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119344-01B 23
SPECIFICATIONS
WMN20A, GWN20TA
• Btu (Variable): 10,000/20,000 Btu/Hr
• Type Gas: Natural Only
• Ignition: Piezo
• Pressure Regulator Setting: 3" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 10.5", Minimum - 4"
GWN30TA
• Btu (Variable): 15,000/30,000 Btu/Hr
• Type Gas: Natural Only
• Ignition: Piezo
• Pressure Regulator Setting: 3" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 10.5", Minimum - 4"
WMP20A, GWP20TA
• Btu (Variable): 10,000/20,000 Btu/Hr
• Type Gas: Propane/LP Only
• Ignition: Piezo
• Pressure Regulator Setting: 8" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 14", Minimum - 11"
GWP30TA
• Btu (Variable): 15,000/30,000 Btu/Hr
• Type Gas: Propane/LP Only
• Ignition: Piezo
• Pressure Regulator Setting: 8" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 14", Minimum - 11"
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specied heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If
so, contact your local natural or propane/LP
gas supplier.
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),
call DESA Heating Products’ Technical Ser-
vice Department at 1-866-672-6040.
When calling DESA Heating Products, 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 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 27) or call DESA Heating Products at 1-
866-672-6040 for referral information.
When calling DESA Heating Products, have
ready
• model number of your heater
• the replacement part number
TECHNICAL SERVICE
You may have further questions about instal-
lation, operation or troubleshooting. If so,
contact DESA Heating Products’ Technical
Service Department at 1-866-672-6040.
When calling please have your model and
serial numbers of your heater ready.
You can also visit DESA Heating Products’ tech-
nical 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 Heat-
ing Products.