T-372
2–2
2.4.4
Compressor
The unit is fitted with either an R-134a or an R-513A-ready scroll compressor equipped with suction and discharge
service connections. To identify an R-513A-ready compressor in the field, a green dot is located on the top of the
compressor on the DUV fitting.
2.4.5
Condenser Coil
The unit is fitted with a “C” shape condenser coil.
2.4.6
Evaporator
The evaporator section is equipped with an electronic expansion valve (EEV).
2.4.7
Evaporator Fan Operation
Units are equipped with three-phase evaporator fan motors. Opening of an evaporator fan internal protector will
shut down the unit.
2.4.8
Plate Set
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.
2.5 Option Descriptions
Various options may be factory or field equipped to the base unit. These options are described in the following sub-
paragraphs.
2.5.1
Battery
The refrigeration controller may be fitted with standard replaceable batteries or a rechargeable battery pack.
Carrier-provided rechargeable batteries can be recharged via the ML5 controller and allow for wireless
communication in battery mode. A non-carrier rechargeable 3-wire battery would charge but the controller will not
monitor anything related to it. A standard 2-wire NiCAD battery would not charge.
NOTE
If ambient temperature is greater than 45 deg C, the carrier-provided rechargeable batteries will not
charge.
2.5.2
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.
2.5.3
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.
2.5.4
Interrogator Receptacle
The unit has one external interrogator receptacle for connection of equipment for calibration. It is located inside the
unit along side the USDA receptacles. It can also be used to download recorded data from the DataCORDER.
NOTE
The Micro-Link 5 controller has a USB micro port and wireless capability to allow viewing of
DataCORDER data.
2.5.5
Quest
Quest (Quality and Energy Efficiency in Storage and Transport) power saving mode helps shipping lines lower their
operating costs by decreasing the system’s run time, energy usage and emissions. Quest 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.
