Evaporator Section; Figure 2-2 Evaporator Section - Carrier 69NT40-511-300 Operation And Service

2.1.3 Evaporator Section

The evaporator section (Figure 2-2) contains the
temperature recorder bulb or return recorder sensor,
return temperature sensor, thermostatic expansion
valve, dual-speed evaporator fans (EM1 and EM2),
evaporator coil and heater, drain pan heater, defrost
heaters, defrost temperature sensor, heat termination
thermostat, and heat exchanger.
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13
1. Evaporator Fan Motor #1
2. Return Recorder Sensor
3. Return Temperature Sensor
4. Humidity Sensor
5. Mechanical Recorder Bulb
6. Evaporator Fan Motor #2
7. Defrost Temperature Sensor
8. Heater Termination Thermostat
9. Evaporator Coil
10. Drain Pan Heater
T-285
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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1
ALTERNATE USDA
LOCATION
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Figure 2-2 Evaporator Section

2-2
HTT Alternate Location
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Hermetic Thermostatic Expansion Valve
Semi--Hermetic Thermostatic Expansion Valve
Heat Exchanger
Interrogator Connector (Rear)
USDA Probe Receptacle PR2
USDA Probe Receptacle PR1
USDA Probe Receptacle PR3
Cargo Probe Receptacle PR4
Evaporator Coil Heaters
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