Desa VSL18NT, VSL18PT installation manual Checking GAS Connections

Page 12

INSTALLATION

Continued

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 inches

of water. If you do not reduce incoming gas pres-

sure, heater regulator damage could occur. Install

the external regulator with the vent pointing down

as shown in Figure 15. Pointing the vent down

protects it from freezing rain or sleet.

CAUTION: Use only new,

black iron or steel pipe. Inter-

nally-tinned copper tubing may

be used in certain areas. Check

Install sediment trap in supply line as shown in Figure 16. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly.

IMPORTANT: Hold the pressure regulator with wrench when connecting it to gas piping and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged.

Pressure

Heater

Regulator

 

Cabinet

your local codes. Use pipe of

large enough diameter to allow

proper gas volume to heater. If

pipe is too small, undue loss of

volume will occur.

Typical Inlet Pipe Diameter - 3/8" (9.5 mm) 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 16).

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. Excess sealant in pipe could result

Test Gauge Connection*

3/8" NPT Pipe Nipple

Tee Joint

Reducer Bushing to 1/8" NPT

1/8" NPT

Plug Tap

Trap

Tee

Joint

Pipe

Sediment

Nipple

 

 

Cap

 

Equipment

Shutoff

Valve *

3"

(7.6 cm)

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

Propane/LP From External Regulator (11" W.C. to 14" W.C. Pressure)

in clogged heater valves.

 

WARNING: Use pipe joint

sealant that is resistant to liquid

petroleum (LP) gas.

 

Propane/LP

External

Supply Tank

 

Regulator

 

Vent

 

Pointing

 

Down

Figure 15 - External Regulator With Vent

Pointing Down

 

Figure 16 - 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 23.

CHECKING GAS CONNECTIONS

WARNING: Test all gas piping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once.

12

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116292-01D

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Contents What to do if YOU Smell GAS Table of Contents Safety Information Product Features Local CodesProduct Identification UnpackingAIR for Combustion Ventilation Providing Adequate VentilationFollowing are excerpts from National Fuel Unusually Tight ConstructionDetermining FRESH-AIR Flow for Heater Location Determining if You Have a Confined or Unconfined SpaceInstallation Ventilation AIRCheck GAS Type Ventilation Air From Inside BuildingInstallation Items Installing IgnitorInstalling Glass Panel Removing Front Panel of HeaterLocating Heater This heater is designed to be mounted on a wallInstalling Heater to Wall Connecting to GAS Supply Installing Bottom Mounting ScrewsPlacing Heater On Mounting Bracket Checking GAS Connections Test Pressures In Excess Of 1/2 Psig 3.5 kPa Test Pressures Equal To or Less Than 1/2 Psig 3.5 kPaConnecting to Electrical Supply For Your Safety Read Before LightingOperating Heater Extension CordLighting Instructions To Turn OFF GAS To ApplianceThermostat Control Operation Shutting Off HeaterManual Lighting Procedure Inspecting HeaterBurner Flame Pattern Pilot Flame PatternCleaning Maintenance ODS/PILOT and BurnerBurner Pilot AIR Inlet CabinetTroubleshooting Observed Problem Possible Cause RemedyGoes out when control knob is Control knob not pressed Delayed ignition of burner Manifold pressure is too lowBurner orifice is clogged Clean burner see Cleaning ODS/pilot lights but flameWalls or furniture Cleaners, etc. may turn into No power to electric outlet 60Hz outletSlight smoke or odor during Air passageways on heaterMent above Specifications Wiring DiagramsFor purposes of input adjustment LSL18NT, SL18NT and VSL18NT LSL18PT, SL18PT and VSL18PTAccessories Technical ServiceReplacement Parts Service Publications Service HintsIllustrated Parts Breakdown Models LSL18NT, LSL18PT, SL18NT, SL18PT, VSL18NT and VSL18PTParts List Parts Centrals 116292-01D Warranty Information Keep this WarrantyQUÉ Hacer SI Percibe Olor a GAS Tabla DE Contenido Información DE Seguridad Información DE Códigos LocalesDesempaque Características DEL ProductoAire Para Combustión Ventilación Cómo Proveer LA Ventilación AdecuadaConstrucción inusualmente sellada Espacio confinado y no confinadoAire Para Ventilación Aire del interior de la construcción para ventilaciónInstalación Verifique EL Tipo DE GASAire del exterior para ventilación Artículos DE Instalación Desmontaje DEL Panel Anterior DEL CalentadorInstalación DEL Encendedor Instalación del panel de vidrioCorrientes de aire fuertes Ubicación DEL CalentadorInstalación DEL Calentador EN LA Pared Soporte de montajeDoble el anclaje de pared como se muestra en la figura Conexión AL Suministro DE GAS Colocación del calentador en el soporte de montajeInstalación de los tornillos de montaje InferioresPermita el paso del volumen de gas Revisión DE LAS Conexiones DE GASLo suficientemente grande para que Adecuado al calentador. Si la tuberíaCierre del equipo Regule la presión del sistema de tubería deUsando aire comprimido Repare todas las fugas inmediatamenteFuncionamiento DEL Calentador Conexión a LA Alimentación EléctricaCable DE Extensión Para SU SEGURIDAD, LEA Esto Antes DE EncenderloFuncionamiento DEL Instrucciones DE EncendidoApague el piloto Funcionamiento DEL Patrón DE LA Llama DELCalentador Procedimiento DELimpieza Y Mantenimiento Piloto CON ODS Y QuemadorEntrada DE Aire AL Piloto DEL Quemador GabineteSolución DE Problemas Problema Observado Causa Posible RemedioLa posición del regulador de gas no es la correcta Reemplace el regulador de gasCausa Posible Remedio El problema desaparecerá Hay aire en la línea de gas Hasta que se elimine el aireLínea de gas Los conductos de aire en elCia anterior Diagramas DE Cableado EspecificacionesLSL18NT, SL18NT y VSL18NT LSL18PT, SL18PT y VSL18PTAccesorios Servicio TécnicoPublicaciones DE Servicio Piezas DE RepuestoClasificación Ilustrada DE Piezas Modelos LSL18NT, LSL18PT, SL18NT, SL18PT, VSL18NT Y VSL18PTLista DE Piezas Laporte’s Parts & Service 2444 N th Street Centrales DE PiezasNotas Información DE Garantía Guarde Esta Garantía
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