Carrier 69NT40-541-001, Операция и обслуживание

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7–25 T-316
Figure 7.22 Evaporator Fan Assembly
1. Stator
2. Flat washer, 1/4
3. Bolt, 1/4-20 x 3/4
4. Locknut, 5/8-18
5. Flat washer, 5/8
6. Impeller Fan
7. Key
8. Mylar Protector
9. Evaporator Motor
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7.16.3 Assemble The Evaporator Fan Assembly
a. Assemble the motor and plastic spacer onto the stator.
b. Apply Loctite to the 1/4-20 x 3/4 long bolts and torque to 0.81 mkg (70 inch-pounds).
c. Place one 5/8 flat washer on the shoulder of the fan motor shaft. Insert the key in the keyway and lubricate
the fan motor shaft and threads with a graphite-oil solution (such as Never-seez).
d. Install the fan onto the motor shaft. Place one 5/8 flat washer with a 5/8-18 locknut onto the motor shaft and
torque to 40 foot-pounds.
e. Install the evaporator fan assembly in reverse order of removal. Torque the four 1/4-20 clamp bolts to 0.81
mkg (70 inch-pounds) Apply power momentarily to check for proper fan rotation (refer to paragraph Section
3.3 ). If fan spins backward, then motor wiring or motor is defective.
Replace access panel making sure that panel does not leak. Make sure that the T.I.R. locking device is lockwired.
7.17 EVAPORATOR FAN MOTOR CAPACITORS
Units are equipped with one of 2 types of evaporator fan motors, single, and dual capacitor. The evaporator fan
motors are of the permanent-split capacitor type.
7.17.1 When To Check For A Defective Capacitor
a. Fan motor will not change speed. For example: in the conventional perishable mode, the motors should run
in high speed. In the economy perishable mode they should switch speeds and in the frozen mode, the
motors should run in low speed.
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