PB Heat DE manual GAS Piping, Gas Connection to Boiler

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GAS PIPING

5.GAS PIPING

1.Size and install the gas supply piping properly in order to provide a supply of gas sufficient to meet the maximum demand without undue loss of pressure between the meter and the boiler.

2.Determine the volume of gas to be provided to the boiler in cubic feet per hour. To obtain this value, divide the Btu per hour rating (on the boiler rating plate) by the heating value of the gas in Btu per cubic feet. Obtain the heating value of the gas from the gas supplier. As an alternative, use Table 5.1 or

5.2on the next page to obtain the volume of gas to be provided to the boiler.

3.Use the value obtained above as the basis for piping sizing. Size the gas piping in accordance with Table

5.3.Consult the National Fuel Gas Code ANSI Z223.1/NFPA 54 and or CAN/CSA B149.1, Natural Gas and Propane Installation Code for proper sizing options.

4.Locate the drop pipe adjacent to, but not in front of the boiler.

5.Install a sediment trap. See Figure 5.1. Locate a tee in the drop pipe at same elevation as the gas inlet connection to the boiler. Extend the drop pipe to a pipe cap.

6.Install a ground joint union ahead of the gas control assembly to permit servicing of the control. Some local codes require an additional service valve when using the combination gas controls. If your code requires such a valve, a suggested location is shown in Figure 5.1.

WARNING

Use a pipe joint sealing compound that is resistant to the action of liquefied petroleum gas. A non-resistant compound may lose sealing ability in the presence of this gas, resulting in a gas leak and fire or explosion potential.

7.Check piping for leaks.

Use an approved gas detector, a non-corrosive leak detection fluid or other leak detection method. If leaks are found, turn off all gas flow and repair as necessary.

WARNING

When checking for leaks, do not use matches, candles, open flames or other methods that provide a source of ignition. This can ignite a gas leak, resulting in fire or explosion.

Figure 5.1: Gas Connection to Boiler

8.Disconnect the boiler and its individual shut-off valve from the gas supply piping system during any pressure testing of that system at test pressure in excess of 1/2 psig (3.5 kPa).

CAUTION

Do not subject the gas valve to more than 1/2 psi (3.5 kPa) pressure. Doing so may damage the valve.

Isolate the boiler from the gas supply piping system by closing its individual service valve during any pressure testing of the gas supply piping system at test pressure equal to or less than 1/2 psig (3.5 kPa).

9.Minimum permissible supply pressure for purposes of input adjustment:

Natural Gas

5.0″ W.C. (1.2 kPa)

LP Gas

11.0″ W.C. (2.7 kPa)

Maximum permissible supply pressure to the boiler

(Inches Water Column):

13.5″ W.C. (3.4 kPa)

Natural Gas

LP Gas

13.5″ W.C. (3.4 kPa)

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Contents Series DE Table of Contents Using this Manual Installation SequenceSpecial Attention Boxes Clearance from Combustible Construction PreinstallationAccessibility Clearances AIR for Combustion and VentilationWhere Ifan = Input of the fan assisted appliances in Btu/hr Required Volume other =Air Openings All Air from Outdoors through Vertical Ducts Mechanical Combustion Air SupplyInstallation Survey Planning the LayoutCombustion Air Ducts Boiler SET-UP Water Piping and Controls Boiler Supply and ReturnSafety Relief Valve Parallel Hook-up with Water ChillerPiping for Zoned Systems Zone Piping with Zone ValvesFreeze Protection Expansion TankINDIRECT-FIRED Water Heater For new or existing systems that must be freeze- protectedChimney Venting VentingGeneral Direct Exhaust Horizontal VentingEquivalent Vent Length Direct Exhaust, Sidewall Venting with Vertical Off-Set Direct Exhaust Vertical Venting Direct Exhaust Sidewall VentingBoiler Removal from Common Venting System Seal any unused openings in the common venting systemGAS Piping Gas Connection to BoilerNatural Gas Wiring Controls Zoned System WiringElectrical Wiring and Connection Diagram Sequence of OperationIgnition System Operating Sequence Zone Wiring with Zone Valves START-UP Procedures Completing the InstallationValve Tapping and Adjustment Screw Locations For Your Safety Read Before Lighting Checking Burner Input Adjustment of GAS Pressure RegulatorControl Descriptions See .1 in Electrical for locations of these devicesCHECK-OUT Procedure START-UP Procedures Troubleshooting Troubleshooting GuidesMeasuring Suction Pressure Procedure For Measuring Fan Suction Pressure Boiler Troubleshooting Guide Burners Functioning See FigureBoiler Troubleshooting Guide Burners Not Functioning Maintenance Daily with Boiler in USE Weekly with Boiler in USEMonthly with Boiler in USE Annually Before Start of Heating Season Intermittent Pilot and Main Burner FlameBoiler Dimensions & Ratings Series DE Boiler RatingsRepair Parts Repair Parts Series DE GAS BoilerBase/Burners/Manifold Repair Parts Page Page Series DE

DE specifications

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