Technical Service; Service Publications; Service Hints - Desa SF20NTX Manual De Instalación

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. Fol-
low the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies,
paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes.
These fumes may mix with combustion air and create odors.
OBSERVED PROBLEM
Heater produces unwanted
odors
Gas odor even when control
knob is in OFF position
Gas odor during combustion
Moisture/condensation noticed
on windows

TECHNICAL SERVICE

You may have further questions about installation,
operation or troubleshooting. If so, contact DESA
Heating Productsʼ 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 Productsʼ techni-
cal 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 Heating Products.
117933-01A
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Heater burning vapors from
paint, hair spray, glues, etc.
See IMPORTANT statement
above
2. Low fuel supply (propane/LP
gas)
3. Gas leak. See Warning
statement at top of page
1. Gas leak. See Warning
statement at top of page
2. Control valve defective
1. Foreign matter between con-
trol valve and burner
2. Gas leak. See Warning
statement at top of page
1. Not enough combustion/ven-
tilation air
www.desatech.com
REMEDY
1. Ventilate room. Stop using
odor causing products while
heater is running
2. Refill supply tank
3. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 11)
1. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 11)
2. Replace control valve
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 11)
1. Refer to Air for Combustion
and Ventilation requirements
(page 5)

SERVICE HINTS

When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If so, con-
tact your local natural or propane/LP gas supplier.
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