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119526-01A28
WIRING DIAGRAM
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TECHNICAL SERVICE
You may have further questions about installation,
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’ techni-
cal services web site at www.desatech.com.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• replace will not produce specied heat
• for propane/LP unit, propane/LP gas supply
may be low
You may feel your gas pressure is too low. If so,
contact your local 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 Service
Department at 1-866-672-6040. When calling
DESA Heating Products, have ready
• your name and address
• model and serial numbers of your replace
• how replace 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), call
DESA Heating Products at 1-866-672-6040 for
referral information. When calling DESA Heating
Products, have ready
• model number of your replace
• the replacement part number
SPECIFICATIONS
LMFP33NR(B)
• Rating (Variable): 23/33,000Btu/Hr
• Gas Type: Natural Gas Only
• Ignition: Piezo
• Pressure Regulator Setting: 3.5" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 10.5", Minimum* - 5.5"
• Shipping Weight - 122 lbs.
* For purposes of input adjustment
LMFP33PR(B)
• Rating (Variable): 23/33,000Btu/Hr
• Gas Type: Propane/LP Gas Only
• Ignition: Piezo
• Pressure Regulator Setting: 7.9" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 14", Minimum* - 11"
• Shipping Weight - 122 lbs.
* For purposes of input adjustment