Desa FAS-3B, FAS-5B installation manual Infrared VENT-FREE Natural GAS Heater

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INFRARED VENT-FREE NATURAL GAS HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

FA-3B

FAS-3B

FA-5B

FAS-5B

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal in- jury, or loss of life.

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

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. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

Installation and service must be performed by a qualified installer, service agency, or the gas supplier.

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WARNING: Improper in- stallation, adjustment, al- teration, service, or mainte- nance can cause injury or property damage. Refer to this manual for correct in- stallation and operational procedures. For assis- tance or additional infor- mation 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 in- stalled. Provisions for ad- equate combustion and ventilation air must be pro- vided. Refer to Air For Combustion and Ventila- tion section on page 4 of this manual.

This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited by state or local codes.

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

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Contents What to do if YOU Smell GAS Infrared VENT-FREE Natural GAS HeaterInfrared Natural GAS Heater Safety InformationProduct Identification Product FeaturesLocal Codes UnpackingProducing Adequate Ventilation Fresh AIR for Combustion and VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining FRESH-AIR Flow for Heater Location Fresh AIR for Combustion VentilationDetermining if You Have a Confined or Unconfined Space Ventilation Air From Inside Building Ventilation AIRVentilation Air From Outdoors Installation Items InstallationLocating Heater Check GAS TypeMounting Bracket Installing Heater to WallRemoving Front Panel Of Heater Models FA-3B and FA-5B Methods For Attaching Mounting Bracket To WallAttaching Mounting Bracket To Wall Installing Bottom Mounting ScrewsPlacing Heater On Mounting Bracket Typical Inlet Pipe Diameters Connecting to GAS SupplyPressure Testing Gas Supply Piping System For Your Safety Read Before LightingPressure Testing Heater Gas Connections Operating HeaterLighting Instructions Manual Lighting ProcedureTo Select Heating Level To Turn OFF GAS to ApplianceThermostat Models FAS-3B and FAS-5B Inspecting Burner Cleaning and MaintenanceObserved Problem Possible Cause Remedy TroubleshootingInfrared Natural GAS Heater Top Service Hints SpecificationsService Publications Technical Replacement PartsParts Centrals AccessoriesManual Shutoff Valve GA5010 FAN Kits UH1000FB and UHS1000FBIllustrated Parts Breakdown Burner Assembly ODS/Pilot AssemblyFA-3B KEY FA-3B Description Parts ListFA-5B KEY FA-5B Description FAS-3B ODS/Pilot Assembly Burner AssemblyKEY FAS-3B Description QTY FAS-5B KEY FAS-5B Description QTY International Warranty Information