T-372
3–2
3.1.2
Fresh Air Makeup Vent
The function of the upper fresh air makeup vent is to provide ventilation for commodities that require fresh air
circulation. A manually operated venting system is located in the upper left access panel.
3.1.3
Evaporator Section
The evaporator section is shown in
. The evaporator fans circulate air through the container by pulling it into
the top of the unit, directing it through the evaporator coil to be heated or cooled, and discharging it at the bottom.
Most evaporator components are accessible by removing the upper rear panel or by removing the evaporator fan
access panels.
Figure 3.2 Evaporator Section
1) Evaporator Fan #1
2) Return Temperature Sensor (RTS), Return
Recorder Sensor (RRS)
3) Humidity Sensor (HS) location
4) Evaporator Fan #2
5) Evaporator Coil
6) Evaporator Coil Heaters
7) Defrost Temperature Sensor (DTS)
8) Heat Termination Thermostat (HTT)
9) Electronic Expansion Valve (EEV)
10) Evaporator Temperature Sensors (ETS1 / ETS2)
11) Interrogator Connector Receptacle (ICR)
12) USDA Probe Receptacle PR2
13) USDA Probe Receptacle PR1
14) USDA Probe Receptacle PR3
15) Cargo Probe Receptacle PR4
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