TROUBLESHOOTING

Continued

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 POSSIBLE CAUSE

REMEDY

Heater produces unwanted 1.

Heater burning vapors from

odors

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.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)

Gas odor even when control 1.

Gas leak. See Warning

1.

Locate and correct all leaks

knob is in OFF position

statement at top of page

 

(see Checking Gas Connec-

2.

Control valve defective

 

tions, page 11)

2.

Replace control valve

Gas odor during combustion

1.

Foreign matter between con-

 

 

trol valve and burner

 

2.

Gas leak. See Warning

 

 

statement at top of page

1.Take apart gas tubing and remove foreign matter

2.Locate and correct all leaks (see Checking Gas Connec- tions, page 11)

Moisture/condensation noticed

1. Not enough combustion/ven-

1. Refer to Air for Combustion

on windows

tilation air

and Ventilation requirements

 

 

(page 5)

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 Productsʼtechni- 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.

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.

116307-01A

www.desatech.com

19

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Desa SF20NT Technical Service, Service Publications Service Hints, Gas leak. See Warning, When Gas Pressure Is Too Low
Page 18 Page 20

SF20NT specifications

Desa SF20NT is a versatile and innovative gas-fired space heater designed for efficient heating solutions in various environments, whether in residential, commercial, or industrial settings. This model is known for its high performance, energy efficiency, and advanced technology, making it a popular choice among users seeking reliability and effectiveness in their heating needs.

One of the primary features of the Desa SF20NT is its impressive heating capacity. With a heating output of around 20,000 BTUs, it can effectively warm spaces up to 1,000 square feet, making it suitable for larger areas. This capability is enhanced by the heater's superior metal construction, ensuring durability and long-lasting performance.

In terms of technology, the Desa SF20NT incorporates a direct vent system that utilizes outside air for combustion. This feature not only increases efficiency but also enhances safety, as it minimizes the risk of hazardous fumes entering the living space. The direct vent system allows for installation flexibility; the unit can be vented horizontally through a wall or vertically through a roof, catering to different building designs.

Another standout characteristic of the Desa SF20NT is its thermostat control, which allows users to maintain a consistent temperature easily. This feature contributes to energy savings by enabling the heater to operate only when necessary, thus reducing unnecessary heating costs. Additionally, the unit includes a programmable timer, allowing users to set specific heating schedules, further optimizing energy use.

Safety is also a critical aspect of the Desa SF20NT design. It comes with built-in safety features such as a flame sensor and a safety shut-off system, ensuring that the heater operates under safe conditions at all times. The unit is designed to meet stringent safety standards, giving users peace of mind.

In summary, the Desa SF20NT is a powerful, efficient, and safe space heater that is equipped with modern features and technologies. With its high heating capacity, direct vent system, thermostat control, and safety mechanisms, it stands out as an excellent choice for anyone looking for reliable heating solutions. Whether for home or business use, the Desa SF20NT is built to provide comfort and efficiency year-round.
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