Section 2
The Carrier Transicold model 69NT40-561-300 through 399 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 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.
2.2CONFIGURATION 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.
Units are equipped with an aluminum control box, and may be fitted with a lockable door.
The unit is fitted with suction and discharge refrigerant temperature sensors. The sensor readings may be viewed on the controller display.
The unit is fitted with evaporator, suction, and discharge pressure transducers. The transducer readings may be viewed on the controller display.
The unit is fitted with a scroll compressor equipped with suction and discharge service connections.
The unit is fitted with a two-row square formed condenser coil using 7mm tubing.
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.
The evaporator section is equipped with an electronic expansion valve (EEV).
Units are equipped with three-phase evaporator fan motors. Opening of an evaporator fan internal protector will shut down the unit.
Each unit is equipped with a tethered set of wiring schematics and wiring diagram plates. The plate sets are ordered using a seven-digit base part number and a two-digit dash number.
Various options may be factory or field equipped to the base unit. These options are described in the following sub-paragraphs.
The refrigeration controller may be fitted with standard replaceable batteries or a rechargeable battery pack. Rechargeable battery packs may be fitted in the standard location or in a secure location.
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.
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.
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).
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.
Compressor-Cycle Perishable Cooling (CCPC) is a method of temperature control used during steady-state perishable cooling that cycles the compressor on and off according to supply / return air temperature conditions.
2.4.7Communications Interface Module
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.
An autotransformer may be provided to allow operation on 190/230, 3-phase, 50/60 Hz power. The autotransformer raises the supply voltage to the nominal 380/460 volt power required by the base unit. The autotransformer may also be fitted with an individual circuit breaker for the 230 volt power.
If the unit is equipped with an autotransformer and communications module, the autotransformer will be fitted with a transformer bridge unit (TBU) to assist in communications.
Rain gutters may be fitted over the control box to divert rain away from the controls.
The unit may be equipped with handles to facilitate access to stacked containers. These fixed handles are located on either side of the unit.
The unit may be fitted with ports in the front of the frame for insertion of a thermometer to measure supply and/or return air temperature. If fitted, the port(s) will require a cap and chain.
Aluminum back panels may have access doors and/or hinge mounting.
Various power cable and plug designs are available for the main 460 volt supply. The plug options tailor the cables to each customer’s requirements.
Units equipped with an autotransformer require an additional power cable for connection to the 230 volt source. Various power cable and plug designs are available. The plug options tailor the cables to each customer’s requirements.
Various designs are available for storage of the power cables. These options are variations of the compressor section cable guard.
2.4.16Upper Air (Fresh Air Make Up)
The unit may be fitted with an upper fresh air makeup assembly. The fresh air makeup assembly is available with a vent positioning sensor (VPS) and may also be fitted with screens.
2.4.17Lower Air (Fresh Air Make Up)
The unit may be fitted with a lower fresh air makeup assembly. The fresh air makeup assembly is available with a vent positioning sensor (VPS) and may also be fitted with screens.
Safety Instruction and Function Code listing labels differ depending on the options installed. Labels available with additional languages are listed in the parts list.
Two replacement controllers are available:
1.Re-manufactured - Controller is the equivalent of a new OEM controller and is supplied with a 12-month warranty.
2.Repaired - Controller has had previous faults repaired and upgraded with the latest software.
Repaired controllers are NOT to be used for warranty repairs; only full OEM Re-manufactured controllers are to be used.
Controllers will be factory-equipped with the latest version of operational software, but will NOT be configured for a specific model number and will need to be configured at the time of installation or sale.
Condenser grilles are direct bolted.
The optional eAutoFresh venting system moderates the atmospheric level inside the container unit in response to cargo respiration.
Unit may be modified for XtendFRESH atmosphere device. Refer to the T366 XtendFRESH manual for more information.