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Unit Description
General Description
Model CSR20SL, CSR40SL and CSR40 units are
all-electric, single-piece, refrigeration units with
bottom air supply. Each unit is designed to cool
and heat containers for shipboard or overland
transit. Each unit mounts in the front wall of the
container. CSR20SL and CSR40SL units feature a
slimline frame. Fork lift pockets are provided for
installation and removal of the unit.
The frame and bulkhead panels are constructed of
aluminum and are treated to resist corrosion. A
hinged, removable evaporator compartment door
provides easy service access. All components
except the evaporator coil and electric heaters can
be replaced from the front of the unit. Each unit is
equipped with an 18.3 m (60 ft.) power cable for
operation on 460-380V/3 Ph/60-50 Hz power. For
operation on 460-380V/3 Ph/60-50 Hz power,
plug the 460-380V power cable into the proper
power supply. The unit power cable is stored
below the control box in the condenser section.
Each unit is equipped with 460-380V/3
Ph/60-50 Hz electric motors. An automatic phase
correction system provides the proper electrical
phase sequence for condenser fan, evaporator fan
and compressor operation. Unit features include a
flanged scroll compressor with a liquid injection
system; 2-speed evaporator fans; a fresh air
exchange system; and a MP-3000 controller with
integral data logger.
Scroll Compressor with Liquid
Injection Cooling System
The refrigeration unit includes a scroll compressor
(one stationary and one orbiting member) with
ambient compensated internal overload and high
temperature protectors, and a refrigerant injection
system.
MP-3000 Controller
The MP-3000 controller incorporates refrigeration
system component control, thermostat, digital
thermometer, fault indication and data recording
capabilities into one self-contained package.
The controller mounts in a weather tight,
corrosion resistance enclosure. A large-character
LED display (top) provides easy viewing of the
control sensor temperature (return or supply air
temperature). A 4-line, 20-character LCD display
(bottom) display shows important data including
the setpoint temperature, controller main menu
tree and important unit operating data.
Sixteen general purpose keys are used to enter and
scroll through the controller menu tree and
message text; initiate pre-trip and function tests;
enter new setpoint temperature; and enter trip
information. The keyboard supports both
numerical and text input. Four special keys
provide quick access to set-point temperature
change, manual defrost initiation, alternate
return/supply air temperature display, and
alternate temperature scale (C/F) display.
Status indicator LEDs in the controller display
signal compressor, heat, defrost, in-range, alarm,
humidity, supply temperature display and return
temperature display.
A data logger incorporated in the MP-3000
controller records sensor temperatures as well as
loss of power, alarms, unit operating modes,
sensor failure, setpoint change and unit shutdown
indications. All data recordings are stored in a
RAM memory that is backed by battery.
Data logging interval is selectable from 1 minute
and 1/2, 1, 2 or 4 hours. The 1 minute interval is
intended for special data recording or diagnosis
requirements and only records data for 72
minutes. The controller then clears the data logger
memory and returns to the previous logging
interval.
When a 1 hour logging interval is selected, the
data logger memory can store approximately 680
days of information. The logging of USDA
sensors is fixed at 1 hour intervals to comply with
USDA requirements.
The data logger clock is factory set at UTC time.
All data logs include the time and date; setpoint
temperature; and supply, return, USDA1, USDA2
and USDA3 sensor temperatures. All temperature
logs can be viewed from the controller’s LCD
message display.
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