Carrier 69NT40-541-500 Operation And Service Manual
Also see for 69NT40-541-300: Operation and service
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Contents
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7–21 T-363Figure 7.17 Heater Arrangement7.14 EVAPORATOR FAN AND MOTOR ASSEMBLYThe evaporator fans circulate air throughout the container by pulling air in the top of the unit. The air is forcedthrough the evaporator coil where it is either heated or cooled and then discharged out the bottom of the refrigera-tion unit into the container. The fan motor bearings are factory lubricated and do not require additional grease.7.14.1 Replacing the Evaporator Fan AssemblyWARNING!Always turn OFF the unit circuit breakers (CB-1 & CB-2) and disconnect main power supplybefore working on moving parts.a. Remove access panel by removing mounting bolts and TIR locking device. Reach inside of unit and removethe Ty-Rap securing the wire harness loop. Disconnect the connector by twisting to unlock and pulling toseparate.b. Loosen four 1/4-20 clamp bolts that are located on the underside of the fan deck at the sides of the fanassembly. Slide the loosened clamps back from the fan assembly.c. Slide the fan assembly out from the unit and place on a sturdy work surface.7.14.2 Disassemble the Evaporator Fan Assemblya. Attach a spanner wrench to the two 1/4-20 holes located in the fan hub. Loosen the 5/8-18 shaft nut by holding the span-ner wrench stationary and turning the 5/8-18 nut counter-clockwise (see Figure 7.18).b. Remove the spanner wrench. Use a universal wheel puller and remove the fan from the shaft. Remove thewashers and key.c. Remove the four 1/4-20 x 3/4 long bolts that are located under the fan that support the motor and stator housing.Remove the motor and plastic spacer.7.14.3 Assemble the Evaporator Fan Assemblya. Assemble the motor and plastic spacer onto the stator.NOTEWhen removing the black nylon evaporator fan blade, care must be taken to assure that the blade isnot damaged. In the past, it was a common practice to insert a screwdriver between the fan blades tokeep it from turning. This practice can no longer be used, as the blade is made up of a material thatwill be damaged. It is recommended that an impact wrench be used when removing the blade. Do notuse the impact wrench when reinstalling, as galling of the stainless steel shaft can occur.b. Apply Loctite to the 1/4-20 x 3/4 long bolts and torque to 0.81 mkg (70 inch-pounds).Heater ElementBracketRetainer |
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