Carrier 69NT40-561-300, Operation And Service Manual

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2–1 T-365
SECTION 2
INTRODUCTION
2.1 INTRODUCTION
The Carrier Transicold model 69NT40-561-300 through 399 series units are of lightweight aluminum frame con-
struction, designed to fit in the front of a container and serve as the container’s front wall.
They are one piece, self-contained, all electric units, which include cooling and heating systems to provide precise
temperature control.
The units are supplied with a complete charge of refrigerant R-134a and compressor lubricating oil, and are ready
for operation upon installation. Forklift pockets are provided for unit installation and removal.
The base unit operates on nominal 380/460 volt, 3-phase, 50/60 hertz (Hz) power. An optional autotransformer
may be fitted to allow operation on nominal 190/230, 3-phase, 50/60 Hz power. Control system power is provided
by a transformer which steps the supply power down to 18 and 24 volts, single phase.
The controller is a Carrier Transicold Micro-Link 3 microprocessor. The controller operates automatically to select
cooling, holding or heating as required to maintain the desired set point temperature within very close limits.
The controller has a keypad and display for viewing or changing operating parameters. The display is also
equipped with lights to indicate various modes of operation.
2.2 CONFIGURATION IDENTIFICATION
Unit identification information is provided on a plate located on the back wall of the condenser section. The plate
provides the unit model number, the unit serial number and the unit parts identification number (PID). The model
number identifies the overall unit configuration, while the PID number provides information on specific optional
equipment, factory provisioned to allow for field installation of optional equipment and differences in detailed parts.
2.3 FEATURE DESCRIPTIONS
2.3.1 Control Box
Units are equipped with an aluminum control box, and may be fitted with a lockable door.
2.3.2 Temperature Readout
The unit is fitted with suction and discharge refrigerant temperature sensors. The sensor readings may be viewed
on the controller display.
2.3.3 Pressure Readout
The unit is fitted with evaporator, suction, and discharge pressure transducers. The transducer readings may be
viewed on the controller display.
2.3.4 Compressor
The unit is fitted with a scroll compressor equipped with suction and discharge service connections.
2.3.5 Condenser Coil
The unit is fitted with a two-row square formed condenser coil using 7mm tubing.
2.3.6 Condenser Fan Operation
Units are equipped with a three phase, dual speed condenser fan motor. Opening of condenser fan motor internal
protector will stop the fan motor and the controller will subsequently shut down the compressor.
2.3.7 Evaporator
The evaporator section is equipped with an electronic expansion valve (EEV).
2.3.8 Evaporator Fan Operation
Units are equipped with three-phase evaporator fan motors. Opening of an evaporator fan internal protector will
shut down the unit.