Desa VN600BA Owner's Operation And Installation Manual

Also see for Vanguard VN600BA: Safety information and installation manual OWNER'S OPERATION AND INSTALLATION MANUAL OWNER'S OPERATION AND INSTALLATION MANUAL OWNER'S OPERATION AND INSTALLATION MANUAL OWNER'S OPERATION AND INSTALLATION MANUAL

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Desa VN600BA Owner's Operation And Installation Manual Manual pdf 5 page image

110720-01E55For more information, visit www.desatech.comFor more information, visit www.desatech.comWARNING: If the area in which the heater may beoperated is smaller than that defined as an uncon-fined space or if the building is of unusually tightconstruction, provide adequate combustion and ven-tilation air by one of the methods described in theNational Fuel Gas Code, ANSI Z223.1/NFPA 54, Sec-tion 5.3 or applicable local codes.AIR FOR COMBUSTION ANDVENTILATIONContinued40,00010,00050,0003. Add the Btu/Hr of all fuel burning appliances in the space.Vent-free heater _____________ Btu/HrGas water heater* _____________ Btu/HrGas furnace _____________ Btu/HrVented gas heater _____________ Btu/HrGas fireplace logs _____________ Btu/HrOther gas appliances* + _____________ Btu/HrTotal = _____________ Btu/Hr* Do not include direct-vent gas appliances. Direct-vent draws com-bustion air from the outdoors and vents to the outdoors.Example:Gas water heater _____________ Btu/HrVent-free heater + _____________ Btu/HrTotal = _____________ Btu/Hr4. Compare the maximum Btu/Hr the space can support with the actualamount of Btu/Hr used.__________________ Btu/Hr (maximum the space can support)__________________ Btu/Hr (actual amount of Btu/Hr used)Example: 51,200 Btu/Hr (maximum the space can support)50,000 Btu/Hr (actual amount of Btu/Hr used)The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You mustprovide additional fresh air. Your options are as follows:A. Rework worksheet, adding the space of an adjoining room. If the ex-tra space provides an unconfined space, remove door to adjoiningroom or add ventilation grills between rooms. See Ventilation Air FromInside Building.B. Vent room directly to the outdoors. See Ventilation Air FromOutdoors.C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room un-confined.If the actual Btu/Hr used is less than the maximum Btu/Hr the space cansupport, the space is an unconfined space. You will need no additional freshair ventilation.AIR FOR COMBUSTION AND VENTILATIONDetermining Fresh-Air Flow For Heater Location (Cont.)Ventilation AirVENTILATION AIRVentilation Air From Inside BuildingThis fresh air would come from an adjoining unconfined space.When ventilating to an adjoining unconfined space, you mustprovide two permanent openings: one within 12" of the ceiling andone within 12" of the floor on the wall connecting the two spaces(see options 1 and 2, Figure 2). You can also remove door intoadjoining room (see option 3, Figure 2). Follow the National FuelGas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustionand Ventilation for required size of ventilation grills or ducts.OrRemoveDoor intoAdjoiningRoom,Option 3Ventilation GrillsInto Adjoining Room,Option 212"12"VentilationGrillsinto AdjoiningRoom,Option 1Figure 2 - Ventilation Air from Inside BuildingFigure 3 - Ventilation Air from OutdoorsOutletAirVentilatedAtticOutletAirInletAirInlet Air VentilatedCrawl SpaceToCrawlSpaceTo AtticVentilation Air From OutdoorsProvide extra fresh air by using ventilation grills or ducts. You mustprovide two permanent openings: one within 12" of the ceiling andone within 12" of the floor. Connect these items directly to theoutdoors or spaces open to the outdoors. These spaces include atticsand crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation forrequired size of ventilation grills or ducts.IMPORTANT: Do not provide openings for inlet or outlet air intoattic if attic has a thermostat-controlled power vent. Heated airentering the attic will activate the power vent.