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T-334
SECTION 1
INTRODUCTION
1.1 INTRODUCTION
The Carrier Transicold model 69NT40-551-500 to 599
series units are of lightweight aluminum frame
construction, 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 includes 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. Power for
the control system 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
will
operate
automatically to select cooling, holding or heating as
required to maintain the desired set point temperature
within very close limits. The unit may also be equipped
with an electronic temperature recorder.
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.
1.2 CONFIGURATION IDENTIFICATION
Unit identification information is provided on a plate
located near the economizer heat exchanger, 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 provides information on specific optional
equipment, factory provision to allow for field installation
of optional equipment and differences in detailed parts.
Configuration identification for the models covered
herein may be obtained in the Container Identification
Matrix located in the Container Products Group
Information Center available to authorized Carrier
Transicold Service Centers.
1.3 OPTION DESCRIPTION
Various options may be factory or field equipped to the
base unit. These options are listed in the tables and
described in the following subparagraphs.
1.3.1 Battery
The refrigeration controller may be fitted with standard
replaceable batteries or a rechargeable battery pack.
Rechargeable battery packs may be fitted in the
standard or in a secure location.
1.3.2 Dehumidification
The unit may be fitted with a humidity sensor. This
sensor allows setting of a humidity set point in the
controller. In dehumidification mode, the controller will
operate to reduce internal container moisture level.
1.3.3 Control Box
Units are equipped with either an aluminum or
composite material box and may be fitted with a lockable
door.
1.3.4 Temperature Readout
The unit is fitted with suction and discharge temperature
sensors. The sensor readings may be viewed on the
controller display.
1.3.5 Pressure Readout
The unit is fitted with suction and discharge transducers.
The transducer readings may be viewed on the
controller display.
1.3.6 USDA
The unit may be supplied with fittings for additional
temperature probes which allow recording of USDA
Cold Treatment data by the integral DataCORDER
function of the Micro-Link refrigeration controller.
1.3.7 Interrogator
Units that use the DataCORDER function are fitted with
interrogator receptacles for connection of equipment to
download the recorded data. Two receptacles may be
fitted; one is accessible from the front of the container
and the other is mounted inside the container (with the
USDA receptacles).
1.3.8 Remote Monitoring
The unit may be fitted with a remote monitoring
receptacle. This item allows connection of remote
indicators for COOL, DEFROST and IN RANGE.
Unless otherwise indicated, the receptacle is mounted
at the control box location.
1.3.9 Communications
The unit may be fitted with a communications interface
module. The communications interface module is a
slave module which allows communication with a
master central monitoring station. The module will
respond to communication and return information over
the main power line. Refer to the ship master system
technical manual for further information.
1.3.10 Compressor
The unit is fitted with a scroll compressor, equipped
with suction, discharge and economizer service
connections.
1.3.11 Condenser Coil
The unit is fitted a four row coil using 7mm tubing.
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