults away from hot surface to avoid
bums or clothing ignition. Heater will
remain hot for a time after shutdown.
Allow surface to cool before touching.
Carefully supervise young children
when they are in the same room with
heater.
Make sure grill guard is in place be-
fore running heater.
Do not use heater if any part has been
under water. Immediately call aquali-
fied 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.
Turnoffand unplug heater and let cool
before servicing. Only a qualified ser-
vice person should service and repair
heater.
16. Operating heater above elevations of
4,500 feet could cause pilot outage.
17. To prevent performance problems, do
not use propane fuel tank of less than
100 lbs. capacity.

OWNER'S MANUAL
PRODUCT
IDENTIFICATION
From
Panel
Ignitor Button Control Knob
Guard
Glass
Panel
Cabinet
PRODUCT
FEATURES
Safety Device
This heater has a pilot with an Oxygea
Depletion Sensor Shutoff System (ODS).
TheODSipilot is arequiredfeatureforveat-
free room heaters. The ODS/pilot shuts off
the hea3terif there is not enough fresh air.
Piezo Ignition System
This heaterhas apiezo ignitor. This system
requires no matches, batteries, or other
sources to right heater.
Thermostatic Heat Control
Thermostatmodels have athermostat sens-
ing bulb andacontrol valve. This resultsin
the greatest heater comfort.This can also
result in lower gas bills.
Figure 1-Vent-Free Propane/LP Gas Heater (30,000 Btu/Hr Model Shown)
LOCAL CODES UNPACKING
Installanduseheaterwithcare. Followalllocal 1.
codes. In the absence of local codes, use the 2.
latest editionof TheNational Fuel Gas Code
ANSIZ223.I, alsoknown as NFPA 54". 3.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quint.y, MA 02269
Remove heater from carton.
Remove all protective packaging ap-
pried to heater for shipment.
Check heater for any shipping damage.
tf heater is damaged, promptly inform
dealer where you bought heater.
le.o_ 3

BLUE FLAMEPROPANE/LP HEATER
AIR FOR
COMBUSTION AND
VENTILATION
_lb WARNING: This heater shall
not be installed in a confltled
space unless provisions are pro-
vided for adequate combustion
and ventilation air. Read the fol-
lowing instructions to insure
proper fresh air for this and other
fuel-burning appliances in your
home.
Today's homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
help reduce heat loss inhomes. Home owners
weather strip and caulk around windows and
doors to keep the cold airoutand thewarm 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 tobreathe. Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate 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 Venti-
lation.
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 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you most provide additional fresh air.
Unusually tight construction is de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 1_ 1_kg
per pa-sec-n_) or less with open-
ings gasketed or sealed an____d
b. weather stripping has been
added on openable windows and
doors an___d
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors, be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tions for plumbing, electrical, and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors, page 6.
If your home does not meet all of the
three criteria above, proceed to De-
termining Fresh-Air Flow For Heater
Location, page 5.
Confined and Unconfined Space
TheNational Fuel Gas Code (ANSI Z223:l,
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 ms
per kw) of the aggrega_ input rating of all
appliances installed in that space and an
unconfined space as a space whose volume
is not less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3per kw) of the aggregate
inputratingof anappliances installed inthat
space. Rooms communicating directly with
the space in which the appliances are in-
stalled*, through openings not furnished
with doors, are considered a part of the
unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
*Adjoining rooms are communicating only
if there are doorless passageways or ventila-
tion grills between them.
4104332

OWNER'S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet to determine if you have aconfined or unconfined space.
Space: Includes theroom inwhich you will installheaterplusany adjoiningrooms with doorless passageways orventilation grillsbetween
the rooms.
I. Determine the volume of the space (length x width x height).
Length x Width x Height = cu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) =2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grins 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: 2560 cu. ft. (volume of space) + 50 cu. ft. =51.2 or 51,200 (maximum Btu/Hr the space can support)
3. Add the BUdHrof all fuel burning appliances in the space.
Vent-free heater BtuiI-Ir
Gas water heater* Btu/Hr Example:
Gas furnace Btu/Hr Gas water heater 40,000 Btu/Hr
Vented gas heater Btu/Hr Vent-free heater +_._20000 Btu/Hr
Gas fireplace logs Btu/Hr Total =_000 Btu/Hr
Other gas appliances* + Btu/Hr
Total = Btu/Hr
*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
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/Hrused)
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/Hrused ismore than the maximum Btu/Hrthe space can support.
You must provide additional fresh air. Your options arc as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space providas an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C. Install alower Btu/Hr heater, if lower Btu/Hrsize 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.
_k WAR NING: If the area in which the heater may beoperated issmaller than that defined as an unconfined space,
provide adequate combustion and ventilation air by one ofthe methods described in the National Fuel Gas Code,
ANSI Z223.1, 1992, Section 5.3 or applicable local codes.
Continued
t043$2 5

BLUE FLAME.'PROPANE/LP HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventllatlon Air From Inside
Buildlng
This freshairwould come fromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide 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 1and 2, Figure2). You can also
remove door into adjoining room (see op-
tion 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 work-
sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
orspaces open to the outdoors. These spaces
include attics and crawl spaces.
IMPORTANT: Do not provide openings for
inlet oroutletairinto atticifattichasa thermo-
stat-controned power vent. Heated air enter-
ing the attic will activate the power vent.
Ventilation
Grills
intoAdjoining
Room,
Option1
Or
Remove
Doorinto
Adjoining
Room,
Option3
Verdila_onGdlls
IntoAdjoiningRoom,
DpUon2
Figure 2 -Ventilation Air from Inside Building
Outlet
Air To Attic
Inlet
Air
To
iiiiiiiiiiiiiiii
_] Crawl
Space
IIIIIIIIIIIIIIII
Inlet Air Ventilated
Crawl Space
Figure 3 -Ventilation Air from Outdoors
6104332

OWNER'S MANUAL
INSTALLATION
NOTICE: This heater is intended
for use as supplemental heat. Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heat source. If you have a central
heating system, you may run
system's circulating blower while
using heater. This will help circu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
NOTICE: A qualified service per-
son must install heater. Follow
all local codes.
CHECK GAS TYPE
Use only propane/LP gas. If your gas supply
is not propane/LP, 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.
•external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection * (see Figure 14,
page 10)
•sediment trap
• tee joint
• pipe wrench
• An A.G.A. design-certified manualshutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 18.
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 clear-
ances from floor, ceiling, and join-
ing wall.
You can locate heater on floor, away from a
wall. An optional floor mounting stand is
needed. Purchase the floor mounting stand
from your dealer. See Accessories, page 1g.
_k WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
•where curtains, furniture,
clothing, or other flammable
objects are lessthan 36 inches
from the front, top, or sides of
the heater
•as a fireplace insert
•in high traffic areas
• in windy or drafty areas
• k CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
IMPORTANT."Vent-free heaters add
moisture to the air. Although this is
beneficial, installing heater in rooms
without enough ventilation air may
cause mildew to form from too much
moisture. See Air for Combustion and
Ventilation, pages 4 through 6.
ACAUTION: If you Install the
heater In a home garage
•heater pilot and bumer must
be at least 18 Inches above
floor
• locate heater where moving ve-
hicle will not hit It
Forconvenience andefficiency, installheater
•where there is easy access foroperation,
inspection, and service
• in coldest part of room
An optional fan kit is available from your
dealer. See Accessories, page 18. If plan-
ning tousefan, locate heater nearan electri-
cal outlet.
Minimum
rTo Top
FLOOR Surface Of
Carpeting, Tile
Or Other
Combustible
Material
Figure4-MountingClearancesAs Viewed
FromFront ofHeater
Continued
I0€3_ 7

BLUE FLAME PROPANE/LP HEATER
INSTALLATION
Continued
THERMOSTAT SENSING
BULB
The thermostat sensing bulb has been placed
insidetheheater forprotection duringshipping.
Locating Thermostat Sensing
Bulb
1. Remove front panel of heater (see Fig-
ure 7).
2. Locate thermostat sensing bulb just
under burner assembly.
IMPORTANT: Attach thermostat sensing
bulb to back of heater for properoperation.
Attaching Thermostat Sensing
Bulb
1. Remove thermostat sensing bulb from
holders inside heater. Route through
slot opening in bottom of heater.
2. Place clamp on thermostat sensing bulb
as shown in Figure 5. Clamp is pro-
vided in hardware package.
3. Snap clamp into upper mounting hole
as shown in Figure 5. Mounting hole is
located on lower left edge on back of
heater. Make sure the thermostat sens-
ing bulb is pointing up.
Thermostat
Bulb
Figure5- Attaching ThermostatSensing
Bulb
INSTALLING HEATER TO
WALL
Mounting Bracket
The mounting bracket is local_l on back
panel of heater. R has been taped them for
shipping. Remove mounting bracket from
backpanel.
Figure 6 -Bracket Location
Removing Front Panel Of Heater
I. Remove two screws near bottom cor-
ners of front panel.
2. Liftstraightup on grillguardunlilit stops.
Grill guard wig slide up about 1/4".
3. Pull bottom of frontpanel forward, then
downward.
4. Remove cardboard packing from grill
and glass.
Attachingto wall stud: This method
providesthe strongest hold. Insertmounting
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 whichmethod better suits yourneeds;
Eithermethod will provide a secure hold for
the mounting bracket.
Marking Screw Locations
1. Tapemounting bracketto wall where
heater will be located. Make sure
mounting bracket is level.
AWARNING: Maintain minimum
clearances shown in Figure 8. If
you can, provide greater clear-
ancea from floor and joining wall.
2. Mark screw locations on wall (see Fig-
are 8).
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
3. Remove tape and mounting bracket
fromwal,:
Jl \ /I
/ Only Insert Mounting la _'4"
Screws Through Last I
Hole On EaCh End U n.
Figure 7- Removing Front Panel Of Heater 30,000 Btu/Hr Model
Methods For Attaching
Mounting Bracket To Wall
Only use last hole oneach 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
Only Insert Mou g 18 3/4"
SCllWS Throu h Last
20,000 Btu/Hr Models
Figure8 -MountingBracket Clearances
8to4332

OWNER'S MANUAL
INSTALLATION
Continued
Attaching Mounting Bracket To
Wall
Note: Wall anchors,mountingscrews,and
spacersarein hardwarepackage.The hard-
ware package is provided with heater.
Attaching to wall stud method
For attachingmounting brackettowall studs
1. Drill holes at marked locations using
9/64" drill bit.
2.
3.
4.
Placemounting bracketontowall. Line
uplasthole on eachend ofbracketwith
holes drilled hi wall.
Insertmounting screws throughbracket
and into wall studs.
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 I" deep.
2. Fold wall anchor as shown in Figure 9.
3. Insert wall anchor (wings first) into
hole. Tap anchor flush to wall.
4. For thin walls (liT' or less), insert red
key into wall anchor. Push red key to
"pop" open anchor wings.
IMPORTANT." Do not hammer key!
For thickwalls (over 1/2"thick)orsolid
walls, do not pop open wings.
Place mounting bracket onto wall. Line
up last hole on eachend of bracket with
wall anchors.
5.
6.
7.
Insert mounting screws through bracket
and into wall anchors.
Tighten screws until mounting bracket
is firmly fastened to wall.
Figure 9 -Folding Anchor
Figure 10 -Popping Open Anchor Wings
For Thin Walls
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.
Stand-Out
Tab
Mounting Bracket
(attached towall)
Figure 11 -Mounting Heater Onto
Mounting Bracket
Installing Bottom Mounting
Screws
1. Locate two bottom mounting holes.
These holes are near bottom on back
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 1through 4un-
derAttaching To WallAnchor Method.
If installing bottom mounting screw
into wall stud,drill holes atmarkedlo-
cations using 9/64" drillbit.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mount-
ing holes and wall anchor or drilled
hole.
7.
g.
Hold spacer in place with one hand.
With otherhand, insert mounting screw
through bottom mounting hole and
spacer. Place tip of screw in opening
of wall anchor or drilled hole.
Tighten both screws until heater is
firmly secured to wall. Do not over
tighten.
Note: Do not replace front panel atthis
time. Make gas connections and check
for leaks before replacing front panel
(see pages 10 and 11).
Figure 12 -Installing Bottom Mounting
Screws
Continued
w.o._ 9

BLUE FLAME PROPANE/LP HEATER
INSTALLATION
Continued
CONNECTING TO GAS
SUPPLY
NOTICE: A qualified service per-
son must connect heater to gas
supply. Follow all local codes.
CAUTION: Never connect
heater directly to the propane/LF
supply. This heater requires an
external regulator (not supplied).
Install the external regulator be-
tween the heater and propane/LP
supply.
The installer must supply anexternal regu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incoming gaspressure tobetween 11and 14
inches of water. If you do notreduce incom-
ing gas pressure, heater regulator damage
could occur. Install externalregulator with
the vent pointing down as shown in Figure
13. Pointing the vent down protects it from
freezing rain or sleet.
Propane/LP
Supply Tank
__ Extemal
Regulator
Down
Figure 13 - External Regulator With Vent
Pointing Down
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your localcodes. Use pipe oflarge
enough diameter to allow proper
gas volume to heater. If pipe is
too small, undue loss of pres-
sure will occur.
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 amanual shutoff
valve, union, and plugged 1/8" NFr tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
heater (see Figure 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 dogged heater valves.
I_]1=CAUTION: Use pipe j°lnt seal" [
ant that is resistent to liquid pe-
troleum (LP) gas.
Install sedimenttrap in supply line as shown
in Figure 14. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
ment trap where trapped matter is not likely
to freeze. Asediment trap traps moisture
and contaminants. "lifts keeps them from
going into heater controls. If sediment trap
is not installed or is installed wrong, heater
may not run properly.
IMF)ORTANT: Hold pressure regulator
with wrench when connecting it to gaspip-
ing and/or fittings.
Pressure
Regulator _
3/8' NPT
Heater
Cabinet
-Tee Joint
Test Reducer
Gauge ._ Bushing to
Connectio 1/8" NPT
n"l 1/8" NPT
-Plug Tap
Sediment._.. Tee Joint
Trap Pipe Nipple
Cap
Manual
Shutoff
Valve *
Typical Inlet Pipe
from Extemal
Regulator
(11" W.C. to
14"W.C.
Pressure)
Figure 14 -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 18.
10 Io4332

OWNER'S MANUAL
INSTALLATION
Continued
CHECKING GAS
CONNECTIONS
3. Check all joints frompropane/LP sup-
ply tank to manual shutoff valve (see
Figure 16). Apply mixture of liquid
soap and water to gas joints. Bubbles
forming show a leak.
4. Correctall leaks atonce.
r_WARNING: Test all gas pip-
ing and connections for leaks
after Installing or servicing. Cor-
rect all leaks at once.
_kWARNING: Never use anopen
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.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater. See guidelines under Con-
necting to Gas Supply, page 13.
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 ei-
ther using compressed air or opening
propane/LP supply tank valve.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing 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 Fig-
ure 15).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
Pressure Testing Heater Gas
Connections
1. Open manual shutoff valve (see Fig-
ure 15).
2. Open propane/LP supply tank valve.
3. Make sure control knob of heater is in
the OFF position.
4. Check all joints from manual shutoff
valve to thermostat gas valve (see Fig-
ure 16). Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn OffGas to
Appliance, page 12).
8. Replace front panel.
/[_ Open
Manual [/II \ \
Shutoff_[ (.XZ:_::_:-'
Valve _ _osed
Figure 15 -Manual Shutoff Valve
Propane/LP
///
".2*,
o'4
/.-:2
ThermostatGasValve
-- Valve
Figure 16 -Checking Gas Joints
OPERATING
HEATER
FOR YOUR SAFETY 1
READ BEFORE
LIGHTING
WARNING: If you do not fol-
low these instructions exactly, a
fire or explosion may result caus-
ing property damage, personal
injury or loss of life.
A.
B.
C.
D.
This appliance has a pilot which must
be lighted byhand. When lighting the
pilot, follow these instructions exactly.
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 sup-
plier, call the fire departmenL
Use only your hand to push in or torn
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.
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 un-
der water.
Continued
I0433Z 11

BLUE FLAME PROPANE/LP HEATER
OPERATING
HEATER
Continued
l LIGHTING l
INSTRUCTIONS
1. STOP.* Read the safety information,
page 11, column 3.
2. Make sure manual shutoff valve is
fully open.
3. Turn €ontrol knob €lockwise
to the OFF position.
4. Wait five (5) minutes to dear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP: Follow "B" in the safety in-
formation, page 11, column 3. If you
don't smell gas, go to the next step.
5. Turn control knob counterclockwise
to the PILOT position.
Press in control knob for five (5) sec-
onds (see Figure 17).
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, the con-
trol 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 14 through
16. 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.
7. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
Note: If pilot goes out, repeat steps
3 through 7. This heater has a safety
interlock system. Wait one (1) minute
before lighting pilot again.
g. Turn control knob counterclockwise
to desired heating level. The
main burner should light. Set control
knob to any heat level between HI
and LO.
CAUTION: Do not try to adjust
heating levels by using the
manual shutoff valve.
Ignitor Button Control Knob
Figure 17 -Control Knob In The OFF
Position
Therrnocouple IgnitorElectrode
Figure 18 - Pilot
I TOTURN OFF GAS TOAPPLIANCE 1
Shutting Off Heater
1. Turn control knob clockwise
to the OFF position.
2. Turn off all electric power to the ap-
pliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise _ to
the PILOT position.
THERMOSTAT
CONTROL
OPERATION
The thermostatic control used on these
models differs from standard thermo-
stats. Standard thermostats simply turn
on and off the burner. The thermostat
used on this heater senses the room tem-
perature. The thermostat adjusts the
amount of gas flow to the burner. This
increases or decreases the burner flame
height. At times the room may exceed the
set temperature. If so, the burner will
shut off. The burner will cycle back on
when room temperature drops below the
set temperature. The control knob canbe
set to any heat level between HI and LO.
Note: The thermostat sensing bulb mea-
surrs the temperature of air near the
heater cabinet. This may not always agree
with room temperature (depending on
housing construction, installation loca-
tion, room size, open air temperatures,
etc.). Frequent use of your heater will let
you determine your own comfort levels.
II
1.
2.
3.
4.
MANUAL LIGHTING
PROCEDURE
Remove front panel (see Figure 7,
page 8).
Follow steps 1through $ under Light-
ing Instructions.
With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
5. Replace front panel.
12 t043_

OWNER'S MANUAL
INSPECTING
BURNER
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 19 shows acorrect pilot flame pat-
tern. Figure 20 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.
If pilot flame pattern is incorrect, as shown
in Figure 20
•turn heater off (see To Turn Off Gas to
Appliance, page 12).
• see Troubleshooting, pages 14through 16.
Pilot Burner
Figure 19 -Correct Pilot Flame Pattern
\
Figure 20 - Incorrect Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 21 shows a correct burner flame
pattern. Figure 22 shows anincorrectburner
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.
CLEANING AND
MAINTENANCE
WARNING: Tum off heater I
and let cool before cleaning. I
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If burner flame pat-
tern shows yellow tipping, follow
instructions at bottom Qf_thjs
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.
Ifburner flamepattern is incorrect, asshown
in Figure 22
•turn heater off (see To Turn Off Gas to
Appliance, page 12).
• seeTroubleshooting, pagesl4throughl6.
_lb CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
_heaterJnspectedyearlybyaq uali-
fled service person. Heater may
need more frequent cleaning due
to excessive lint from carpeting,
bedding material, 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 orpressurized air
to clean.
Exterior
Use a soft cloth dampened with a mild
I'_ *L"..... Sro;p::drr w:t:dmitxture. Wipe the cabi-
CORRECT FLAME PAI"rERN
AT HIGH POSITION
Figure 21 -Correct Burner Flame Pattern
_Yellow
_ _Tipping
INCORRECT FLAME PATFERN
AT H_GH POSITION
Figure22 -Incorrect Burner Flame Pattern
lO,_ 13

BLUE FLAME PROPANE/LP HEATER
TROUBLESHOOTING
Note: All troubleshooting items are listed in
order of operation.
AWARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualified ser-
vice person should service and
repair heater.
I
CAUTION: Never use a wlrs, I
needle, or similar object to clean I
ODS/pllot.Thle can damage ODS/
pilot unit.
OBSERVED PROBLEM POSSIBLE CAUSE
When ignitor button is pressed, there is no 1. Ignitor electrode positioned wrong
spark at ODS/pilot 2. Ignitor electrode broken
REMEDY
3.
4.
5.
Ignitor electrode not connected to igni-
tor cable
Ignitor cable pinched or wet
Piezo ignitor nut is loose
6. Broken ignitor cable
7. Badpiezo ignitor
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
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition 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. Depleted gas supply
6. ODS/pilot is clogged
7. Gas regulator setting is not correct
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. Contact local propane/LP gas company
6. Clean ODS/pilot (see Cleaning and
Maintenance, page 13) or replace ODS/
pilot assembly
7. 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. Safety interlock system has been trig-
gered (thermostat models only)
4. Manual shutof valve not fully open
5. Tbermocouple connection loose at con-
trol valve
6. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/IYIIot
7. Thermocouple damaged
8. Control valve damaged
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Wait one minute for safety interlock sys-
tem to reset. Repeat ignition operation
4. Fully open manual shut-off valve
5. Hand tighten until snug, then tighten
1/4 turn more
6. A)Contact localpropane/LP gascompany
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 13) or replace ODS/
pilot assembly
7. Replace thermocouple
8. Replace control valve

OWNER'S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM POSSIBLE CAUSE REMEDY
Bumer does not light after ODS/pilot is lit 1. Burner orifice is clogged 1. Clean bumer (see Cleaning and Mainte-
nance, page 13) or replace burner orifice
2. Burner orifice diameter is too small 2. Replace burner orifice
3. Inlet gas pressure is too low 3. Contact local propane/LP gas company
Delayed ignition of burner 1. Manifold pressure is too low 1. Contact local propane/LP gas company
2. Barner orifice is clogged 2. Clean burner (see Cleaning and Mainte-
nance, page 13) or replace burner orifice
Burner backfiring during combustion 1. Burner orifice is clogged or damaged 1. Clean burner (see Cleaning and Mainte-
nance, page 13) or replace burner orifice
2. Burner damaged 2. Replace bumer
3. Gas regulator defective 3. Replace gas regulator
Yellow flame during burner combustion 1. Not enough air 1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 13)
2. Gas regulator defective 2. Replace gas regulator
Slight smokeorodorduringinitialoperation 1. Residues from manufacturing processes 1. Problem will stop after a few hours of
operation
Heater produces a whistling noise when 1. Turning control knob to HI position 1. Turn control knob to LO position and
burner is lit when burner is cold let warm up for a minute
2. Air in gas line 2. Operate burner until air is removed from
line. Have gas line checked by local pro-
pane/LP gas company
3. Observe minimum installation clear-
ances (see Figure 4, page 7)
4. Clean burner(see Cleaning and Mainte-
nance, page 13) or replace burner orifice
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
Continued

BLUE FLAME PROPANE/LP HEATER
TROUBLESHOOTING
Continued
•ILWARNING: 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 suppller's Instructions.
•If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operatingheater where impuritiesin airexist may create odors. Cleaning
supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet ortextiles,
etc., create fumes. These fumes may mix with combustion air and create odors.
OBSERVED PROBLEM POSSIBLE CAUSE REMEDY
Heater produces aclicking/ticking noise 1. Metal expanding while heating or con- l. This is common with most heaters. If
just after burner is lit or shut off tracting while cooling noise is excessive, contact qualified ser-
vice person
Heaterproduces unwanted odors l. Heater burning vapors from paint, hair 1. Ventilate room. Stop using odor cans-
spray, glues, etc. (see IMPORTANT ing products while heater is running
statement above)
2. Gas leak. SeeWarnlng statement at 2. Locate and correct all leaks (see Check-
top of page ing Gas Connections, page 11)
Heater shuts off in use (ODS operates) 1. Not enough fresh air is available 1. Openwindowand/urdoorfurventilation
2. Low line pressure 2. Contactlocal propane/LP gas company
3. ODS/pilot is partially clogged 3. Clean ODS/pilot (see Cleaning and
Maintenance, page 13)
Gas odoreven when control knob is in OFF 1. Gas leak. See Warning statement at 1. Locate andcorrect all leaks (see Check-
position top of page ing Gas Connections, page 11)
2. Control valve defective 2. Replace control valve
Gas odor during combustion 1. Foreign matter between control valve 1. Take apartgas tubing and remove for-
andburner eign matter
2. Gas leak. Sea Warning statement at 2. Locate and correct allleaks (see Check-
top of page ing Gas Connections, page 11)
Moisture/condensation noticed onwindows 1. Not enough combustion/ventilation air. 1. Refer toAir for Combustion and Venti-
lation requirements (page 4)

OWNER'S MANUAL
SPECIFICATIONS
Btu (Variable)
Type Gas
Ignition
Pressure Regulator Setting
CGP20TB/CGP20TLB
20,000 Btu/Hr Models
10,0(X)i20,000
Propane/LPOnly
Piezo
8"W.C.
Inlet Gas Pressure (in. of water)
Maximum 14"
Minimum 11"
Dimensions, Inches ffl x W x D)
Heater 23.5 x 18.5 x 8.0
Carton 25.8 x 21.3 x 10.1
Weight (pounds)
Heater 22
Shipping 27
CGP30TB/CGP30TL.B
30,000 Btu/Hr Models
15,000/30,000
Propane/LPOnly
Piezo
8" W.C.
14"
11"
23.5x25.9x8.0
25.8x28.7x10.1
30
35
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting.
Ifso, contact DESA International's Techni-
cal Service Department at 1-800-323-5190.
SERVICE
PUBLICATIONS
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.
SERVICE HINTS
When gas pressure is too low
•pilot will not stay lit
•burner will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
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 istoo low or
gas quality is bad. If so, contact your local
propane/LP gas supplier.
REPLACEMENT
PARTS
Note: Use only original replacement parts.
This will protect yourwarrantycoverage for
parts replaced under warranty.
Parts Under Warranty
Contactauthorizod dealers of this product.
If they can't supply original replacement
part(s), either contact your nearest Parts
Central (see page 19) or call DESA
International's Technical Service Depart-
ment at 1-800-323-5190 for referral infor-
mation.
When calling 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 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 (see page 19) 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

BLUE FLAME PROPANE/LP HEATER
ACCESSORIES
Purchase these heater accessories from your
local dealer, ff they can not supply these
accessories, eithercontact yournearestParts
Central (see page 19) or call DESA
International's Parts Department at 1-800-
972-7879 for referralinformation. You can
also write to the address listed on the back
page of this manual.
FAN KITS - GA3100A and
GA3200TA
For all models. Provides better heat distri-
bution. Makes heatermore efficient. Com-
plete installation and operating instructions
included.
Manually controlled-GA3100A. Includes
ON/OFF switch.
Thermostaticallycon_olled-GA3200TA.
Includesthreesettings:ON/OFF/AUTO.
FLOOR MOUNTING STAND
20,000 Btu/Hr Models
CGP20TLB - GA4500L -Ivory
CGP2OTB -GA4500 - Champagne
30,000 Btu/Hr Models
CGP30TLB -GA4510L -Ivory
CGP30TB -GA4510 -Champagne
For locating heater on the floor, away from
awall. Complete installation and operating
instructions included.
MANUAL SHUTOFF VALVE -
GA5010
For all models. Manual shutoffvalve with
1/8" NPT tap.

OWNER'S MAN UAL
PARTS
CENTRALS These Parts Centrals are privately owned businesses. They .have agreed to support our
customer's needs by providing original replacement partsand 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
601 Hope Street
Bowling Green, KY 42101
502-796-8406
1-800-654-8534
Four Flags Power Products
1115 Stateline Road
Niles, MI 49120
616-684-2697
1-800-268-4983
Master Service Center
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
833 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
Albany Ladder
1586-90 Central Avenue
Albany, NY 12205
NY, MA, VT
518-869-5335
1-800-354-7368
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 CarterDrive, Unit 21
West Chester, PA 19382
215-696-2670
1-800-368-0803
LA Porte's Parts & Service
2444 N. 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
_o,L3_ 19

BLUE FLAME PROPANE/LP HEATER
ILLUSTRATED
PARTS
BREAKDOWN
CGP20TB
CGP20TLB
CGP30TB
CGP30TLB
4\
/
/
7
20 1o,t3_