Williams 1403611, 3003612, 2203611 Gas Supply & Piping, GAS Supp, Orifice Sizes, GAS Piping, 10n

Page 10

Gas Supply & Piping

Gas control valve, within the furnace, is shipped with a seal over gas inlet tapping. Do not remove this seal until ready to connect piping.

WARNING

DANGER OF PROPERTY DAMAGE,

BODILY INJURY OR DEATH.

MAKE SURE THE FURNACE IS EQUIPPED TO OPERATE ON THE TYPE OF GAS AVAILABLE. MODELS DESIGNATED AS NATURAL GAS ARE TO BE USED WITH NATURAL GAS ONLY. FURNACE DESIGNATED FOR USE WITH LIQUEFIED

PETROLEUM (L.R) GAS HAVE ORIFICES SIZED FOR COMMERCIALLY PURE PROPANE GAS. THEY CANNOT BE USED WITH BUTANE OR A MIXTURE OF BUTANE AND PROPANE.

GAS SUPP_

For Natural Gas, the minimum inlet gas supply pressure for the purpose of input adjustment is 5" column. The max- imum inlet gas supply pressure is 7" water column.

For L.R Gas, the minimum inlet gas supply pressure for the purpose of input adjustment is 11" water column. The maximum inlet gas supply pressure is 13" water column.

Gas pressures and input to the burners must not exceed

the rated input and pressure shown on the rating plate. On Natural Gas the manifold pressure should be 4 inches water column. The manifold pressure should be 11 inches water column for L.R Gas. See page 13 for operation above 2000 feet altitude. Orifice change may be required to suit gas supplied. Check with your local gas supplier.

ORIFICE SIZES

Furnace Technical Information, page 13, shows the cor-

rect orifice sizes for the different input ratings when using Natural or L.R Gas.

GAS PIPING

The gas supply line must be of adequate size to handle the BTU/HR requirements and length of the run for the unit being installed.

Determine the minimum pipe size from Fig. 10, page 11,

basing the length of the run from the gas meter or source to the unit.

All piping must comply with local codes and ordinances or with the National Fuel Gas Code (ANSI Z223.1 NFPA No. 54), whichever applies.

IN Canada: Follow CAN/CGA-B149.1 (.2) Canadian Standard.

Refer to Fig. 8 for the general layout at the unit. It shows the basic fittings needed.

The following rules apply:

1.Use new, properly reamed pipe free from chips such as steel or black iron pipe and fittings or other approved by local codes.

2, Do not thread pipe too far. Valve distortion or malfunc- tion may result from excess pipe within control.

Apply moderate amount of good quality dope to pipe only, leaving 2 end threads bare. If L.R Gas installa-

tion, use compound resistant to action of liquefied petroleum gases.

3, Use ground joint unions.

4.Install a drip leg to trap dirt and moisture before it can enter the gas valve. Drip leg must be a minimum of 3 inches long.

5.Install a manual shut-off valve.

 

 

 

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--10n

Image 10
Contents For USE with Liquefied Petroleum L.P GAS only Model NOSFor USE with Natural GAS only Model Number InformationContents Your WarrantyKIT Number Wall Thickness Optional AccessoriesIntroduction Basic Description 9304 Inches to 15 inches 9303 Inches to 24 inchesSafety Rules Unpack Your Furnace Installing Your Wall FurnaceHelpful Installation Information Basic MaterialsInterior Clearances Refer to Fig Locating Wall FurnaceModels 1403612, 1403622, 1403611 Find the Studs InstallationCUT Vent Opening GAS and Electrical Supply Openings Install Spacer PlateInstall the mounting spacer plate a Furnace MountingOperating Instructions Optional Blower InstallationInstall Vent CAP RightOrifice Sizes Gas Supply & PipingGAS Supp GAS PipingChecking the GAS Piping Thermostat InstallationGAS Connection Bodily Injury or DeathMounting the Thermostat Thermostat Connection at Gas ValveLuams JumperCabinet Installation Furnace Technical InformationType of GAS Manifold PRESSURE, IN. W.C Start-Up ProcedureAdjust Pilot Burner NaturalOperating Your Furnace Williams GAS Control Valve P322053 & P322054 Couple BurnerWilliams GAS Control Valve P295300A & P295301A Thermo Pilot Couple BurnerImportant Keep Burner and Control Compartment Clean Williams GAS Control Valve P121200 & P171600Williams GAS Control Valve P295200A & P295201A Maintenance How To Care For Your FurnaceBurner Flame Tubes not properly installed Furnace may be overrated Troubleshooting Gravity Direct Vent Wall FurnaceSymptom Possible Cause Not stay lit afterSymptom Troubleshooting ...Possible Cause Optional Blower Accessory USE only Manufactures Authorized PartsWilliams Direct Vent Gas-Fired Wall Furnace For Parts lISTING see USE only Manufacturers Authorized PartsModelnumber MFG.DATECODE ServiceFor Your Safety Williams Furnace Company Manufactured

3003612, 3003611, 2203612, 1403612, 2203611 specifications

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