Carrier 59SC2C Series Installation, Start-up, Operating And Service And Maintenance Instructions

Also see for 59SC2B: Product data

46that diameter pipe MAY NOT be used for venting thefurnace. Try the next larger diameter pipe.NOTE: If the calculated Total Equivalent Vent Lengths results indifferent diameter pipes for the vent and combustion air, select thelarger diameter for both pipes.NOTE: If the Maximum Vent Length for diameter of the pipeselected is longer than the measured length and the equivalentlength of all the fittings and terminations (TEVL), recalculateTotal Equivalent Vent Length using the next smaller diameter. Ifthe Maximum Equivalent Vent Length is still longer than thelonger TEVL of the vent pipe or combustion air pipe, then thatdiameter of pipe selected may be used.When installing vent systems pipe lengths of 10 ft. (3 M) or less,use the smallest allowable pipe diameter. Using a pipe size greaterthan required for short venting systems may result in loss ofefficiency, incomplete combustion, flame disturbance, or flamesense lockout.For vent systems longer than 10 ft. (3 M), any larger diameter ventpipe shown in Table 16 FOR THAT SIZE FURNACE may beused.Combustion Air and Vent Piping InsulationGuidelinesNOTE: Use closed cell, neoprene insulation or equivalent.The vent pipe may pass through unconditioned areas. The amountof exposed pipe allowed is shown in Table 15.1. Using winter design temperature (used in load calculations),find appropriate temperature for your application and fur-nace model.2. Determine the amount of total and exposed vent pipe.3. Determine required insulation thickness for exposed pipelength(s).4. When combustion air inlet piping is installed above a sus-pended ceiling, the pipe MUST be insulated with moistureresistant insulation such as Armaflex or other equivalenttype of insulation.5. Insulate combustion air inlet piping when run in warm, hu-mid spaces.6. Install the insulation per the insulation manufacturer’s in-stallation instructions.NOTE: Pipe length (ft. / M) specified for maximum pipe lengthslocated in unconditioned spaces cannot exceed total allowable pipelength as calculated from Table 16.Configure the FurnaceCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in personalinjury or death.To route the vent pipe and combustion air pipe through thefurnace, the manufacturer supplied kit must be used. Failureto properly seal the blower compartment from the furnacevestibule could result in the circulation of carbon monoxidethroughout the structure. The vent pipe and combustion airpipe must be a continuous pipe while passing through theblower compartment. Seals supplied in this kit must beinstalled per the instructions provided. Follow allprocedures outlined in these instructions.WARNING!Near Furnace Vent ConnectionsOffsets in the vertical portion of the vent pipe should be made with45 deg. elbows instead of 90 deg. elbows. Short horizontal runs ofvent pipe are difficult to pitch correctly and may trap water in thevent pipe. See Fig. 41.Trapped water in the vent pipe may result in nuisance pressureswitch tripping.Install the Vent and Combustion Air PipesWith the furnace installed in the required position, remove thedesired knockouts from the casing. It will be necessary to removeone knockout for the vent pipe and the other knockout for thecombustion air connection. See Fig. 12.Use a flat blade screwdriver and tap on the knockout on oppositesides, where the knockout meets the casing. Fold the knockoutdown with duct pliers and work the knockout back and forth untilit is removed. Trim any excess metal from the knockout with tinsnips.The vent elbow can be rotated to the required location on thecasing if necessary. See Fig. 40. To rotate the vent elbow:1. Loosen the clamp on the inlet of the vent elbow attached tothe inducer.2. Rotate the vent elbow to the required position. There arerounded notches on the vent elbow to align it with theinducer housing for each orientation.3. Tighten the clamp around the vent elbow. Torque the clampto 15 lb--in. See Fig. 44--47.Installing the Vent Pipe Adapter and Combustion AirPipe AdapterCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in personalinjury or death.To route the vent pipe and combustion air pipe through thefurnace, the manufacturer supplied kit must be used. Failureto properly seal the blower compartment from the furnacevestibule could result in the circulation of carbon monoxidethroughout the structure. The vent pipe and combustion airpipe must be a continuous pipe while passing through theblower compartment. Seals supplied in this kit must beinstalled per the instructions provided. Follow allprocedures outlined in these instructions.WARNING!CARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in personal injuryor death.DO NOT use cement to join polypropylene venting systems.Follow the polypropylene venting system manufacturer’sinstructions for installing polypropylene venting systems.! WARNINGNOTE: The rubber coupling that attaches to the vent pipe adaptermust be used. The adapter seals the vent pipe to the casing andreduces the strain on the vent elbow attached to the inducer.1. Apply the gaskets to the vent pipe and combustion air pipeadapters. If supplied, remove and discard round center“slug” from interior of gasket. See Fig. 39.NOTE: The vent pipe adapter can be distinguished from the inletpipe adapter by the absence of an internal pipe--stopping ring. Thevent pipe can pass through the vent pipe adapter; it cannot passthrough the inlet pipe adapter.2. Align the screw holes in the plastic vent pipe adapter withthe dimples in the casing.59SC2C