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7–15
T-368
7.14 EVAPORATOR FAN AND MOTOR ASSEMBLY
The evaporator fans circulate air throughout the con-
tainer by pulling air in through the bottom of the unit.
The air is forced through the evaporator coil where it is
either heated or cooled and then discharged out the
top of the refrigeration unit into the container. The fan
motor bearings are factory lubricated and do not
require additional grease.
WARNING
!
Always turn OFF the unit circuit breakers
(CB-1 & CB-2) and disconnect main
power supply before working on moving
parts.
1. Remove upper access panel (See
by removing mounting bolts and T.I.R. locking
device. Reach inside of unit and remove Ty-Rap
securing wire harness loop.
2. Remove the two lower mounting bolts that
secure the motor-fan assembly to the unit.
Loosen the two upper bolts as the motor mount
upper holes are slotted.
3. Remove motor, fan, and wiring from unit. Place
fan motor and fan on a support. Remove the wir-
ing and fan.
4. Lubricate fan motor shaft with a graphite-oil
solution (Never-Seez). Apply thread sealer (Loc-
tite H, brown in color) to the two fan set screws.
Install fan on motor. The evaporator fan locating
dimension is shown in
.
Figure 7.18 Evaporator Fan Locating Dimension
5. Connect wiring per applicable wiring diagram
and install motor and fan assembly in unit. Apply
power, momentarily, to check fan rotation.
6. Replace access panel, making sure panel does
not leak. Make sure that the T.I.R. locking device
is lockwired.
Figure 7.19 Evaporator Fan Assembly
7.15 EVAPORATOR SECTION CLEANING
Containers and Container units that are exposed to
certain fumigants may develop visible surface corro-
sion. This corrosion will show up as a white powder
found on the inside of the container and on the reefer
unit evaporator stator and fan deck.
Analyses by Carrier Transicold environmental special-
ists have identified the white powder as consisting pre-
dominantly of aluminum oxide. Aluminum oxide is a
coarse crystalline deposit most likely the result of sur-
face corrosion on the aluminum parts within the con-
tainer. If left untreated over time, it may build up in
thickness and eventually flake as a light
−
weight white
powder.
8.74 CM
3.4 Inches
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