Bard WG3S2-A Installation Instructions Manual

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Bard WG3S2-A Installation Instructions Manual Manual pdf 35 page image

Manual 2100-587BPage 35 of 5927. SERVICE AGENCY PROCEDURESMAIN BURNERObserve the main burners in operation. The flameshould be mostly “blue” with possibly a little orange(not yellow) at the tips of the flame. The flames shouldbe in the center of the heat exchanger tubes and notimpinging on the heat exchanger surfaces themselves.Observe the fire until the blower starts (there is anormal delay period until the heat exchanger warmsup). There should be no change in the size or shape ofthe flame. If there is any wavering or blowing of theflame on blower start-up, it is an indication of apossible leak in the heat exchanger.28. MAINTAINING UNIT IN GOODWORKING ORDERThe unit should be inspected annually by a qualifiedservice agency.BURNERS / HEAT EXCHANGER / FLUE GASPASSAGE WAYSThe burners, heat exchanger and interior flue gaspassages may be inspected using a light on small mirroror an extension handle. Remove the screws securingthe inducer and collector box. Now inspect the uppertubes of the heat exchanger.Check the exterior of the heat exchanger and theinterior flue gas passages for any evidence ofdeterioration due to corrosion, cracking or other causes.If signs of sooting exist, remove the burners and cleanthe heat exchanger, as required.MIS-165FIGURE 15TOP VIEW OF GAS CONTROLCAUTIONLabel all wires prior to disconnection whenservicing controls. Wiring errors can causeimproper and dangerous operation. Verifyproper operation after servicing.WARNINGFollow these procedures before inspectingfurnace.• Turn room thermostat to its lowest or offsetting.• Turn off manual gas shut off valve.• Wait at least 5 minutes for furnace to coolif it was recently operating.• Turn off furnace electrical power; failureto do so could result in injury or death.WARNINGUse replacement parts listed in theReplacement Parts list only. The use ofincorrect parts could cause improper unitoperation, resulting in damage, injury ordeath.