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

Also see for 59SC2B: Product data

78To re-install Condensate Drain and Trap:1. Remove adhesive backing from condensate trap gasket2. Install gasket on collector box3. Align the condensate trap with the drain opening on the col-lector box and secure the trap with the screw4. Attach the relief hose to the relief port on the condensatetrap and collector box.5. Secure tubing to prevent any sags or traps in the tubing.6. Connect condensate drain elbow or drain extension elbowto the condensate trap7. Connect the leads of the condensate heat pad (if used)8. Connect external drain piping to the condensate drain elbowor drain extension pipe.9. Turn gas on at electric switch on gas valve and at externalshut-off or meter10. Turn power on at external disconnect, fuse or circuit break-er.11. Run the furnace through two complete heating cycles tocheck for proper operation12. Install control door when complete.Checking Heat Pad Operation (If Applicable)In applications where the ambient temperature around the furnaceis 32_F or lower, freeze protection measures are required. If thisapplication is where heat tape has been applied, check to ensure itwill operate when low temperatures are present.NOTE: The Heat Pad, when used, should be wrapped around thecondensate drain trap. There is no need to use heat tape within thefurnace casing. Most heat tapes are temperature activated, and it isnot practical to verify the actual heating of the tape. Check thefollowing:1. Check for signs of physical damage to heat tape such asnicks, cuts, abrasions, gnawing by animals, etc.2. Check for discolored heat tape insulation. If any damage ordiscolored insulation is evident, replace heat tape.3. Check that heat tape power supply circuit is on.Cleaning Heat ExchangersThe following items must be performed by a qualified servicetechnician.Primary Heat ExchangersIf the heat exchangers get an accumulation of light dirt or dust onthe inside, they may be cleaned by the following procedure:NOTE: If the heat exchangers get a heavy accumulation of sootand carbon, both the primary and secondary heat exchangersshould be replaced rather than trying to clean them thoroughly dueto their intricate design. A build--up of soot and carbon indicatesthat a problem exists which needs to be corrected, such as improperadjustment of manifold pressure, insufficient or poor qualitycombustion air, improper vent termination, incorrect size ordamaged manifold orifice(s), improper gas, or a restricted heatexchanger (primary or secondary). Action must be taken to correctthe problem.1. Turn off gas and electrical supplies to furnace.ELECTRICAL SHOCK, FIRE OR EXPLOSIONHAZARDFailure to follow this warning could result in personalinjury or death, or property damage.Before installing, modifying, or servicing system, mainelectrical disconnect switch must be in the OFF position andinstall a lockout tag. There may be more than onedisconnect switch. Lock out and tag switch with a suitablewarning label. Verify proper operation after servicing.! WARNINGELECTRICAL SHOCK AND FIRE HAZARDFailure to follow this warning could result in personal injury,death, and/or property damage.Turn off the gas and electrical supplies to the furnace andinstall lockout tag before performing any maintenance orservice. Follow the operating instructions on the labelattached to the furnace.! WARNING2. Remove control door.3. Disconnect wires or connectors to flame rollout switch, gasvalve, igniter, and flame sensor.4. Using backup wrench, disconnect gas supply pipe from fur-nace gas control valve.5. Remove two screws attaching top filler plate and rotate up-wards to gain access to screws attaching burner assembly tocell panel.6. Remove screws attaching burner assembly to cell panel.See Fig. 68.NOTE: Burner cover, manifold, gas valve, and burner assemblyshould be removed as one assembly.7. Clean heat exchanger openings with a vacuum and a softbrush. See Fig. 65.NOTE: After cleaning, inspect the heat exchangers to ensure theyare free of all foreign objects that may restrict flow of combustionproducts.8. Reverse items 6 through 1 for reassembly.9. Refer to furnace wiring diagram and reconnect wires toflame rollout switch, gas valve, igniter, and flame sensor.10. Turn on gas and electrical supplies to furnace.11. Check furnace operation through 2 complete heat operatingcycles. Look at burners. Burner flames should be clear blue,almost transparent. See Fig. 66.12. Check for gas leaks.59SC2C