Carrier 101 Series Service And Maintenance Instructions

Also see for 101 Series: Installation, start-up, and operating instructions

Contents

Carrier 101 Series Service And Maintenance Instructions Manual pdf 3 page image

5. Furnaces are equipped with permanent, washable filters. Cleanfilters with tap water. Spray water through filter in oppositedirection of airflow.6. Rinse and let dry. Oiling or coating of filter is NOT recom-mended or required.7. Reinstall filter(s).8. Replace blower and control access doors.9. Restore electrical power to furnace.BLOWER MOTOR AND WHEELFor long life, economy, and high efficiency, clean accumulated dirtand grease from the blower wheel and motor annually.The following steps should be performed by a qualified servicetechnician.Some motors have prelubricated sealed bearings and require nolubrication. These motors can be identified by the absence of oilports on each end of the motor. For those motors with oil ports,lubricate motor every 5 years if motor is used on intermittentoperation (thermostat FAN selection in AUTO mode), or every 2years if motor is in continuous operation (thermostat FAN selec-tion in ON mode).NOTE: Remember to disconnect the electrical supply beforeremoving access doors.Clean and lubricate as follows:1. Remove blower and control access doors.2. Remove screws holding control support to blower deck, andhold control assembly out of way.3. Disconnect blower motor electrical leads from control. (SeeFig. 2.) Note location of wires for reassembly.4. Remove screws holding blower assembly to blower deck andslide blower assembly out of furnace.5. Loosen screw in strap holding motor capacitor to blowerhousing and slide capacitor out from under strap.6. Mark blower wheel, motor, and motor support in relation toblower housing before disassembly to ensure proper reassem-bly.7. Loosen setscrew holding blower wheel on motor shaft. Dis-connect ground wire attached to blower housing.8. Remove bolts holding motor mount to blower housing andslide motor and mount out of housing. Do not loosen motormount belly-band bolt unless motor is to be replaced.9. Lubricate motor (when oil ports are provided).a. Remove dust caps or plugs from oil ports located at eachend of motor.b. Use a good grade of SAE 20 nondetergent motor oil andput 1 teaspoon, 5 cc, 3/16 oz, or 16 to 25 drops in each oilport. Do NOT over-oil.c. Allow time for total quantity of oil to be absorbed by eachbearing.d. Wipe excess oil from motor housing.e. Replace dust caps or plugs on oil ports.10. Remove blower wheel from housing.a. Mark cutoff plate location to ensure proper reassembly.b. Remove screws holding cutoff plate and remove cutoffplate from housing.c. Lift blower wheel from housing through opening.11. Clean blower wheel and motor using a vacuum cleaner withsoft brush attachment. Do not remove or disturb balanceweights (clips) on blower wheel blades. The blower wheelshould not be dropped or bent as balance will be affected.12. Reinstall blower wheel by reversing items 10 a through c. Besure wheel is positioned for proper rotation.13. Reassemble motor and blower by reversing items 5 through 8.Be sure ground wire is connected as before.Be sure the motor is properly positioned in the blowerhousing. The motor oil ports must be within 45° of top of themotor after the blower assembly has been reinstalled in thefurnace.14. Reinstall and secure blower assembly in furnace.15. Reinstall control assembly. Connect blower electrical leads tocontrol. Please note that the common wire connection is3/16-in. terminal and all other wire connections are 1/4-in.terminals for assembly. DO NOT FORCE.16. Replace blower and control access doors.17. Turn on electrical power and check for speed changes betweenheating and cooling.CLEANING HEAT EXCHANGERThe following steps should be performed by a qualified servicetechnician.NOTE: Deposits of soot and carbon indicate the existence of aproblem which needs to be corrected. Take action to correct theproblem.If it becomes necessary to clean the heat exchanger because ofcarbon deposits, soot, etc., proceed as follows:1. Turn off gas and electrical power to furnace.2. Remove control and blower access doors.3. Remove vent pipe from relief box.4. Remove 2 screws that secure relief box. (See Fig. 2.)5. After labeling wires, disconnect from the following compo-nents:a. Draft safeguard switchb. Inducer motorc. Pressure switchFig. 2—Model 58YAV Upflow FurnaceA92063C OM24VHUMGRYWDRAFTSAFEGUARDSWITCHFLUECOLLECTORBOXMOUNTINGSCREWSRELIEFBOXCONTROLFILTERRETAINERWASHABLEFILTER3