Bard WG3S2-A Installation Instructions Manual

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Bard WG3S2-A Installation Instructions Manual Manual pdf 46 page image

Manual 2100-587BPage 46 of 5935. LOW-NOX BURNER ASSEMBLY “N”SUFFIX MODELS ONLY – U.S.INSTALLATIONS ONLYNATURAL GAS MODELS ONLYModel numbers designated with an “N” are designedfor low NOx emissions which comply with allCalifornia Air Quality Management District regulationsfor nitrogen oxide emission levels. Refer to Figurebelow for NOx insert information.* * IMPORTANT * *For propane (LP) conversions the NOxreduction screen inserts shown below mustbe removed. This is accomplished byremoving the burner box assembly andremoving the NOx screens. Reassemble unitproperly before firing. Failure to remove theNOx screens can result in improper operationand malfunction of the burner system.FIGURE 22LOW NOX INSERTR-410A34. REFRIGERANT CHARGEThis unit was charged at the factory with the quantity ofrefrigerant listed on the serial plate. AHRI capacity andefficiency ratings were determined by testing with thisrefrigerant charge quantity.The pressure tables (page 45) show nominal pressuresfor the units. Since many installation specific situationscan affect the pressure readings, this information shouldonly be used by certified technicians as a guide forevaluating proper system performance. They shall notbe used to adjust charge. If charge is in doubt, reclaim,evacuate and recharge the unit to the serial plate charge.