Bard WG241 Installation Instructions Manual

Also see for WG241: Installation instructions

Bard WG241 Installation Instructions Manual Manual pdf 24 page image

Manual 2100-365Page 218. Refer to Table 6 for Gas Pipe Sizes for natural gas.If more than one appliance is supplied from a singleline size, capacity must equal or exceed thecombined input to all appliances, and the branchlines feeding the individual appliances properlysized for each input.4. An 1/8” NPT plugged tapping accessible for testgauge connection shall be installed immediatelyupstream of the gas supply connection to the furnacefor the purpose of determining the supply gaspressure. This can be omitted if local codes permituse of plugged tapping in gas valve inlet.5. Install listed manual shutoff valve in the supply gasline external to and immediately upstream of thefurnace. See Figure 12.6. Use steel or wrought iron pipe and fittings.7. DO NOT thread pipe too far. Valve distortion ormalfunction may result from excess pipe within thecontrol. Use pipe joint compound resistant to theaction of liquefied petroleum gases on male threadsonly. DO NOT use Teflon tape. See Table 5 andFigure 13.18. GAS SUPPLY AND PIPINGGENERAL RECOMMENDATIONS1. Be sure the gas line complies with the local codesand ordinances, or in their absence with the NationalFuel Gas Code, ANSI Z223.1, or Natural GasInstallation Code, CAN/CGA B149.1, or PropaneInstallation Code B149.2, latest edition.2. A sediment trap or drip leg must be installed in thesupply line to the furnace.3. A ground joint union shall be installed in the gas lineadjacent to and upstream from the gas valve anddownstream from the manual shutoff valve.TABLE 5LENGTH OF STANDARDPIPE THREADS (INCHES)eziSepiPhtgneLevitceffEdaerhTfohtgneLllarevOdaerhTfo8/3 2/1 61/94/3 61/9--2/1 61/311 61/9 1fohtgneLteeF-epiPeziSepiPtupnIruoHrepUTB-yticapaCepiP"2/1 "4/3 "1 "4/1-101 000,231 000,872 000,025 000,050,102 000,29 000,091 000,053 000,03703 000,37 000,251 000,582 000,09504 000,36 000,031 000,542 000,00505 000,65 000,511 000,512 000,04406 000,05 000,501 000,591 000,00407 000,64 000,69 000,081 000,07308 000,34 000,09 000,071 000,053001 000,83 000,97 000,051 000,503TABLE 6GAS PIPE SIZES - NATURAL GASCHECKING THE GAS PIPINGBefore turning gas under pressure into piping,all openings from which gas can escape should beclosed. Immediately after turning on gas, the systemshould be checked for leaks. This can be done bywatching the 1/2 cubic foot test dial and allowing 4minutes to show any movement, and by soaping eachpipe connection and watching for bubbles. If a leak isfound, make the necessary repairs immediately andrepeat the above test. The furnace must be isolatedfrom the gas supply piping system by closing themanual shutoff valve on the combination gas controlvalve during pressure testing of the gas supply pipingsystem at pressures up to 1/2 PSIG. The furnace and itsindividual shutoff valve must be disconnected fromsupply piping and supply piping capped during anypressure testing of supply piping system at testpressures in excess of 1/2 PSIG.Defective pipes or fittings should be replaced and notrepaired. Never use a flame or fire in any form tolocate gas leaks; use a soap solution.After the piping and meter have been checkedcompletely, purge the system of air. DO NOT bleed airinside the furnace. Be sure to check and relight all thegas pilots on other appliances that may have beenextinguished because of interrupted gas supply.MIS-897FIGURE 13PROPER PIPING PRACTICE