Carrier 69NT40-489-100 Series, Operation And Service Manual

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T-305
PART ONE -- REFRIGERATION UNIT
SECTION 1
INTRODUCTION
1.1 INTRODUCTION
The Carrier Transicold model 69NT40-489-100 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 are fitted with cooling, heating and atmosphere
control systems. The cooling and heating systems
provide precise temperature control while the Carrier
Transicold EverFresh controlled atmosphere system
continuously provides a supply of high purity nitrogen to
reduce the interior oxygen and carbon dioxide levels.
The units are suppled 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 to 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 indicate various modes of
operation.
1.2 CONFIGURATION IDENTIFICATION
Unit identification information is provided on a plate
located near the compressor. 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 on the Container Products
Group Information Center by authorized Carrier
Transicold Service Centers.
1.3 OPTION DESCRIPTION
Various options may be factory or field fitted 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 rechargeable battery pack. The
unit is fitted with the EverFresh controlled atmosphere
option, the CA controller may be fitted with the same
battery option.
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 may be of aluminum or composite
material and each type box 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 suction and discharge
pressure gauges or suction and discharge transducers
or no pressure readout. 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 accessible from the front of the container and
the other 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.