Carrier 69NT40-541-001 Operation And Service page 21

2.1 INTRODUCTION
The Carrier Transicold model 69NT40-541-001/199 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
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 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 a mechanical or 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 vari-
ous modes of operation.
2.2 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 Infor-
mation Center by authorized Carrier Transicold Service Centers.
2.3 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 sub-paragraphs.
2.3.1 Battery
The refrigeration controller may be fitted with standard replaceable batteries or a rechargeable battery pack.
2.3.2 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.
2.3.3 Control Box
Units are equipped with a composite material box and may be fitted with a lockable door.
2.3.4 Temperature Readout
The unit may be fitted with suction and discharge temperature sensors. The sensor readings may be viewed on the
controller display.
2.3.5 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.
2.3.6 USDA
The unit may be supplied with fittings for additional temperature probes which allow recording of USDA Cold Treat-
ment data by the integral DataCORDER function of the Micro-Link refrigeration controller.
2.3.7 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).
SECTION 2
INTRODUCTION
2–1 T-316