Desa TB105 Service Procedures, Cleaning fan, Clean fan every 500 hours of operation or as needed

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Service Procedures

WARNING: Never service heater while it is plugged in, connected to propane supply, operating or hot. Severe burns and electrical shock can occur.

Cleaning fan

Clean fan every 500 hours of operation or as needed.

1.Remove screws on top cover using 5/16" nut-driver or Phillips head screw driver.

2.Remove top cover.

3.Detach the 2 black motor wires from ter- minal block under top cover. Be sure to detach only wires coming from motor.

4.Remove fan guard from rear of heater. Fan guard will snap out of shell.

5.Reach into rear of heater shell. Carefully pull motor wires through hole in bracket. Note: Pull wires through hole one at a time.

6.Remove screws holding motor mount to shell. Use 5/16" nut driver or Phillips head screw driver.

7.Carefully pull motor and fan out of shell. IMPORTANT: Be careful not to damage fan. Do not set motor and fan down with the weight resting on fan. This could dam- age fan pitch.

8.Turn motor and fan around. Place motor and fan into shell backwards. Note: Motor will go into shell first (see Figure 8).

9.Line up rear mounting holes in shell with first hole on each side of motor mount (see

Figure 8). Note: When holes are lined up, fan should be outside of shell.

10.Holding mounting screws, carefully reach through fan blades into rear of heater. Be careful not to damage fan pitch. Insert screw through motor mount and shell.

With free hand, attach screw finger tight.

Repeat process for other mounting hole.

11.Use 1/8" hex wrench to loosen setscrew which holds fan to motor shaft (see Fig- ure 9, page 9).

12.Slip fan off motor shaft.

13.Clean fan using soft cloth moistened with a cleaning solvent.

Top Cover

Terminal

Block

Hole in

Bracket

Motor

Motor Mounting

Bracket

Figure 7 - Removing Fan and Motor

Fan	Motor Mounting
	Motor Mounting
	Bracket

Figure 8 - Fan and Motor Reversed for

Cleaning

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Contents PROPANE/LP Construction Forced AIR Heater Table of Contents Safety InformationProduct Identification Theory of Operation AssemblyUnpacking Provide propane/LP supply system see Propane Supply InstallationVentilation Operation To Stop Heater55, 85, 125 Models Only Models OnlyTo Restart Heater MaintenanceStorage Service Procedures Cleaning fanClean fan every 500 hours of operation or as needed Remove top coverSpecifications 55,000 Btu/Hr Models85,000 Btu/Hr Models 125,000 Btu/Hr ModelsWiring Diagrams 55,000, 85,000 and 125,000 Btu/Hr ModelsReplacement Parts Technical ServiceService Publications Accessories Parts Under WarrantyIllustrated Parts Breakdown 55,000 BTU/HR ModelS TB100, TB104, TB106 and TB110Parts List 55,000 BTU/HR ModelS3839 Detail a Models Detail B 85,000 and 125,000 BTU/HR ModelS Description170,000 BTU/HR ModelS TB103, TB108 and TB113 170,000 BTU/HR ModelS No. Part No Description QtyWarranty and Repair Service Model Serial No Date of PurchaseGuarde este manual para futuras referencias Tabla de contenido Información de seguridadPerilla del parte anterior Información deIdentificación del Producto Desempaque EnsambleTeoría de funcionamiento ManijaSuministro de Instalación Propano VentilaciónFuncionamiento En modelos 55, 85, 125 solamenteEn modelo 170 solamente Ajuste el termostato a la posición deseadaAlmacenamiento MantenimientoPara apagar el calentador Para volver a encender el calentadorVentilador Soporte de montaje del motor Procedimientos de ServicioRetire la cubierta superior Especificaciones Modelos de 55,000 BTU/hModelos de 85,000 BTU/h Modelos de 125,000 BTU/hDiagramas de cableado Modelos de 55,000, 85,000 y 125,000 BTU/hPiezas de repuesto Servicio técnicoPublicaciones de Servicio AccesoriosClasificación ilustrada de piezas Modelos de 55,000 BTU/h, TB100, TB104, TB106 y TB110Lista de piezas Modelos de 55,000 BTU/h3839 DetalleDetail a Modelos Models Detalleetail BB Modelos de 85,000 y 125,000 BTU/h Modelos de 170,000 BTU/h, TB103, TB108 y TB113 Modelos de 170,000 BTU/h Garantía y servicio de reparación Modelo De serie Fecha de compraPage Table des matières Information relative La sécuritéÉlectrique trifilaire avec mise à la terre Conservez les bouteilles de propane à moins de 38 C 100 FIdentification du Produit Déballage AssemblagePoignée Pied en plastique et tubes rallongeCombustion Chauffage Théorie de FonctionnementAir pour la Air pour le Approvisionnement En propane Entre -7 C 20 F et 18 C -0 FDétendeur avec prise dair Dirigée vers le bas Pour allumer lappareil de chauffage Pour arrêter lappareil de chauffageModèles 55, 85 et 125 seulement Modèles 170 uniquementPour rallumer lappareil de chauffage EntreposageEntretien Ventilateur Support de montage du moteur Procédures dentretienÉcrou de 5/16 po ou un tournevis Phillips Caractéristiques Modèles à 55 000 BTU/hModèles à 85 000 BTU/h Modèles à 125 000 BTU/hDiagrammes de câblage Modèles à 55 000, 85 000 et 125 000 BTU/hService technique AccessoiresPièces de rechange Publications pour LentretienVue détaillée des pièces Modèles TB100, TB104, TB106, TB110 à 55 000 BTU/hRechange, à la page 13 de ce manuel Liste des piècesModèles à 55 000 BTU/h 3839 Detail a Models Detail B Modèles à 85 000 et 125 000 BTU/h Modèles TB103, TB108, TB113 à 170,000 BTU/h Modèles à 170 000 BTU/h Rechange, à la page 11 de ce manuelIndustrial Drive Akron Road Box Service de garantie et de réparationModèle Numéro de série Date dachat