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104190
OWNER’S MANUAL
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting.
If so, contact DESA International’s
Technical Service Department at
1-800-323-5190.
CGN20TA
Btu (Variable) 10,000/20,000
Type Gas Natural Only
Ignition Piezo
Pressure Regulator Setting 3" W.C.
Inlet Gas Pressure (in. of water)
Maximum 10.5"
Minimum 4"
Dimensions, Inches (H 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
SPECIFICATIONS
SERVICE HINTS
When gas pressure is too low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
When gas quality is bad
• pilot will not stay lit
• burner will produce flames and soot
• heater will backfire when lit
You may feel your gas pressure is too low or
gas quality is bad. If so, contact your local
natural gas supplier.
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.
CLEANING
AND
MAINTENANCE
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air,
or small, soft bristled brush to clean.
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe the cabi-
net to remove dust.
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualified service person. Heater
may need more frequent clean-
ing due to excessive lint from
carpeting, bedding material, etc.
REPLACEMENT
PARTS
Note:
Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
Parts Under Warranty
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), either contact your nearest Parts
Central (see below) 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 below) 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