Evaporator Section; Figure 2. Evaporator Section - Carrier 69NT40-489-100 Series Operation And Service Manual

2.1.3 Evaporator Section

The evaporator section (Figure 2) contains the return air
temperature sensor, thermostatic expansion valve,
dual-speed evaporator
evaporator coil and heater, drain pan heater, defrost
heaters, defrost temperature sensor, heat termination
thermostat, and heat exchanger.
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1. Evaporator Fan Motor #1
2. Humidity Sensor
3. Return Air Temperature Sensor
4. Evaporator Fan Motor #2
5. Defrost Temperature Sensor
6. Heater Termination Thermostat
7. Evaporator Coil
8. Drain Pan Heater
T-305
fans (EM1 and EM2),
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Figure 2. Evaporator Section

The evaporator fans circulate air through the container
by pulling it in the top of the unit, directing it through the
evaporator coil, where it is heated or cooled, and
discharging it at the bottom.
The evaporator components are accessible by
removing the upper rear panel (as shown in the
illustration) or by removing the front access panels.
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9. Thermostatic Expansion Valve
10. Heat Exchanger
11. Interrogator Connector (Rear)
12. USDA Probe Receptacle PR2
13. USDA Probe Receptacle PR1
14. USDA Probe Receptacle PR3
15. Cargo Probe Receptacle PR4
16. Evaporator Coil Heaters
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HTT Alternate Location
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