Carrier 69NT40-511-199 To assemble the Evaporator Fan Assembly, Evaporator FAN Motor Capacitors

by holding the spanner wrench stationary and turning the 5/8-18 nut counter-clockwise (see Figure 6-18).

45

6

3

25

1

7

8

9

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

Figure 6-18. Evaporator Fan Assembly

2.Remove the spanner wrench. Use a universal wheel puller and remove the fan from the shaft. Remove the washers and key.

3.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.

To assemble the Evaporator Fan Assembly:

1.Assemble the motor and plastic spacer onto the stator.

2.Apply loctite to the 1/4-20 x 3/4 long bolts and torque to 0.81 mkg (70 inch-pounds).

3.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).

4.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.

d.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 section 2.3). If fan spins backward, then motor wiring or motor is defective.

e.Replace access panel making sure that panel does not leak. Make sure that the T.I.R. locking device is lockwired.

6.16 EVAPORATOR FAN MOTOR CAPACITORS

The evaporator fan motors are of the permanent-split capacitor type. The motor is equipped with one capacitor (used in the high speed circuit) and another capacitor used for the low speed circuit.

a. When to check for a defective capacitor

1.Fan motor will not change speed. For example: controller settings above -10_C (+14_F), or -5_C (+23_F) optionally, should cause the motor to run in high speed.

NOTE

The evaporator fan motors will always start in high speed.

Controller settings below -10_C (+14_F), or -5_C (+23_F) optionally, should cause the motor to run in low speed.

2.Motor running in wrong direction (after checking for correct wiring application).

b. Removing the capacitor

WARNING

Make sure power to the unit is OFF and power plug disconnected before removing capacitor(s).

1.The capacitor located on the motor and above the evaporator fan deck may be removed by two methods:

(a)If container is empty, open upper rear panel of the unit. The capacitor may be serviced after disconnecting power plug.

(b)If container is full, turn the unit power OFF and disconnect power plug. Remove the evaporator fan motor access panel. (See Figure 2-1). For removal of the evaporator fan assembly, refer to section 6.15.

SECTION 6

6-17 T-268-07