VENTED PROPANE
GAS HEATERS
OWNER’S OPERATION AND INSTALLATION MANUAL
Models: CGB35P and CGB50P
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.
FOR YOUR SAFETY
— 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 per-
formed by a qualified installer, service
agency, or the gas supplier.
W ARNING: Improper installation,
adjustment, alteration, service, or
maintenance can cause property
damage, personal injury or loss of
life. 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.
®
Save this manual for future reference.
CONTENTS
SECTION PAGE
Safety Information.........................................................................3
Product Identification .................................................................... 5
Local Codes ................................................................................... 6
Unpacking .................................................................................... 6
Product Features ............................................................................ 6
Installing Heater ............................................................................6
Check Gas Type...................................................................... 6
Installation Items.....................................................................6
Locating Heater.......................................................................7
Venting Heater ........................................................................8
Connecting to Gas Supply ...................................................... 11
Checking Gas Connections..................................................... 13
Installing Glass Panels ............................................................14
Fresh Air For Combustion and Ventilation...................................16
Determining Fresh-Air Flow for Heater Location
Example 1: Locating Heater in Unconfined (Open) Area 17
Draft Hood Spillage Test............................................ 17
Providing Permanent Fresh-Air Ventilation .............. 18
Example 2: Locating Heater in Confined (Closed) Area..19
Ventilating Confined Area ......................................... 19
Operating Heater ........................................................................... 20
For Your Safety Read Before Lighting .................................. 20
Lighting Instructions............................................................... 20
Manual Lighting Procedure .................................................... 22
To Turn Off Gas To Appliance .............................................. 22
Inspecting Pilot and Burner Flame................................................ 23
Pilot Flame Pattern .................................................................23
Burner Flame Pattern .............................................................. 23
Cleaning and Maintenance ............................................................ 25
Troubleshooting.............................................................................26
Service Procedures ........................................................................30
Removing Control Valve and Burner Tube............................30
Removing Burner.................................................................... 31
Changing Burner Orifice ........................................................ 32
Technical Service .......................................................................... 33
Specifications ................................................................................ 33
Service Hints ................................................................................. 33
Ordering Replacement Parts..........................................................34
Parts Centrals................................................................................. 34
Accessories .................................................................................... 35
Illustrated Parts List ......................................................................36-38
Warranty Information.................................................................... Back Cover
2
100352
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s manual carefully and completely be-
fore 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 operating or venting properly. Get fresh air at once! Have heater
or heater venting system serviced. Some people are more affected by carbon
monoxide than others. These include pregnant women, people with heart or lung
disease or anemia, those under the influence of alcohol, and those at high altitudes.
Propane Gas: Propane gas is odorless. An odor-making agent is added to propane
gas. The odor helps you detect a propane gas leak. However, the odor added to
propane gas can fade. Propane 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.
1. A qualified service person must install heater and venting system.
2. Use only propane gas. Do not convert heater to use different fuel type.
3. Do not place propane supply tank(s) inside any structure. Locate propane supply
tank(s) outdoors.
4. If you smell gas
• Shut off gas supply.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
5. This heater must have fresh air for proper operation. If not, poor fuel combustion
and improper venting of flue gases will result. Carbon monoxide poisoning from
backed-up flue gases could occur. The State of California lists carbon monoxide
as a reproductive toxin under Proposition 65. Read the instructions under
for Combustion and Ventilation, pages 16 through 19 for complete information.
6. Never install the heater
• in a mobile home or a recreational vehicle.
• where curtains, furniture, clothing, or other flammable objects are less than 48
inches from the front, 53 inches from top, or 12 inches from right side and 6
inches from left side and back of heater.
• directly on carpeting, tile, or other combustible materials other than wood
flooring. Place heater on metal or wood panel extending the full width and
depth of heater.
• as a fireplace insert.
• in high traffic areas.
• in windy or drafty areas.
Fresh Air
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Continued
3
SAFETY
WARNINGS
Continued
INFORMATION
Continued
7. Provide the following minimum heater clearances from combustibles (as viewed
from the front of heater):
Front: 48 inches
Back: 6 inches
Top: 53 inches
Right Side: 12 inches
Left Side: 6 inches
8. Do not run heater
• where flammable liquids or vapors are used or stored
• under dusty conditions
9. Never place clothing or any flammable objects on the heater or venting system.
10. Heater and venting system surfaces are very hot during operation. Keep children
and adults away from hot surfaces to avoid burns or clothing ignition. Carefully
supervise young children when they are in the same room as heater. Heater will
remain hot for a time after shutdown. Let surface cool before touching.
11. Do not use heater as a cooking device.
12. Do not alter heater or its controls. Any change may create a safety hazard.
13. Turn off heater and unplug (if equipped with blower) and let cool before
servicing. Unless you need gas supply for testing, shut off manual shutoff valve
before servicing. Only a qualified service person should service and repair heater
and venting system.
14. Replace any safety screen or guard removed for servicing before running heater.
15. Do not use heater if any part has been under water. Immediately call a qualified
service person to inspect the heater and to replace any part of the control system and
any gas control which has been under water.
4
100352
PRODUCT
IDENTIFICATION
Control
Knob
Ignitor
Button
Lower Front
Access Panel
Draft Hood
Outlet for
Venting
System
Control
Valve
Figure 1 - Vented Propane Gas Heater
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Figure 2 - Vented Propane Gas Heater, Rear View
5
LOCAL CODES
Install and use heater with care. Follow all local codes. In the absence of local
codes, use the latest edition of the following:
• National Fuel Gas Code ANSI Z223.1, also known as NFPA 54 *
• National Electrical Code ANSI/NFPA 70 *
*Available from: American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
UNPACKING
PRODUCT
FEATURES
INSTALLING
HEATER
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.
Piezo Ignition System
This heater has a piezo ignitor. This system requires no matches, batteries, or other
sources to light heater.
Thermostatic Heat Control
This heater has a thermostat sensing bulb and a control valve. This results in the
greatest heating comfort. This can also result in lower gas bills.
WARNING
WARNING ICON G 001
A qualified service person must install heater and
venting system. Have them inspect heater before use
and at least annually. Follow all local codes.
NOTICE
This heater must be electrically grounded if equipped with
blower. Follow all local codes. In the absence of local
codes, follow the National Electric Code, ANSI/NFPA 70.
CHECK GAS TYPE
Use only propane gas. If your gas supply is not propane, do not install heater. Call
dealer where you bought heater for proper type heater.
INSTALLATION ITEMS
Before installing heater, make sure you have all items below.
• external regulator (supplied by
installer, see page 11)
• piping (check local codes)
• sealant (resistant to propane gas)
• manual shutoff valve *
• ground joint union
* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an
acceptable alternative to test gauge connection. Purchase the optional A.G.A.
design-certified manual shutoff valve from your dealer. See Accessories, page 35.
• test gauge connection * (see
Figure 7, page 12)
• sediment trap
• tee joint
• pipe wrench
• venting materials
6
100352
INSTALLING
LOCATING HEATER
HEATER
Continued
WARNING
WARNING ICON G 001
Maintain the minimum clearances shown in Figure 3,
below. If you can, provide greater clearances.
WARNING
WARNING ICON G 001
Never install the heater
• in a mobile home or a recreational vehicle.
• where curtains, furniture, clothing, or other flam-
mable objects are less than 48 inches from the front,
53 inches from the top, 12 inches from the right side
and 6 inches from the left side and back of heater.
• directly on carpeting, tile, or other combustible
materials other than wood flooring. Place heater on
metal or wood panel extending the full width and
depth of heater.
• as a fireplace insert.
• in high traffic areas.
• in windy or drafty areas.
CAUTION
WARNING ICON G 001
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.
• in coldest part of room.
• near an electrical outlet if you are planning to add blower to heater. See
Accessories, page 35 for blower.
CEILING
6"
Minimum
Left
Side
48" Minimum from
Front of Heater
53"
Minimum
Right
Side
6" Minimum
from Back
12"
Minimum
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Figure 3 - Heater Clearances
Continued
7
INSTALLING
HEATER
Continued
VENTING HEATER
Note:
Venting/chimney materials are not supplied with heater.
WARNING
A qualified service person must install the venting system
for this heater. If venting system is not properly installed
and maintained, the vent safety shut-off system will prevent the heater from running. Follow all local codes.
WARNING
This heater has a vent safety shut-off system. This
system shuts off the heater gas supply if you do not vent
heater properly or the venting system is blocked. Do not
operate heater if not properly vented. Do not tamper with
the vent safety shut-off system. Carbon monoxide poisoning and death may result.
WARNING
When venting this heater, follow the safety information
listed below.
•Never vent heater to another room or inside a building.
Only vent heater to the outdoors.
•Do not vent heater exhaust to a chimney or flue serving
another solid-fuel-burning or gas appliance.
•We recommend you use flues classified as prefabricated or
masonry all-fuel chimney or type-B vent. See
page 10.
•If using old vent, check vent for soot, creosote, and loose
particles. If vent is damaged, repair or replace it before
using heater.
•Extend the vertical section of vent pipe at least three feet
above roof penetration.
•Extend the vertical section of vent pipe at least two feet
above the highest point of any roof within ten feet.
•The horizontal run of vent pipe should rise at least 1/4
inch for each foot of run.
•Support the vent pipe at least every five feet along its
length. Do not use combustible materials to support vent
pipe.
•Never extend vent pipe horizontally through outside wall
and terminate. You must connect a vertical run of vent
pipe to the horizontal run. The vertical run must be at least
25% longer than the horizontal run.
•Install vent or chimney cap that is approved for use with
vented gas room heaters.
•Do not use vent pipe smaller in diameter than that of the
heater draft hood outlet.
•Do not use dampers in the vent pipes.
•Vertical height of vent must be greater than five feet
above vent connection at draft hood.
Vent Types,
8
100352
INSTALLING
VENTING HEATER
(continued)
HEATER
Continued
WARNING
Do not vent heater in any of the following ways (see Figure 4).
Heater must be vented to the outdoors. Never vent heater to another
room or inside a building.
The vertical section of vent pipe must
extend at least two feet above the
highest point of any roof within ten
feet.
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Never extend vent pipe horizontally
through outside wall and terminate.
You must connect a vertical run of
vent pipe to the horizontal run. The
vertical run must be at least 25%
longer than the horizontal run.
Less than 5' between elbows
Vertical run of pipe must be at least
five feet from elbow to elbow.
Figure 4 - Improper Venting Systems
Never extend vent pipe horizontally
through a chimney or flue. You must
connect a vertical run of vent pipe to
the horizontal run. The vertical run
must be at least 25% longer or five
feet minimum than the horizontal run.
Continued
9
INSTALLING
HEATER
Continued
VENTING HEATER
(continued)
Proper Size Vent
To safely vent heater, the vent connector pipe must be the same diameter as the draft
hood outlet on the rear of the heater. Pipe that is too small can cause flue gas to spill
from the heater. Fasten vent connector to the draft hood outlet with a sheet metal screw.
Vent Types
Prefabricated or Masonry All-Fuel Chimney - This is a masonry chimney or a
residential-type prefabricated chimney. Only use prefabricated chimneys listed by
Underwriters Laboratories (UL), Inc.
Type-B Vent - These vents are made of noncombustible, corrosion resistant
material. They are certified by a nationally recognized testing agency. Type-B
vents are doubleaccordance with the listing of the particular type-B vent. Type-B vents are currently
listed as B-1, B-1
The illustrations below show both vent types. The illustration shows typical
construction of each type of venting system. Minimum clearances and lengths are
added to the illustrations.
walled pipe. Clearances to combustible construction must be in
1
/2, and B-2.
Terminate at least 5' above draft hood.
If vent extends over 5' above roof,
support with guy wires or braces.
Vent Cap
Must Be At
Least 2 Feet
Above
Highest Point
Within 10
Feet.
Seal Around
Collar and
Flashing
10
5'
Min.
6"
Min.
Heater
sonry All-Fuel Chimney
Figure 5 - Typical Construction of Venting Systems
Maintain Listed
Clearance of Vent
Support If
Necessary
Lock Joints
Lock Joints
Vent
Connector
Position
Firestop
Maintain Listed
Clearance of
Vent
Vertical Vent
Heater
Type-B VentPrefabricated or Ma-
Lock
Joints
Support
Laterals
53"
Min.
100352
INSTALLING
CONNECTING TO GAS SUPPLY
HEATER
Continued
WARNING
A qualified service person must connect heater to gas
supply. Follow all local codes.
CAUTION
Never connect heater directly to the propane supply. This
heater requires an external regulator (not supplied). Install
the external regulator between the heater and propane
supply.
The installer must supply an external regulator. The external regulator will reduce
incoming gas pressure. You must reduce incoming gas pressure to between 11 and
14 inches of water. If you do not reduce incoming gas pressure, heater regulator
damage could occur. Install external regulator with the vent pointing down as
shown in Figure 6. Pointing the vent down protects it from freezing rain or sleet.
External Regulator
BULK PROPANE
TANK
Vent Pointing Down
Figure 6 - External Regulator with Vent Pointing Down
VENT
CAUTION
Use only new, black iron or steel pipe. Copper tubing may
be used in certain areas. Check your local codes. Use pipe
that is 1/2" in diameter or greater to allow proper gas
volume to heater. If pipe is too small, undue loss of pressure will occur.
The gas supply line to your heater must be 1/2 inch in diameter or larger. If the
supply line branches to serve two or more heaters, the line from the branch back to
the external regulator must be doubled or tripled, etc., in size (depending upon the
number of heaters).
branches to serve two heaters, the line diameter from the branch back to the
external regulator must be at least 1 inch. If three heaters are served, the line
diameter from the branch back to the external regulator must be at least 1 1/2
inches.
Example for 1/2 inch diameter supply line:
If the supply line
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Note:
If gas supply line total length exceeds forty feet, use a larger diameter pipe.
Use pipe that is the next size larger than the heater control valve fitting.
Continued
11
INSTALLING
HEATER
Continued
Installation must include a manual shutoff valve, ground joint union, plugged 1/8"
NPT tap and a sediment trap. Locate NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see Figure 7).
Apply pipe joint sealant lightly to male threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe could result in clogged heater valves.
CAUTION
Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown in Figure 7. 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:
Use two pipe wrenches when connecting gas piping to gas control
valve of heater. This will prevent turning or damaging control valve.
Acceptable
construction
Control
Valve
Ground
Joint
Union
Test
Gauge
Connection*
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Tee Joint
Sediment
Trap
Manual
Shutoff
Valve *
Tee Joint
Pipe
Nipple
Cap
of inlet gas
line
From External
Regulator (11"
W.C. Min** to
14" W.C. Max)
Preferred
construction
of inlet gas
line
From
External
Regulator
(11" W.C.
Min** to
14" W.C.
Max)
12
Figure 7 - 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 35.
** For purposes of input adjustment.
100352
INSTALLING
O
CHECKING GAS CONNECTIONS
HEATER
Continued
WARNING
Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once.
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.
CAUTION
Make sure external regulator has been installed between propane supply and heater. See guidelines under
Connecting to Gas Supply
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
pipe. Pressures in excess of 1/2 PSIG will damage heater regulator.
2. Cap off open end of gas pipe where manual shutoff valve was connected.
3. Pressurize supply piping system by either using compressed air or opening
propane supply tank valve.
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.
, page 11.
Test Pressures Equal To or Less Than 1/2 PSIG
1. Close manual shutoff valve (see Figure 8).
2. Pressurize supply piping system by either using compressed air or opening
propane supply tank valve.
3. Check all joints from propane supply tank to manual shutoff valve. Apply
mixture of liquid soap and water to gas joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas Connections
1. Open manual shutoff valve (see Figure 8).
2. Open propane supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from manual shutoff valve to control valve on heater. Apply
mixture of liquid soap and water to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 20 through 22). Check the rest of the
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 22).
On Position
P
100352
Figure 8 - Manual Shutoff Valve
Off Position
Continued
13
INSTALLING
HEATER
Continued
INSTALLING GLASS PANEL
1. Locate the glass panel package inside the back of the heater.
CAUTION
Before installing glass panels, inspect the edges. If you
notice any chips or cracks, do not install. If the surface on
either side is deeply scratched, do not install. If these
conditions exist, call DESA International’s Technical Service Department at 1-800-323-5190 for replacement glass
panels.
CAUTION
Do not operate heater without glass panels installed.
Operating heater without glass panels will damage front
of heater due to excess temperatures.
CAUTION
Glass panels may have sharp edges. Handle with care.
2. Remove lower front access panel of heater by removing two screws at upper
corners of panel. The lower front access panel covers the lower front access
area (see Figure 9).
3. Remove two screws on glass guard. Remove glass guard (see Figure 9).
4. Carefully insert one glass panel up through lower front access area (see Figure 10,
page 15).
5. Carefully slip glass panel behind hearth assembly (see Figure 10, page 15).
Glass
Guard
14
Lower Front
Access Panel
Figure 9 - Removing Lower Front Access Panel
100352
INSTALLING
HEATER
Continued
6. Insert top edge of glass panel into the upper glass retaining channel (see Figure 11).
Hearth
Assembly
Glass
Panel
Lower Front
Access Area
Figure 10 - Inserting Glass Panels
CAUTION
Make sure you insert top edge of glass panels into the
upper glass retaining channel. Do not install glass
panels with top edge of glass in front of the upper glass
retaining channel. Glass panels will not automatically
go into the channel. You must guide the glass panels
into it. Incorrect installation will damage front of heater
due to excess temperatures.
7. Lower glass into lower glass retaining channel (see Figure 12). Slide glass panel
all the way to the left side.
Note:
If you have chipped or cracked a glass panel during installation, do not
use. Contact DESA International’s Technical Service Department at 1-800323-5190 for a replacement glass panel.
8. Repeat steps 4 through 7 for all glass panels.
9. Reinstall glass guard. Reinstall lower front access panel of heater.
Upper Glass
Retaining
Channel
Lower Glass
Retaining
Channel
Lower Front
Access Area
1
Glass
Glass
Panel
2
Panel
Lower Glass
Retaining
Channel
1
2
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Figure 11 - Inserting Top Edge of
Glass Panel into Upper Glass
Retaining Channel
Figure 12 - Inserting Glass into
Lower Retaining Channel
Continued
15
FRESH AIR FOR
COMBUSTION
AND
VENTILATION
WARNING
This heater must have fresh air for proper operation. If
not, poor fuel combustion and improper venting of flue
gases will result. Carbon monoxide poisoning from
backed-up flue gases could occur. 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, it is not good to make it too
airtight. Your home needs to breath. If your home is too airtight, fresh air has little
chance of entering in. This could be dangerous if you have fuel-burning appliances.
These appliances need fresh, outside air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and fuel-burning appliances draw air from
the house to operate. This heater is a fuel-burning appliance. It uses air from inside
the house for combustion. It also uses this air as a draft for venting. This draft air
helps move combustion gases through the vent pipe to the outdoors. If your house
is too airtight, there is not enough fresh air for these items to use. Fresh air may
draw back into the house through venting flues and chimneys. This will keep fuelburning appliances from venting properly. This may cause them to release poisonous carbon monoxide gas into your home. It is very important to provide enough
fresh air to run all fuel-burning appliances.
DANGER
Carbon monoxide poisoning may lead to death!
Carbon monoxide is a colorless, odorless gas. Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness, and/or nausea. If you have
these signs, the heater may not be operating or venting properly. Get fresh air at
once! Have heater or heater venting system serviced. Some people are more
affected by carbon monoxide than others. These include pregnant women, persons
with heart and lung disease and anemia, those under the influence of alcohol, and
those at high altitudes.
16
100352
FRESH AIR FOR
Typical
Water
Heater
Match
Draft Hood
Vent Pipe
Heater
Match
Draft Hood
Opening
Vent Pipe
COMBUSTION
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Example 1: Locating Heater in Unconfined (Open) Area
AND
VENTILATION
Continued
NOTICE
An unconfined area has a minimum air volume of 50
cubic feet for each 1000 BTU/Hr input rating of all
appliances in the area (cubic feet equals length x width
x height of area). Include adjoining rooms only if there
are no doors between the rooms or if you add ventilation grills between the rooms (see
Area,
page 19).
In an open area, the air that leaks around doors and windows may provide enough
fresh air for combustion and ventilation.
Draft Hood Spillage Test
Follow the steps below to see if enough fresh air is available.
1. Close all windows and doors.
2. If you have a fireplace, start a fire. Build fire until flames are burning strongly.
3. Turn on all exhaust fans. These include exhaust fans for kitchen, bathroom,
water heaters (gas or electric), etc.
4. Turn on all vented gas appliances. These include any room heaters, water
heaters, clothes dryer, etc.
5. Wait ten minutes for drafts to regulate.
6. Check for draft-hood spillage at each vented gas appliance. Do this by holding
a lit match two inches from the draft opening (see Figure 13). If match flame
pulls toward the draft hood, there is no spillage. If match flame blows away
from the draft hood, there is spillage. This is a hazardous condition. See Draft
Hood Spillage, page 18.
Ventilating Confined
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Figure 13 - Checking for Draft Spillage
No Draft Hood Spillage: This shows there is enough fresh air in area for
appliances. Turn off all exhaust fans and appliances if desired.
Continued
17
FRESH AIR FOR
COMBUSTION
AND
Draft Hood Spillage: This is a hazardous situation. Draft hood spillage re-
leases poisonous carbon monoxide gas into your home.
DANGER
VENTILATION
Continued
Carbon monoxide poisoning may lead to death!
If draft hood spillage occurs, check for blocked flue connectors, vent pipes, and
chimneys. If you find blockage, remove. Test again for spillage. If spillage still
occurs or there was no blockage, you need more fresh, outside air in the house. You
must provide additional fresh-air ventilation. Follow the steps below at once.
A. Open a window near the appliance(s) at least two inches. Test again for
spillage. If spillage does not stop, open window more and retest. If spillage
stops, keep window open while running appliance(s). Supply fresh, outside
air by a permanent method as soon as possible. If spillage still occurs, leave
window open and go to next step.
B. If you have a fireplace, open a window or door near it at least two inches.
Test again for spillage. If spillage does not stop, open window or door more
and retest. If spillage stops, keep window or door open while using fireplace. Supply fresh, outside air by a permanent method as soon as possible.
If spillage still occurs, leave window or door open and go to next step.
C. If you have kitchen and bathroom exhaust fans, turn them off. Test again for
spillage. If spillage stops, do not use exhaust fans. Turn off circuit breakers for
fans if possible. Permanently supply fresh, outside air as soon as possible.
Providing Permanent Fresh-Air Ventilation
If draft hood spillage occurs, you must permanently supply fresh, outside air to the
inside of your house. Provide extra fresh air by using ventilation grills or ducts.
Connect these items directly to the outdoors or spaces open to the outdoors. These
spaces include attics and crawl spaces. If you install this heater in an area with
other gas appliances, you must total the BTU/Hr input rating of all appliances.
Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1. It lists fresh-air
requirements for fuel-burning appliances.
18
IMPORTANT
Do not provide openings for inlet or outlet air into attic
if attic has a thermostat controlled power vent.
Chimney
or Gas
Outlet
Air
Inlet
Air
Vent
Outlet
Air
Inlet Air
Figure 14 - Ventilation Air from Outdoors
Ventilated
Attic
To Attic
To
Crawl
Space
Ventilated
Crawl Space
100352
FRESH AIR FOR
Example 2: Locating Heater in Confined (Closed) Area
COMBUSTION
AND
VENTILATION
Continued
NOTICE
A confined area has an air volume of less than 50 cubic
feet for each 1000 BTU/Hr input rating of all appliances
in the area (cubic feet equals length x width x height of
area). Include adjoining rooms only if there are no doors
between the rooms.
If you install this heater in a confined area, you must provide additional fresh air.
Ventilating Confined Area
This fresh air would come from an adjoining open area or outdoors.
WARNING
The adjoining open area must have enough fresh,
outside air ventilation to supply any appliance in that
area plus the confined area. Follow instructions under
Example 1: Locating Heater in Unconfined (Open) Area,
page 17 to make sure fresh air ventilation is adequate.
When ventilating to an adjoining open area, 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 areas. Follow the National Fuel Gas Code NFPA 54/ANSI
Z223.1. It lists fresh-air requirements for fuel-burning appliances.
100352
12"
Ventilation Grills
Connecting Two Rooms
Ventilation
Grills into
Closet for
Hot Water
Heater
into Crawl Space in
Furnace Area or in
Closet with Water Heater
Figure 15 - Ventilation Air from Inside Building
to Meet Unconfined Space
12"
Recommended
Fresh Air Duct
After providing ventilation between rooms, check for draft hood spillage (see Draft
Hood Spillage Test, page 17). If draft hood spillage still occurs, provide more
ventilation between rooms or provide permanent ventilation from outdoors. See
Providing Permanent Fresh-Air Ventilation, page 18.
19
OPERATING
HEATER
WARNING
Heater and venting system surfaces are very hot during
operation. Keep children and adults away from hot surfaces to avoid burns and clothing ignition. Carefully supervise young children when they are in the same room as
heater. Heater will remain hot for a time after shut down. Let
surface cool before touching.
NOTICE
If operating heater for the first time, a slight odor will occur.
This odor will go away after a few hours of operation.
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. Never use tools. If
the knob will not push in or turn by hand, don’t try to repair it, call a qualified
service
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.
technician or gas supplier. Force or attempted repair may result in a fire or
20
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above.
2. If heater is equipped with a blower, turn off all electric power to the heater.
3. Make sure manual shutoff valve is fully open.
4. Locate control knob on top of heater. Fully depress control knob in any position
other than PILOT to shut off burner and pilot.
Ignitor Button
100352
Control Knob
DEPRESS
FOR OFF
LOW
Figure 16 - Control Knob and Ignitor Button
PILOT
HIGH
OPERATING
HEATER
Continued
5. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the
floor. If you smell gas, STOP! Follow “B” in the safety information at the top of
page 20. If you don’t smell gas, go to the next step.
6. Turn control knob clockwise
control knob for five seconds.
Note:
You may be running this heater for the first time after hooking up to gas
supply. If so, you may need to depress control knob in for 15 seconds or more.
This allows air to bleed from the gas system.
7. With control knob depressed, push down and release ignitor button. This will
light pilot. The pilot is attached to the front of burner. You can see pilot through
front glass of heater (see Figure 12). If needed, keep pressing ignitor button until
pilot lights.
Note:
If pilot does not stay lit, refer to Troubleshooting, pages 26 through 29.
Also contact a qualified service person or gas supplier for repairs. Until repairs
are made, light pilot with match. To light pilot with match, see Manual Lighting
Procedure, page 22.
8. Keep control knob depressed for 30 seconds after lighting pilot. After 30 seconds,
release control knob.
• If control knob does not pop up when released, contact a qualified service
person or gas supplier for repairs.
• Shut off gas immediately.
Note:
If pilot goes out, repeat steps 4 through 8.
9. If heater is equipped with a blower, turn on all electrical power to the heater.
to the PILOT position. Fully depress
Clockwise
10. Turn control knob counterclockwise
11. If equipped, turn blower control to the AUTO or ON position (if desired).
to desired setting.
C-clockwise
CAUTION
Do not try to adjust heating levels by using the manual
shutoff valve.
100352
Figure 17 - Viewing Pilot
21
OPERATING
MANUAL LIGHTING PROCEDURE
HEATER
Continued
1. Remove lower front access panel on heater.
2. Locate pilot. Pilot is attached to the front of burner.
3. Follow steps 1 through 6 under Lighting Instructions, pages 20 and 21.
4. With control knob depressed, strike match. Hold match to pilot until pilot lights.
5. Follow steps 8 through 11 under Lighting Instructions, page 21.
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
1. Fully depress control knob in any position other than PILOT to shut off burner
and pilot.
2. If equipped, turn blower control to OFF position.
Shutting Off Burner Only (pilot stays lit)
1. Turn control knob to the PILOT position. At this setting, only the pilot remains lit.
22
100352
INSPECTING
PILOT AND
BURNER
FLAME
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot flame pattern. Figure 19 shows an incorrect pilot
flame pattern. The incorrect pilot flame is not touching the thermocouple. This will
prevent the thermocouple from getting hot, causing the heater to shut down.
Thermocouple
Figure 18 - Correct Pilot
Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 19
• turn heater off (see To Turn Off Gas to Appliance, page 22)
• contact a qualified service person
Figure 19 - Incorrect
Pilot Flame Pattern
Thermocouple
BURNER FLAME PATTERN
Note:
To view burner flame, look through front glass of heater.
Figure 20, page 24 shows a correct burner flame pattern. Figure 21, page 24 shows
two incorrect burner flame patterns. The two incorrect flame patterns show high
yellow flames and flames lifting off of burner.
100352
WARNING
If high yellow flame occurs, your heater could produce
increased levels of carbon monoxide. If burner flame is
incorrect, follow instructions on page 24.
NOTICE
Do not mistake orange flames with yellow flame. Dirt or
other fine dust particles enter the heater and burn
causing brief patches of orange flame.
Continued
23
INSPECTING
PILOT AND
BURNER
Sharp Blue
Flame
FLAME
Continued
Figure 20 - Correct Burner Flame Pattern
High
Yellow
Flame
Flame
Lifting
Off of
Burner
Figure 21 - Incorrect Burner Flame Patterns
If burner flame pattern is incorrect, as shown in Figure 21
• turn heater off (see To Turn Off Gas to Appliance, page 22)
• see Troubleshooting, pages 26 through 29.
24
100352
CLEANING
AND
MAINTENANCE
WARNING
Turn off heater and let cool before cleaning or servicing.
WARNING
Keep heater clear and free from combustible materials,
gasoline, and other flammable vapors and liquids.
CAUTION
You must keep control areas, burner, and circulating air
passageways of heater clean. Inspect these areas of
heater before each use. Have heater and venting system
inspected yearly by a qualified service person. Heater
may need more frequent cleaning due to excessive lint
from carpeting, bedding material, etc.
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.
COMBUSTION CHAMBER AND BURNER
Clean the combustion chamber and burner if you have run the heater with a high
yellow flame. Incomplete combustion from lack of air causes the yellow flame.
This will deposit soot inside the combustion chamber and on the burner. To clean
combustion chamber and burner, you must remove the burner from heater. See
Service Procedures, page 31, to remove burner. After removing burner, blow inside
of combustion chamber clean with compressed air. Clean burner with a soft-bristled
brush. Blow soot from burner with compressed air.
PILOT
Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean.
BURNER ORIFICE
Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean. You
can also use a tooth pick to clean orifice. Do not enlarge or damage orifice hole.
PILOT AND BURNER FLAME
Check the pilot and burner flame monthly. Make sure pilot and burner flame is
burning correctly. See Inspecting Pilot and Burner Flame, page 23.
VENTING SYSTEM
Check the venting system at least once a year. Make sure joints are secure and vent
pipe is in good condition. Do not obstruct combustion and ventilation air entering
the rear of heater.
100352
25
TROUBLE-
SHOOTING
Note:
All troubleshooting
items are listed in order of
operation.
WARNING
Turn off and unplug heater and let cool before servicing.
Unless you need gas supply for testing, shut off manual
shutoff valve before servicing. Only a qualified service
person should service and repair heater and venting
system.
CAUTION
Never use a wire, needle, or similar object to clean pilot.
This can damage pilot.
26
OBSERVED
PROBLEM
When ignitor button is
pressed, there is no
spark at pilot.
When ignitor button is
pressed, there is spark
at pilot but no ignition.
POSSIBLE
CAUSE
1. Incorrect spark gap.
2. Ignitor electrode positioned wrong.
3. Ignitor electrode broken.
4. Ignitor electrode not connected to ignitor cable.
5. Ignitor cable pinched or
wet.
6. Piezo ignitor nut is loose.
7. Broken or frayed ignitor
cable.
8. Loose ignitor cable.
9. 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. Depleted gas supply.
6. Pilot is clogged.
7. Gas regulator setting is
not correct.
REMEDY
1. Adjust spark gap to 1/16".
2. Replace ignitor.
3. Replace ignitor.
4. Reconnect ignitor cable.
5. Free ignitor cable if
pinched by any metal or
tubing. Keep ignitor
cable dry.
6. Tighten nut holding piezo
ignitor to heater cabinet.
Nut is located inside
heater cabinet at top.
7. Replace ignitor cable.
8. Reconnect ignitor cable.
9. 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. Contact local propane gas
company.
6. Clean pilot (see Cleaning
and Maintenance, page
25) or replace pilot assembly.
7. Replace control valve.
100352
TROUBLE-
SHOOTING
Continued
OBSERVED
PROBLEM
Pilot lights but flame
goes out when
control knob is
released.
POSSIBLE
CAUSE
1. Manual shutoff valve
not fully open.
2. Control knob not fully
pressed in.
3. Control knob not
pressed in long enough.
4. Safety interlock system
has been triggered.
5. Thermocouple connection loose at control
valve.
6. Pilot flame not touching
thermocouple, which
allows thermocouple to
cool, causing pilot
flame to go out. This
problem could be
caused by any or all of
the following:
A) Improperly adjusted
pilot flame
B) Low gas pressure
C) Dirty or partially
clogged pilot
7. Thermocouple damaged.
8. Control valve damaged.
REMEDY
1. Fully open manual shutoff valve.
2. Press in control knob
fully.
3. After pilot lights, keep
control knob pressed in
30 seconds.
4. Wait one minute for
safety interlock system
to reset. Repeat ignition.
5. Hand tighten until snug,
then tighten 1/4 turn
more.
6. A) Contact qualified
service person to properly adjust pilot flame.
B) Contact local propane gas company.
C) Clean pilot (see
Cleaning and Maintenance, page 25) or
replace pilot assembly.
7. Replace thermocouple.
8. Replace control valve.
Burner does not light
after pilot is lit.
Delayed ignition of
burner.
1. Safety interlock system
has been inadvertently
triggered.
2. Burner orifice is
clogged.
3. Burner orifice diameter
is too small.
4. Inlet gas pressure is too
low.
1. Manifold pressure is too
low.
2. Burner orifice is
clogged.
1. Fully depress control
knob in any position
other than pilot and release. Wait one minute
for safety interlock system to reset. Repeat ignition.
2.
Clean burner (
ing and Maintenance,
page 25
burner orifice.
3. Replace burner orifice.
4. Contact local propane
gas company.
1. Contact local propane
gas company.
2. Clean burner (see
Cleaning and Maintenance, page 25 or re-
place burner orifice.
see Clean-
) or replace
100352
Continued
27
TROUBLE-
SHOOTING
Continued
OBSERVED
PROBLEM
Burner backfiring
during combustion.
POSSIBLE
CAUSE
1. Burner orifice is
clogged or damaged.
2. Burner damaged.
3. Gas regulator defective.
4. Delayed ignition.
REMEDY
1. Clean burner (see Cleaning and Maintenance,
page 25) or replace
burner orifice.
2. Replace burner.
3. Replace control valve.
4. See above.
Yellow flame during
burner combustion.
Slight smoke or odor
during initial operation.
Burner fails to respond to thermostat.
1. Not enough air.
2. Gas regulator defective.
1. Residues from manufacturing processes.
1. Pilot flame not lit.
2. Pilot flame not properly
heating end of thermocouple.
3. Pilot burner orifice
clogged or damaged.
4. Control valve defective.
5. Temperature at thermostat bulb satisfied.
1. A) Check burner for dirt
and debris. If found, clean
burner (see Cleaning and
Maintenance, page 25).
2. Replace control valve.
1. Problem will stop after a
few hours of operation.
1. Light pilot burner (see
Lighting Instructions,
page 20).
2. Pilot flame needs adjusting. Contact a qualified
service person.
3. Clean pilot burner (see
Cleaning and Maintenance, page 25).
4. Replace control valve.
28
Heater produces a
whistling noise when
burner is lit.
1. Air in gas line.
2. Air passageways on
heater blocked.
3. Dirty or partially
clogged burner orifice.
1. Operate burner until air is
removed from line. Have
gas line checked by local
propane gas company.
2. Observe minimum installation clearances (see
Figure 3, page 7).
3. Clean burner (see Clean-
ing and Maintenance,
page 25) or replace
burner orifice.
100352
TROUBLE-
SHOOTING
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.
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.
POSSIBLE
CAUSE
1. Metal expanding while
heating or contracting
while cooling.
1. Heater burning vapors
from paint, hair spray,
glues, etc.
2. Low fuel supply.
3. Gas leak. See Warning
statement at top of
page.
1. Heater not venting
correctly. Vent safety
switch shuts off heater.
2. Low line pressure.
3. Pilot partially clogged.
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. Refill supply tank.
3. Find and correct all leaks
(see Checking Gas
nections, page 13).
1. Check venting system. If
damaged or blocked, repair. If venting system is
OK, have qualified service person replace vent
safety switch, wire harness, or thermocouple interrupter.
2. Contact local propane gas
company.
3. Clean pilot (see Cleaning
and Maintenance, page
25).
Con-
100352
Gas odor even when
control knob is in OFF
position.
Gas odor during combustion.
1. Gas leak. See Warning
statement at top of
page.
2. Control valve damaged.
1. Foreign matter between
control valve and burner.
2. Gas leak. See Warning
statement at top of
page.
3. Foreign fumes in area of
heater being drawn
through burner combustion.
1. Find and correct all leaks
(see Checking Gas
nections, page 13).
2. Replace control valve.
1. Take apart gas tubing and
remove foreign matter.
2. Find and correct all leaks
(see Checking Gas
nections, page 13).
3. Ventilate area around
heater to remove any foreign fumes.
Con-
Con-
29
SERVICE
PROCEDURES
Removing Control Valve
and Burner Tube
1. Shut off gas supply to
heater.
2. Remove lower front
access panel on heater.
3. Disconnect burner tube
from orifice holder (see
Figure 22).
4. Remove pilot gas line
from control valve (see
Figure 22).
5. Disconnect wire connectors from thermocouple
interrupter (see Figure
22).
6. Remove thermocouple
and thermocouple interrupter from control valve.
7. Remove cotter pin from
control valve. This
releases the control rod
from valve (see Figure
22).
8. Remove the two mounting
screws from control valve
mounting bracket (see
Figure 22).
9. Remove assembly from
the rear of heater.
10.To reinstall, reverse above
steps. Turn on gas to
heater and check for gas
leaks. Apply a mixture of
liquid soap and water to
all joints. Bubbles forming
show a leak. Correct all
leaks at once.
11.Replace lower front
access panel.
WARNING
Turn off and unplug heater and let cool before servicing.
Unless you need gas supply for testing, shut off manual
shutoff valve before servicing. Only a qualified service
person should service and repair heater and venting
system.
Control Rod
Control Valve
Bracket
Orifice
Holder
Thermocouple
Interrupter
Thermocouple
Figure 22 - Removing Control Valve and Burner Tube
Control Valve
Wire Connector
Burner Tube
Pilot Gas Line
Wire Connector
Cotter Pin
Mounting
Screw
30
100352
SERVICE
PROCEDURES
Continued
Removing Burner
1. Shut off gas supply to
heater.
2. Remove lower front
access panel on heater.
3. Disconnect burner tube
from orifice holder (see
Figure 23).
4. Remove orifice holder
from burner (see Figure
23).
5. Remove pilot burner
bracket nuts and remove
pilot assembly (see Figure
23).
6. Move burner to the right
for clearance. Rotate
burner 90° and remove
burner through lower front
access opening.
7. To reinstall, reverse above
steps. Turn on gas to
heater and check for gas
leaks. Apply a mixture of
liquid soap and water to
all joints. Bubbles forming show a leak. Correct
all leaks at once.
8. Replace lower front
access panel.
Burner
Burner
Tube
Pilot Burner
Bracket Nut
Figure 23- Removing Burner Tube, Orifice Holder, and Pilot Burner Assembly
Pilot Burner
Assembly
Orifice
Holder
(35,000 BTU/Hr Burner Shown)
Continued
100352
31
SERVICE
PROCEDURES
Continued
Changing Burner Orifice
1. Shut off gas supply to
heater.
2. Remove lower front
access panel on heater.
3. Disconnect burner tube
from orifice holder (see
Figure 24).
4. Remove orifice holder
from burner (see Figure
24).
5. Use socket or open-end
wrench to remove the old
orifice from the orifice
holder.
6. Clean and replace orifice,
or replace with new
orifice.
7. Turn on gas to heater and
check for gas leaks. Apply
a mixture of liquid soap
and water to all joints.
Bubbles forming show a
leak. Correct all leaks at
once.
8. Replace lower front
access panel.
Burner
Orifice
Burner
Tube
Orifice
Holder
Figure 24 - Orifice Location (35,000 BTU/Hr Burner Shown)
32
Figure 25 - Orifice
100352
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.
SPECIFICATIONS
SERVICE
HINTS
35,000 BTU/Hr 50,000 BTU/Hr
Model Model
BTU 35,000 50,000
Type Gas Propane Only Propane Only
Ignition Piezo Piezo
Pressure Regulator Setting 10.5" W.C. 10.5" W.C.
Inlet Gas Pressure
Maximum 14" W.C. 14" W.C.
Minimum 11" W.C. 11" W.C.
Dimensions, Inches
Heater (H x W x D) 25 x 27
Shipping Weight (pounds) 78 98
Flue Vent Size 4" dia. 4" dia.
Orifice Size 52 drill, ø .0635 46 drill, ø .081
Note:
These heaters are certified for elevations of 0-4500 feet above sea level. For
elevations above 2000 feet, de-rate heater 4% for each 1000 feet above sea level.
When gas pressure is too low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
• propane gas supply may be low
When gas quality is bad
• pilot will not stay lit
• burner will produce yellow 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 propane gas supplier.
1
/4 x 16 28 x 32 1/2 x 16
100352
33
ORDERING
REPLACEMENT
PARTS
Note:
Use only original replacement parts. This will protect your warranty cover-
age for parts replaced under warranty.
Parts Under Warranty
Contact your nearest dealer or call DESA International’s Technical Service Department at 1-800-323-5190.
When calling DESA International, 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 defective part to the factory.
Parts Not Under Warranty
Contact your nearest dealer. If they can’t supply original replacement part(s),
either contact your nearest Parts Central (below) or call DESA International’s Parts
Department at 1-800-972-7879.
When calling DESA International, have ready
• model number of your heater
• the replacement part number
34
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. For
certain parts, some Parts Centrals may refer you to a dealer in your area. When
calling a Parts Central, ask for the Parts Department.
Howard Industries
1514 South Maple Ave.
Los Angeles, CA 90015
213-747-5121
Victor Manufacturing
42 Rumsey Road
E. Hartford, CT 06108
NY, NJ, DE, PA, MD
203-289-4223
Controlled Engineering
299 Roosevelt Road
Glen Ellyn, IL 60137
708-469-7300
Portable Heater Parts
342 N. County Rd 400E
Valparaiso, IN 46383
All States
219-462-7441
1-800-362-6951
FBD
601 Hope Street
Bowling Green, KY 42101
502-796-8406
800-654-8534
American Air Dist.
537 W. 62nd Street
Shreveport, LA 71108
318-861-0634
Master Service Center
1184 Wilson
Grand Rapids, MI 49504
616-791-4760
800-446-1446
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108
KS, MO, AR
816-842-3911
Controls, Inc.
6820 Glenwood Ave.
Raleigh, NC 27612
NC, SC, VA, MD
919-787-2242
1-800-334-5886
Taratin Tank Co.
P.O. Box 6129
Freehold, NJ 07728
908-780-9340
800-922-0724
East Coast Energy
707 Broadway
W. Long Branch, NJ 07764
908-870-8809
1-800-755-8809
ATP Services
990 Avenue of Americas
New York, NY 10018
212-967-6255
Dayton Hardware
P. O. Box 275
North Dayton Station
Dayton, OH 45404
All States
513-258-3721
OH only 1-800-762-3426
Central Air Supply
424 North Rockwell
Oklahoma City, OK 73127
405-495-0014
Warmer Image/Halco
Enterprises
208 Carter Dr., Unit 21
West Chester, PA 19382
215-696-2670
1-800-368-0803
LaPorte’s Parts & Service
2444 North 5th Street
Hartsville, SC 29550
803-879-3009
Cans Unlimited, Inc.
P. O. Box 645
Taylor, SC 29687
All States
803-879-3009
1-800-845-5301
Dealers LP Equip. Co.
P.O. Box 341145
Bartlett, TN 38184
Al, TN
901-386-8780
800-428-8902
Capitol Hydronic Supply
104 West Jefferson Street
Falls Church, VA 22046
703-416-8555
Tuco Industrial Products
P.O. Box 5076
Lynwood, WA 98046
206-743-9533
1-800-735-1268
Auer Steel & Heating Supply
2935 W. Silver Spring Dr.
Milwaukee, WI 53209
414-463-1234
100352
ACCESSORIES
Purchase these heater accessories from your local dealer. If they can not supply
these accessories, either contact your nearest Parts Central (see page 34) or call
DESA International’s Parts Department at 1-800-972-7879. You can also write to
the address listed on the back page of this manual.
BLOWER KIT - PART NUMBER GA6010
For all models. Provides better heat distribution.
Makes heater more efficient. Complete installation
and operating instructions provided with blower.
100352
MANUAL SHUTOFF
VALVE - GA5010
For all models. Manual shutoff valve
with 1/8" NPT tap.
35
ILLUSTRATED
PARTS LIST
Burner
Assembly
1
3
2
4
25
26
24-1
24-2
16
23
7
24
24-3
24-4
17
22
27
7
28
21
20
19
13
15
5
50 Model
35 Model
10
9
11
6
7
6
8
11
12
14
36
18
4
16
17
100352
PARTS LIST
Burner
Assembly
KEY PART NUMBER FOR
NO. CGB50P CGB35P DESCRIPTION QTY.
1 100206-02 100206-01 Combustion Chamber 1
2 098324-02 098324-02 Control Knob 1
3 097159-02 097159-02 Piezo Ignitor 1
4 098271-05 098271-05 Ignitor Cable 1
5 099974-02 099974-01 Control Rod 1
6 099704-05 063015 Limit Switch Bracket Kit 1
7 —— M11084-26 Screw, #10-16 x 3/8" 3
M11084-26 —— Screw, #10-16 x 3/8" 2
8 099986-01 099986-01 Thermocouple Wire Assembly 1
9 100000-01 100000-01 Cotter Pin 1
10 231939 231940 Limit Switch 1
11 M11084-38 —— Screw, #8-18 x 3/8" 3
—— M11084-38 Screw, #8-18 x 3/8" 2
12 099211-01 099211-01 Screw, #10-16 x 2 1/2" 2
13 100207-02 100207-02 Control Valve 1
14 098265-01 098265-01 Elbow 1
15 098936-02 098936-02 Thermocouple Interrupter 1
16 100028-02 100028-02 Pilot Tubing 1
17 100307-01 100307-01 Thermocouple 1
18 099976-02 099976-02 Burner Tube 1
19 530988 530988 Control Bracket 1
20 100309-01 100309-01 Orifice Holder 1
21 530124 100469-01 Orifice 1
22 100385-01 100384-01 Burner Assembly 1
23 100090-01 100090-01 Burner Bracket 1
24 100308-02 100308-02 Pilot Assembly 1
24-1 100467-01 100467-01 Pilot Sleeve 1
24-2 100466-01 100466-01 Pilot Nut 1
24-3 100468-01 100468-01 Pilot Electrode 1
24-4 100465-01 100465-01 Nut Electrode 1
25 101342-05 101342-04 Glass Panel Package
26 098249-01 098249-01 Nut, M5 x 0.8 2
27 530192 530192 Glass Spring 2
28 098304-01 098304-01 Screw, #10-24 x 3/8" 3
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under Ordering Replacement Parts on page 34 of this
manual.
(includes bottom glass retainer) 1
100352
37
ILLUSTRATED
PARTS LIST
Cabinet
Assembly
4
3
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under Ordering Replacement Parts on page 34 of this
manual.
6
10
8
11
7
9
6
5
2
1
KEY
NO. CGB50P CGB35P DESCRIPTION QTY.
1 100202-02 100202-01 Lower Front Panel 1
2 098304-01 098304-01 Screw, #10-16 x 3/8" 2
3 100053-02BR 100053-01BR Hearth Assembly 1
4 100204-02 100204-01 Top Panel 1
5 098304-02 098304-02 Screw, #6-20 x 3/8" 2
6 M11084-26 —— Screw, #10-16 x 3/8" 17
—— M11084-26 Screw, #10-16 x 3/8" 19
7 100205-02BR 100205-01BR Glass Guard 1
8 100203-02 100203-01 Cabinet Assembly 1
9 099123-01 099123-01 Thermobulb Clip 2
10 100101-02BS 100101-01BS Cabinet Back 1
11 099997-01 099997-01 Switch Plug 1
099988-02 099988-02 Lighting Instructions Decal 1
099987-02 099987-02 Control Position Decal 1
100154-02 100154-02 Warning Decal 1
6
PART NUMBER FOR
(includes items 5 & 7)
PARTS AVAILABLE - NOT SHOWN
38
100352
NOTES
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100352
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39
WARRANTY INFORMATION
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 VENTED PROPANE GAS HEATERS
LIMITED ONE YEAR WARRANTY
This DESA product is warranted to the original purchaser to be free from defect in material and workmanship under normal use and
maintenance for a period of one year from the date of installation whether or not actual use begins on that date. It is the responsibility of
the consumer/owner to establish the warranty period. You are required to furnish proof of installation date, which may be a Bill of Sales
or other payment record which verifies the original installation. A new or remanufactured part to replace any defective part will be provided,
at DESA’s sole option, without charge for the part itself, FOB the shipping point. The exchanged part will be warranted for only the
unexpired portion of the original warranty. Defective parts must be returned to DESA, transportation charges prepaid, (DESA is not
responsible for any freight charges), where DESA will establish to its sole satisfaction that the part was or became defective under normal
use and maintenance. No reimbursement will be made for transportation, diagnostics, shipping, handling, or other incidental expenses. This
warranty applies only to the product in its original installation location and is voided if the product is reinstalled elsewhere.
LIMITED FOUR YEAR WARRANTY ON COMBUSTION CHAMBER
During the second through fifth years after the date of original installation, DESA further warrants the combustion chamber against defects
in material and workmanship under normal use and maintenance. A replacement combustion chamber will be provided under the same
conditions as stated in the one year warranty.
LIMITATION OF WARRANTIES
All implied warranties (including implied warranties of merchantability) are hereby limited in duration to the period for which each limited
warranty is given. Some states do not allow limitations on how long an implied warranty lasts so the above limitations may not apply to
you. The expressed warranties made in this warranty are exclusive and may not be altered, enlarged, or changed by any distributor, dealer,
or other person whomsoever.
DESA WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the owner’s operation and installation manual including cleaning of component parts; such as,
orifices and burners.
2. Failure to start and/or operate due to voltage or gas condition, blown fuses, open circuit breakers, loose or disconnected wires, low gas
pressure, or other damages due to inadequacy or interruption of electrical service or gas supply.
3. Damage or repairs required as a consequence of faulty or incorrect installation not in conformance with DESA instructions.
4. Damage as a result of floods, winds, lightning, accidents, corrosive atmosphere, or other conditions beyond the control of DESA.
5. Parts or accessories not supplied by DESA.
6. Costs incurred in gaining access to the heater.
7. Damage or repairs needed as a consequence of any misapplication, abuse, unreasonable use, unauthorized alteration, improper
servicing, improper operation, or failure to provide reasonable and necessary maintenance.
8. Freight charges incurred from parts replacement.
9. DESA product installed outside the Continental U.S.A. and Alaska.
10. DESA products whose serial number has been altered, defaced, or removed.
11. Fuel or electricity costs or increases in such costs from any reason whatsoever.
12. Any special, indirect or consequential property, economic, or commercial damage of any nature whatsoever. Some states do not allow
the exclusion of incidental or consequential damages, so the above limitation may not apply to you.
No representative, dealer, or other person is authorized to assume for DESA International any additional, different, or other liability in
connection with the sale of this DESA product.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
For more information about this warranty, write:
DESA
INTERNATIONAL
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
100352-01
REV. C
6/94
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