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104331
OWNER’S MANUAL
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting.
If so, contact DESA International’s Techni-
cal Service Department at 1-800-323-5190.
You can also visit DESA International’s
technical service web site at
www.desatech.com.
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.
CGN20TB/CGN20TLB CGN30TB/CGN30TLB
20,000 Btu/Hr Models 30,000 Btu/Hr Models
Btu (Variable) 10,000/20,000 15,000/30,000
Type Gas Natural Only Natural Only
Ignition Piezo Piezo
Pressure Regulator Setting 3" W.C. 3" W.C.
Inlet Gas Pressure (in. of water)
Maximum 10.5" 10.5”
Minimum 5" 5"
Dimensions, Inches (H x W x D)
Heater 23.5 x 18.5 x 8.0 23.5 x 25.9 x 8.0
Carton 25.8 x 21.3 x 10.1 25.8 x 28.7 x 10.1
Weight (pounds)
Heater 22 30
Shipping 27 35
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.
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 (page
19) or call DESA International’s Technical
Service Department at 1-800-323-5190 for
referral information.
When calling DESA International, have ready
• your name
• your address
• model and serial numbers 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 (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
REPLACEMENT
PARTS