Carrier 69NT40-541-500 Operation And Service Manual page 20

2.3.9 Evaporator Fan Operation
Units are equipped with three-phase evaporator fan motors. Opening of an evaporator fan internal protector will
shut down the unit.
2.3.10 Plate Set
Each unit is equipped with a tethered set of wiring schematic and wiring diagram plates. The plate sets are ordered
using a seven-digit base part number and a two-digit dash number.
2.4 OPTION DESCRIPTIONS
Various options may be factory or field equipped to the base unit. These options are described in the following sub-
paragraphs.
2.4.1 Battery
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.
2.4.2 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.
2.4.3 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.
2.4.4 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 is accessible from the front of the container and
the other mounted inside the container (with the USDA receptacles).
2.4.5 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 loca-
tion.
2.4.6 Quest - CCPC
Compressor-Cycle Perishable Cooling (CCPC) is a method of temperature control used during steady-state perish-
able cooling that cycles the compressor on and off according to supply / return air temperature conditions.
2.4.7 Communications 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 commu-
nication and return information over the main power line. Refer to the ship master system technical manual for fur-
ther information.
2.4.8 460 Volt Cable
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.
2.4.9 Autotransformer
An autotransformer may be provided to allow operation on 190/230, 3-phase, 50/60 hertz power. The autotrans-
former 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 autotrans-
former and communications module, the autotransformer will be fitted with a transformer bridge unit (TBU) to assist
in communications.
2.4.10 230 Volt Cable
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 customer requirements.
T-363 2–2