Refrigeration Unit - Front Section; Fresh Air Makeup Vent; Figure 3.1 Refrigeration Unit - Front Section - Carrier 69NT40-541-001 Operation And Service

3.1 GENERAL DESCRIPTION
3.1.1

Refrigeration Unit - Front Section

The unit is designed so that the majority of the components are accessible from the front, see
upper access panels allow entry into the evaporator section, and the center access panel allows access to the ther-
mostatic expansion valve and evaporator coil heaters. The unit model number, serial number and parts identifica-
tion number can be found on the serial plate to the left of the compressor.
3.1.2

Fresh Air Makeup Vent

The function of the upper or lower makeup air vent is to provide ventilation for commodities that require fresh air
circulation.
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8
1. Access Panel (Evap. Fan #1)
2. Access Panel (Heater & Thermostatic Expan-
sion Valve)
3. Fork Lift Pockets
4. Control Box
5. Compressor
6. Unit Serial Number, Model Number and Parts
Identification Number (PID) Plate
7. Condenser Fan
SECTION 3
DESCRIPTION

Figure 3.1 Refrigeration Unit - Front Section

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6
5
1
8. TransFRESH Communications Connector
9. Interrogator Connector (Front right)
10. Temperature Recorder
11. Lower Fresh Air Makeup Vent Location (Blank
Cover Shown)
12. TIR (Transports Internationaux Routiers)
Sealing Provisions - Typical All Panels
13. Upper Fresh Air Makeup Vent
14. Access Panel (Evap. Fan #2)
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3–1
Figure 3.1. The
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T-316