2–1 62-12259
SECTION 2
Unit Description
2.1 Introduction
WARNING
!
Unit may start automatically at any time even if the switch is in the OFF position. Use proper
lockout/tagout procedures before inspection/servicing. All unit inspection/servicing by prop-
erly trained personnel only.
WARNING
!
Be aware of HIGH VOLTAGE supplied at the power plug or from the generator. When perform-
ing service or maintenance procedures: ensure any two way communication is disabled in
accordance with the manufacturer’s instruction, ensure the START/ RUN-OFF switch is in OFF
position and, whenever practical, disconnect the high voltage source, lockout/tagout the
receptacle and disconnect the negative battery connection.
This manual contains operating data, electrical data and service instructions for the refrigeration unit listed in Table
2–1. Additional support manuals are listed in Table 2–2. The unit model/serial number plate is located inside the
unit on the frame as shown in Figure 2.1.
2.2 General Description
Units described in this manual are hybrid/electric, fully charged, pre-wired, refrigeration/heating “nosemount” units.
The units are used on insulated refrigerated compartments to maintain cargo temperatures within very close limits.
Electrical power is supplied to the unit from an external source, at the power supply receptacle (PSR), or by the AC
generator which is driven by the engine. The generator provides nominal 480V/3ph/60Hz power when the engine is
in high speed and nominal 350V/3ph/45Hz power in low speed.
The APX Control System includes a manual switch, control modules, fuses, and associated wiring. High voltage
contactors, fuses and the contactor control board are located in the control box. The unit may be equipped with an
optional remote light bar which mounts separately on the front outside corner of the refrigerated compartment.
Temperature control is provided by the Carrier Transicold APX control system (Refer to Section 2.5). Once the
desired temperature is set, the unit will operate automatically to maintain the desired temperature within very close
limits. When in Engine Operation, the APX Control System automatically selects high / low speed cooling or high /
low speed heating as necessary to maintain the desired temperature within the refrigerated compartment.
Standard equipment includes an auto start-stop feature. This feature provides automatic cycling of the diesel
engine, which in turn offers an energy efficient alternative to continuous operation of the engine with control of tem-
perature by alternate cooling and heating of the supply air (evaporator outlet air).
The unit may be equipped with AutoFresh Air Exchange which controls air quality and humidity for fresh produce.
To Next Page