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1-1 T -309
SECTION 1
INTRODUCTION
1.1 INTRODUCTION
The C arrier Transicold model 69NT20--531-300 units
are of lightweight aluminum frame construction,
designed to fit in the front of a container and serve as the
container front wall.
They are one piece, self-contained, all electric units
which are fitted with 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 power. An optional autotransformer
may be fitted to allow operation on nominal 190/230 , 3
phase, 50/60 hertz 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 2i
microprocessor. The controller will operate
automatically to select cooling, holding or heating as
required t o maintain the desired set point temperature
within very close limits.
The controller is fitted with a keypad and display for
viewing or changing operating parameters. The display
is also equipped with lights to indicatevarious modesof
operation.
1.2 CONFIGURATION IDENTIFICATION
Unit identification information is provided on a model
plate located to the left of the economizer. The plate
provides the unit model 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 i dentification for the models covered
herein are provided i n the Carrier Transicold Container
Unit Matrix manual, publication T--300. Printed copies
of the T --300 may be obtained from Carrier Transicold.
Also, aweekly updated copymay befoundat theCarrier
Web site, www.carrier.refrigeration.com.
1.3 OPTION DESCRIPTIONS
Various options may be factory or field fitted to the base
unit. B rief descriptions of the options are provided in
the following subparagraphs.
1.3.1 Battery
The controller may be fitted with standard replaceable
batteries or a rechargeable battery pack.
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 the dehumidification mode the controller
will operate to reduce internal container moisture level.
1.3.3 Control Box
The control box is constructed of composite material
and may be fitted with a lockable door.
1.3.4 Temperature Readout
The unit may be fitted with suction and discharge
temperature sensors. The sensor readings may be
viewed on the controller display.
1.3.5 Pressure Readout
The unit may be fitted with factory installed suction and
discharge pressure gauges. The unit is fitted with
suction and discharge transducers. The readings may be
viewed on the controller display.
1.3.6 Interrogator
Unitsthat usethe DataCORDER functionarefittedwith
interrogator receptacles for connection of equipment to
download the recorded da ta. Two receptacles may be
fitted, one accessible from the front of the unit and the
other mounted inside the container (with the USDA
receptacles).
1.3.7 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.
1.3.8 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.
1.3.9 Compressor
The unit is fitted with a scroll compressor.
1.3.10 Back Panels
Back panel designs that may be fitted i nclude panels of
aluminum and stainless steel. Panels may be fitted with
access doors and/or hinge mounting.