Desa SF20NT installation manual Table of Contents

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WARNING: Improper installation, adjustment, altera- tion, service or maintenance can cause injury or prop- erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi- tional information consult a qualified installer, service agency or the gas supplier.

WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provi- sions for adequate combustion and ventilation air must be provided. Refer to Air for Combustion and Ventilation section on page 5 of this manual.

This appliance may be installed in an aftermarket,* per- manently located, manufactured (mobile) home, where not prohibited by local codes.

This appliance is only for use with the type of gas indi- cated on the rating plate. This appliance is not convert- ible for use with other gases.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts.

Sellers of unvented propane or natural gas-fired supplemental room heaters shall provide to each purchaser a copy of 527 CMR 30 upon sale of the unit.

Vent-free gas products are prohibited for bedroom and bathroom installation in the Common- wealth of Massachusetts.

TABLE OF CONTENTS

Safety Information

3

Troubleshooting

16

Local Codes

4

Technical Service

19

Product Identification

4

Service Publications

19

Unpacking

4

Service Hints

19

Product Features

4

Specifications

20

Air For Combustion and Ventilation

5

Accessories

21

Installation

7

Replacement Parts

21

Operating Heater

12

Parts Central

21

Inspecting Heater

14

Illustrated Parts Breakdown and Parts List

22

Cleaning and Maintenance

15

Warranty Information

24

2

www.desatech.com

116307-01A

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Contents What to do if YOU Smell GAS Residential Models Garage ModelsTable of Contents Safety Information Unpacking Product FeaturesLocal Codes Determining FRESH-AIR Flow for Heater Location AIR for Combustion VentilationProviding Adequate Ventilation Ventilation AIR Ventilation Air From Inside BuildingCheck GAS Type InstallationInstallation Items Ventilation Air From OutdoorsColdest part of room Installing Heater to WallLocating Heater Attaching to wall stud Attaching to wall anchorLocate hardware packet behind left side door of heater Marking Screw LocationsMark two screw locations on wall as shown in Figure Attaching To Wall Anchor MethodConnecting to GAS Supply External Regulator With Vent Pointing DownTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Checking GAS ConnectionsTest Pressures In Excess Of 1/2 Psig 3.5 kPa Operating Heater For Your Safety Read Before LightingInstalling Refractory and Front Panel Make sure control knob of heater is in the OFF positionLighting Instructions What to do if YOU Smell GASInspecting Heater Burner Pilot AIR Inlet Cleaning MaintenanceODS/PILOT and Burner CabinetContact local propane/LP gas company TroubleshootingObserved Problem Possible Cause Remedy Assembly Goes out when control knob is Control knob not pressedProblem could be caused by Delayed ignition of burners Manifold pressure is too lowWhen heated, vapors from Turn heater off when using Noise when burner is litDirty or partially clogged Clean burner see Cleaning Turn off air supplyWhen Gas Pressure Is Too Low Technical ServiceService Publications Service Hints Gas leak. See WarningLSF30NT, VSF30NT LSF30PT, VSF30PT SpecificationsSF30NT SF30PT Parts Central AccessoriesReplacement Parts Illustrated Parts Breakdown Parts List LSF20PTWarranty Information Keep this WarrantyQUÉ Hacer SI Percibe Olor a GAS Modelos Modelos Para CocheraTabla DE Contenido Información DE Seguridad Desempaque Códigos LocalesIdentificación DEL Producto Características DEL ProductoConstrucción inusualmente sellada Aire Para Combustión VentilaciónCómo Procurar LA Ventilación Adecuada Espacio confinado y no confinadoAire Para Ventilación Aire del interior de la construcción para ventilaciónArtículos DE Instalación InstalaciónVerifique EL Tipo DE GAS Aire del exterior para ventilaciónEn áreas con mucho viento o Ubicación DEL CalentadorColocación del calentador en los tornillos de montaje Instalación DEL Calentador EN LA ParedDoble en anclaje de pared como se muestra en la figura Coloque el calentador en los tornillos de montajeConexión AL Suministro DE GAS Ventila apuntando hacia abajoPropano o gas LP Revisión DE LAS Conexiones DE GASGas natural Repare todas las fugas inmediatamenteInstalación del panel anterior y el refractario Abra la válvula de cierre del equipo consulte la figuraInstale el panel anterior y el refractario Instrucciones DE Encendido No intente encender ningún aparatoFuncionamiento DEL Inspección DEL CalentadorEntrada DE Aire AL Piloto DEL Quemador Inspección DELLimpieza Y Mantenimiento Como se muestra en la figuraSolución DE Problemas Causa Posible RemedioEl termopar está dañado Problema Observado Causa Posible RemedioBaja presión del gas Presione totalmente la perilla de controlSe enciende o se apaga El problema desapareceráCierre el suministro de aire Silbante cuando el quemadorCuando la presión del gas de entrada sea muy baja Servicio TécnicoConsejos Para Servicio LSF30NT, VSF30NT EspecificacionesSF30NT Central DE Piezas AccesoriosPiezas DE Repuesto Clasificación Ilustrada DE Piezas Lista DE Piezas Información DE Garantía Guarde Esta Garantía

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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