Desa GWRN10 Safety Information And Installation Manual

Also see for GWN10: Safety information and installation manual Installation manual Installation manual Installation manual

Contents

Desa GWRN10 Safety Information And Installation Manual Manual pdf 4 page image

107902-01D4For more information, visit www.desatech.comFor more information, visit www.desatech.comAIR FOR COMBUSTION ANDVENTILATIONWARNING: This heater shall not be installed in aconfined space or unusually tight construction un-less provisions are provided for adequate combus-tion and ventilation air. Read the following instruc-tions to insure proper fresh air for this and other fuel-burning appliances in your home.Today’s homes are built more energy efficient than ever. New materi-als, increased insulation, and new construction methods help reduceheat loss in homes. Home owners weather strip and caulk aroundwindows and doors to keep the cold air out and the warm air in. Duringheating months, home owners want their homes as airtight as possible.While it is good to make your home energy efficient, your homeneeds to breathe. Fresh air must enter your home. All fuel-burningappliances need fresh air for proper combustion and ventilation.Exhaust fans, fireplaces, clothes dryers, and fuel burning appliancesdraw air from the house to operate. You must provide adequate freshair for these appliances. This will insure proper venting of ventedfuel-burning appliances.PROVIDING ADEQUATE VENTILATIONThe following are excerpts from National Fuel Gas Code, ANSIZ223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation.All spaces in homes fall into one of the three following ventilationclassifications:1. Unusually Tight Construction2. Unconfined Space3. Confined SpaceThe information on pages 4 and 5 will help you classify your spaceand provide adequate ventilation.Unusually Tight ConstructionThe air that leaks around doors and windows may provide enoughfresh air for combustion and ventilation. However, in buildings ofunusually tight construction, you must provide additional fresh air.Unusually tight construction is defined as constructionwhere:a. walls and ceilings exposed to the outside atmospherehave a continuous water vapor retarder with a rating ofone perm (6 x 10-11 kg per pa-sec-m 2) or less with open-ings gasketed or sealedandb. weather stripping has been added on openable windowsand doorsandc. caulking or sealants are applied to areas such as jointsaround window and door frames, between sole platesand floors, between wall-ceiling joints, between wall pan-els, at penetrations for plumbing, electrical, and gaslines, and at other openings.If your home meets all of the three criteria above, you mustprovide additional fresh air. SeeVentilation Air From Out-doors, page 5.If your home does not meet all of the three criteria above,proceed toDetermining Fresh-Air Flow For Heater Location.Confined and Unconfined SpaceThe National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines aconfined space as a space whose volume is less than 50 cubic feetper 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input ratingof all appliances installed in that space and an unconfined space asa space whose volume is not less than 50 cubic feet per 1,000 Btu perhour (4.8 m3 per kw) of the aggregate input rating of all appliancesinstalled in that space. Rooms communicating directly with thespace in which the appliances are installed*, through openings notfurnished with doors, are considered a part of the unconfined space.* Adjoining rooms are communicating only if there are doorlesspassageways or ventilation grills between them.DETERMINING FRESH-AIR FLOW FORHEATER LOCATIONDetermining if You Have a Confined orUnconfined SpaceUse this work sheet to determine if you have a confined or unconfined space.Space: Includes the room in which you will install heater plus any adjoiningrooms with doorless passageways or ventilation grills between the rooms.1. Determine the volume of the space (length x width x height).Length x Width x Height = ___________ cu. ft. (volume of space)Example: Space size 22 ft. (length) x 18 ft. (width) x 8 ft. (ceilingheight) = 3168 cu. ft. (volume of space)If additional ventilation to adjoining room is supplied with grills or open-ings, add the volume of these rooms to the total volume of the space.2. Multiply the space volume by 20 to determine the maximum Btu/Hrthe space can support.__________ (volume of space) x 20 = (Maximum Btu/Hr the spacecan support)Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximumBtu/Hr the space can support)AIR FOR COMBUSTION AND VENTILATIONProviding Adequate VentilationDetermining Fresh-Air Flow For Heater Location