Carrier 59CU5A Installation, Start-up, Operating And Service And Maintenance Instructions

59CU5A: Installation, Start-up, Operating and Service and Maintenance InstructionsManufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.8The following types of furnace installations may require OUTDOORAIR for combustion due to chemical exposures:• Commercial buildings• Buildings with indoor pools• Laundry rooms• Hobby or craft rooms• Chemical storage areasIf air is exposed to the following substances, it should not be used forcombustion air, and outdoor air may be required for combustion:• Permanent wave solutions• Chlorinated waxes and cleaners• Chlorine based swimming pool chemicals• Water softening chemicals• De-icing salts or chemicals• Carbon tetrachloride• Halogen type refrigerants• Cleaning solvents (such as perchloroethylene)• Printing inks, paint removers, varnishes, etc.• Hydrochloric acid• Cements and glues• Antistatic fabric softeners for clothes dryers• Masonry acid washing materialsAll fuel-burning equipment must be supplied with air for fuelcombustion. Sufficient air must be provided to avoid negative pressurein the equipment room or space. A positive seal must be made betweenthe furnace cabinet and the return-air duct to prevent pulling air from theburner area.Location Relative to Cooling EquipmentThe cooling coil must be installed parallel with, or on the downstreamside of the unit to avoid condensation in the heat exchangers. Wheninstalled parallel with the furnace, dampers or other flow control mustprevent chilled air from entering the furnace. If the dampers aremanually operated, they must be equipped with means to preventoperation of either unit unless the damper is in the full-heat or full-coolposition. Refer to Installation of Evaporator Coil section for installrequirements for unshielded coils, see Table 6.AIR FOR COMBUSTION ANDVENTILATIONIntroduction2-pipe ApplicationsWhen the furnace is installed as a 2-pipe furnace, no special provisionsfor air for combustion are required. However, other gas appliancesinstalled in the space with the furnace may require outside air forcombustion. Follow the guidelines below to ensure that other gasappliances have sufficient air for combustion.1-pipe ApplicationsWhen the furnace is installed as a 1-pipe furnace, it will be necessary toensure there is adequate air for combustion. Other gas appliancesinstalled with the furnace may also require air for combustion andventilation in addition to the amount of combustion air and ventilationair required for the furnace. Follow the guidelines below to ensure thatthe furnace and other gas appliances have sufficient air for combustion.Ventilated Combustion Air ApplicationsWhen the furnace is installed using the ventilated combustion air option,the attic or crawlspace must freely communicate with the outdoor toprovide sufficient air for combustion. The combustion air pipe cannot beterminated in attics or crawlspaces that use ventilation fans designed tooperate during the heating season. If ventilation fans are present in theseareas, the combustion air pipe must terminate outdoors as a 2-Pipesystem.All air for combustion is piped directly to the furnace from a space that iswell ventilated with outdoor air (such as an attic, crawl space orequipment closet) and the space is well isolated from the living space orgarage. In addition, other gas appliances installed in the space with thefurnace may require outside air for combustion. Follow the guidelinesbelow to ensure that the roof or crawlspace walls have sufficient freearea to provide sufficient air for combustion and ventilation for thefurnaces. The guidelines below can be used to ensure that other gasappliances have sufficient air for combustion.Provisions for adequate combustion, ventilation, and dilution air must beprovided in accordance with:• U.S.A. Installations: Current edition of Section 9.3 of the NFPA54/ANSI Z223.1 , Air for Combustion and Ventilation and applicableprovisions of the local building codes.WARNING!CARBON MONOXIDE POISONING / COMPONENTDAMAGE HAZARDFailure to follow this warning could result in personal injury or deathand unit component damage.Corrosive or contaminated air may cause failure of parts containing fluegas, which could leak into the living space. Air for combustion must notbe contaminated by halogen compounds, which include fluoride,chloride, bromide, and iodide. These elements can corrode heatexchangers and shorten furnace life. Air contaminants are found inaerosol sprays, detergents, bleaches, cleaning solvents, salts, airfresheners, and other household products. Do not install furnace in acorrosive or contaminated atmosphere. Make sure all combustion andcirculating air requirements are met, in addition to all local codes andordinances.WARNING!FIRE, INJURY OR DEATH HAZARDFailure to follow this warning could result in personal injury, deathand/or property damage.When the furnace is installed in a residential garage, the burners andburner ignition devices must be located at least 18 in. (457 mm) abovethe floor. The furnace must be located or protected to avoid damage byvehicles. When the furnace is installed in a public garage, airplanehangar, or other building having a hazardous atmosphere, the furnacemust be installed in accordance with the current edition of NFPA54/ANSI Z223.1 or CAN/CSA B149.2, see Fig. 5.CAUTION!FURNACE CORROSION HAZARDFailure to follow this caution may result in furnace damage.Air for combustion must not be contaminated by halogen compounds,which include fluoride, chloride, bromide, and iodide. These elementscan corrode heat exchangers and shorten furnace life. Air contaminantsare found in aerosol sprays, detergents, bleaches, cleaning solvents,salts, air fresheners, and other household products.