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.33For vent termination clearance, references to National codes for DirectVent/2-Pipe system (see Fig. 60) and for Ventilated CombustionAir/Non-direct Vent/1-Pipe system, see Fig. 61. For exterior terminationarrangements, for Direct Vent/2-Pipe system (see Fig. 62) and forVentilated Combustion Air/Non-Direct/1-Pipe system, see Fig. 63.Contact Local code authorities for other requirements to and/orexemptions from the National codes shown in the figures.Roof termination is often preferred since it is less susceptible to damageor contamination, is usually located away from adjacent structures, isless prone to icing conditions, and and it often has less visible ventvapors. Sidewall terminations may require sealing or shielding ofbuilding surfaces with a corrosive resistance material due to thecorrosive properties of combustion products from the vent system, aswell as protection of adjacent structures.Roof termination is the recommended termination location. Roofterminations provide better performance against sustained prevailingwinds. The roof location is preferred since the vent and combustion airsystem is less susceptible to damage or contamination. The terminationis usually located away from adjacent structures or other obstacles suchas inside corners, windows, doors or other appliances. It is less prone toicing conditions, and it often has less visible vent vapors.Sidewall terminations may require sealing or shielding of buildingsurfaces with a corrosive resistance material due to the corrosiveproperties of combustion products from the vent system, as well asprotection of adjacent structures.RECOMMENDED SUPPORT FORWhen determining appropriate location for termination, consider thefollowing guidelines:1. Comply with all clearance requirements stated (see Fig. 60 orFig. 61) per application.2. The vent termination must be located at least 3 feet from an insidecorner and follow the clearance distances in the Inside CornerTermination drawing.3. Termination or termination kit should be positioned where ventvapors will not damage plants/shrubs, air conditioning equipmentor utility meters.4. Do not locate termination directly into prevailing winds.Termination should be positioned so that it will not be affected bysustained prevailing winds over 30 mph, wind eddy, such as insidebuilding corners, or by recirculation of flue gases, airborne leaves,or light snow.5. Termination or termination kit should be positioned where it willnot be damaged by or subjected to foreign objects such as stones,balls, etc.6. Termination or termination kit should be positioned where ventvapors are not objectionable.Direct Vent / 2-Pipe SystemDirect vent (2-pipe) vent and combustion air pipes must terminateoutside the structure. For references to vent clearances required byNational code authorities, see Fig. 60. Allowable vent and combustionair terminations, see Fig. 62.Ventilated Combustion AirThe vent pipe for a Ventilated Combustion Air System must terminateoutdoors. For references to vent clearances required by National codeauthorities, see Fig. 61. Allowable vent terminations, see Fig. 63. Thecombustion air pipe terminates in a well-ventilated attic or crawl space.Follow the clearances, see Fig. 64.The combustion air pipe cannot terminate in attics or crawl spaces thatuse ventilation fans designed to operate in the heating season. Ifventilation fans are present in these areas, the combustion air pipe mustterminate outdoors as a Direct Vent System.Non-Direct Vent / 1-Pipe SystemThe vent pipe for a Non Direct Vent (1-pipe) system must terminateoutdoors. References to vent clearances required by National Codeauthorities, see Fig. 61. Allowable vent terminations, see Fig. 63.A combustion air inlet pipe to the outdoors is not required for aNon-Direct (single-pipe) Vent System. A 12-in. long section of pipe witha tight radius 2-in. (51 mm) 90 degree elbow is required to be attached tothe furnace, see Fig. 48. This short inlet air pipe helps to ensure stablecombustion, as well as allow for sound attenuation. To aid soundattenuation, point the inlet air pipe away from occupants. An extra elbowand/or five feet of pipe may be used to accomplish the sound attenuationfunction.WARNING!CARBON MONOXIDE POISONING HAZARDFailure to follow the instructions outlined below for each appliancebeing placed into operation could result in carbon monoxide poisoningor death.The instructions included with this furnace DO NOT APPLY to ventsystems that are located below the furnace. CAREFULLY FOLLOWTHE INSTRUCTIONS PROVIDED WITH THE EXTERNALVENT TRAP KIT FOR LAYING OUT THE VENTING SYSTEMAND THE DRAIN SYSTEM when all or part of the venting system isplaced below the furnace.Proper configuration of the venting and drain system is critical whenplacing all or part of the venting system below the level of the furnace.VENT GASSES COULD BE RELEASED FROM THEDRAINAGE SYSTEM if the instructions provided with the ExternalVent Trap Kit are not followed.NOTICE!VENT TERMINATIONSIt is recommended that sidewall vent terminations in excess of 24inches (0.6 M) or rooftop terminations in excess of 36 inches (1 M) invertical length be supported by EITHER the Direct Vent TerminationKit (Table 14) or by field-supplied brackets or supports fastened to thestructure.WARNING!CARBON MONOXIDE POISONING HAZARDFailure to follow the instructions outlined below for each appliancebeing placed into operation could result in carbon monoxide poisoningor death.For all venting configurations for this appliance and other gasappliances placed into operation for the structure, provisions foradequate combustion, ventilation, and dilution air must be provided inaccordance with:Current edition of Section 9.3 NFPA 54/ANSI Z223.1 Air forCombustion and Ventilation and applicable provisions of the localbuilding codes.