Desa SFG20PT, SF30PT Protects it from freezing rain or sleet, 30,000 Btu/Hr Models 1/2 or greater

Page 10

INSTALLATION

Continued

CAUTION: For propane/LP

gas, never connect heater di-

rectly to the propane/LP supply.

This heater requires an external

regulator (not supplied). Install

theexternalregulatorbetweenthe

heater and propane/LP supply.

 

For propane/LP gas, the installer must supply an

external regulator. The external regulator will

reduce incoming gas pressure. You must reduce

incoming gas pressure to between 11" and 14" of

water. If you do not reduce incoming gas pressure,

heater regulator damage could occur. Install the

external regulator with the vent pointing down

as shown in Figure 10. Pointing the vent down

protects it from freezing rain or sleet.

 

CAUTION: Use only new,

IMPORTANT: Install an equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.

Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Sealant in pipe could result in clogged heater valves. Most flex gas tubing does not require sealant. Read instructions supplied with flex gas tubing.

WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

Rear View

Hole

 

 

Provided

 

in Rear

 

Surround

black iron or steel pipe. Inter-

nally-tinned copper tubing may

be used in certain areas. Check

your local codes. Use pipe of

large enough diameter to allow

proper gas volume to heater. If

pipe is too small, undue loss of

Flex Gas

Line

3/8" Male Flare to NPT Connector

3/8" Male Flare to NPT Connector

Pipe Joint

Sealant

Required

(NPT End)

Pressure Regulator

volume will occur.

 

Typical Inlet Pipe Diameters

20,000 Btu/Hr Models - 3/8" or greater

Pipe Joint

Equipment

Sealant

Shutoff

Required

Valve*

30,000 Btu/Hr Models - 1/2" or greater

Installation must include equipment shutoff valve,

union and plugged 1/8" NPT tap. Locate NPT tap

within reach for test gauge hook up. NPT tap must

be upstream from heater (see Figure 11).

Propane/LP

 

External

Supply Tank

 

 

 

 

Regulator

(NPT End)

Tee Joint

Reducer Bushing to 1/8"

NPT

1/8" NPT

Plug Tap

Test Gauge Connection*

3/8" NPT Pipe Nipple

Natural Gas From Gas Meter (4" W.C. to 10.5" W.C. Pressure)

 

 

 

Propane/LP

 

 

 

From External

 

 

 

Regulator

 

3" Min

 

 

 

(11" W.C. to 14"

 

 

 

 

 

 

W.C. Pressure)

Vent

Pointing

Down

Figure 10 - External Regulator With Vent

Pointing Down

Cap Tee

Pipe

Joint

Nipple

Sediment Trap

Figure 11 - Gas Connection

*A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See Accessories, page 21.

10

www.desatech.com

116307-01B

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Contents What to do if YOU Smell GAS Residential Models Garage ModelsTable of Contents Safety Information Local Codes Product FeaturesUnpacking Providing Adequate Ventilation AIR for Combustion VentilationDetermining FRESH-AIR Flow for Heater Location 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 anchorPlacing Heater On Mounting Screws Connecting to GAS SupplyMarking Screw Locations Locate hardware packet behind left side door of heater30,000 Btu/Hr Models 1/2 or greater Protects it from freezing rain or sleetBe upstream from heater see Figure Test Pressures In Excess Of 1/2 Psig 3.5 kPa Checking GAS ConnectionsTest Pressures Equal To or Less Than 1/2 Psig 3.5 kPa Installing Refractory and Front Panel For Your Safety Read Before LightingOperating Heater Lighting Instructions Turn control knob clockwise to the OFF positionThermostat Control Operation Manual Lighting ProcedureInspecting Heater Pilot Flame PatternBurner Pilot AIR Inlet Cleaning MaintenanceODS/PILOT and Burner CabinetObserved Problem Possible Cause Remedy TroubleshootingContact local propane/LP gas company 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 WarningSF30NT SF30PT SpecificationsLSF30NT, VSF30NT LSF30PT, VSF30PT Replacement Parts AccessoriesParts Central Illustrated Parts Breakdown Parts List Warranty 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 abajoPruebas de presiones mayores a 1/2 PSI 3.5 kPa Revisión DE LAS Conexiones DE GASGas natural Instalación del panel anterior y el refractario Abra la válvula de cierre del equipo consulte la figuraInstale el panel anterior y el refractario Instale un difusor frontal como se muestra en la figuraInstrucciones 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 quemadorConsejos Para Servicio Servicio TécnicoCuando la presión del gas de entrada sea muy baja SF30NT EspecificacionesLSF30NT, VSF30NT Piezas DE Repuesto AccesoriosCentral DE Piezas Clasificación Ilustrada DE Piezas Lista DE Piezas Información DE Garantía Guarde Esta Garantía
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