Bard WG3S1-A WG3S1-B WG3S1-CWG4S1-A Installation Instructions Manual

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Bard WG3S1-A WG3S1-B WG3S1-CWG4S1-A Installation Instructions Manual Manual pdf 26 page image

Manual 2100-483EPage 26 of 5918. 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 shut off valve.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 shut off valve in the supply gasline external to and immediately upstream of thefurnace. See Figure 11.6. 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 12.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, allopenings from which gas can escape should be closed.Immediately after turning on gas, the system should bechecked for leaks. This can be done by watching the 1/2cubic foot test dial and allowing 4 minutes to show anymovement, and by soaping each pipe connection andwatching for bubbles. If a leak is found, make thenecessary repairs immediately and repeat the above test.The furnace must be isolated from the gas supply pipingsystem by closing the manual shut off valve on thecombination gas control valve during pressure testing ofthe gas supply piping system at pressures up to 1/2PSIG. The furnace and its individual shut off valve mustbe disconnected from supply piping and supply pipingcapped during any pressure testing of supply pipingsystem at test pressures in excess of 1/2 PSIG.Defective pipes or fittings should be replaced and notrepaired. Never use a flame or fire in any form to locategas 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.FIGURE 12PROPER PIPING PRACTICE8. 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 properly sizedfor each input.MIS-897THIS PRODUCT MUST BE GAS PIPED BYA LICENSED PLUMBER OR GAS FITTERIN THE COMMONWEALTH OFMASSACHUSETTS.