Desa CGN20 Owner's Operation And Installation Manual

Contents

3103568OWNER’S MANUALPRODUCTIDENTIFICATIONFigure 1 - Vent-Free Natural Gas HeaterGrillGuardIgnitor Button Control KnobFrontPanelHeat Shield(RN30D) or GlassPanel (CGN20[L])AIR FOR COMBUSTIONAND VENTILATIONToday’s homes are built more energy effi-cient than ever. New materials, increasedinsulation, and new construction methodshelp reduce heat loss in homes. Home own-ers weather strip and caulk around windowsand doors to keep the cold air out and thewarm air in. During heating months, homeowners want their homes as airtight as pos-sible.While it is good to make your home energyefficient, your home needs to breathe. Freshair must enter your home. All fuel-burningappliances need fresh air for proper com-bustion and ventilation.PROVIDING ADEQUATEVENTILATIONThe following is excerpts from NationalFuel Gas Code. NFPA 54/ANSI Z223.1,Section 5.3, Air for Combustion and Venti-lation.All spaces in homes fall into one of the threefollowing ventilation classifications:1. Unusually Tight Construction; 2. Uncon-fined Space; 3. Confined Space.The information on pages 3 through 5 willhelp you classify your space and provideadequate ventilation.Confined and Unconfined SpaceThe National Fuel Gas Code (ANSIZ2123.1,1992 Section 5.3) defines a confined spaceas a space whose volume is less than 50cubic feet per 1,000 Btu per hour (4.8 m 3 perkw) of the aggregate input rating of allappliances installed in that space and anunconfining space as a space whose volumeis not less than 50 cubic feet per 1,000 Btuper hour (4.8 m3 per kw) of the aggregateinput rating of all appliances installed in thatspace. Rooms communicating directly withthe space in which the appliances are in-stalled*, through openings not furnishedwith doors, are considered a part of theunconfined space.* Adjoining rooms are communicating onlyif there are doorless passageways or ventila-tion grills between them.WARNING: This heater shallnot be installed in a confinedspace unless provisions are pro-vided for adequate combustionand ventilation air. Read the fol-lowing instructions to insureproper fresh air for this and otherfuel-burning appliances in yourhome.Exhaust fans, fireplaces, clothesdryers, and fuel burning appliancesdraw air from the house to operate.You must provide adequate fresh airfor these appliances. This will insureproper venting of vented fuel-burningappliances.Unusually Tight ConstructionThe air that leaks around doors and win-dows may provide enough fresh air forcombustion and ventilation. However, inbuildings of unusually tight construction,you must provide additional fresh air.Unusually tight construction is de-fined as construction where:a. walls and ceilings exposed to theoutside atmosphere have a con-tinuous water vapor retarder witha rating of one perm (6x10 -11kgper pa-sec-m2 ) or less with open-ings gasketed or sealedandb. weather stripping has beenadded on openable windows anddoorsandc. caulking or sealants are appliedto areas such as joints aroundwindow and door frames, be-tween sole plates and floors, be-tween wall-ceiling joints, be-tween wall panels, at penetra-tions for plumbing, electrical, andgas lines, and at other openings.If your home meets all of the threecriteria above, you must provide ad-ditional fresh air. SeeVentilation AirFrom Outdoors, page 5.If your home does not meet all ofthe three criteria above, proceed topage 4.HeaterCabinetContinued