Unit Description
30
A high speed serial communication port provides
data retrieval using a DRU-II hand-held data
retriever or laptop computer with SmartSponge™
software, or a REFCON power line remote
monitoring system.
Dual Speed Evaporator Fans
CSR models are equipped with either 2 or 3
evaporator fans. All models feature 2-speed
motors. The evaporator fans operate continuously
to circulate air inside the container. The fans
operate on high speed for perishable cargo at
setpoints of -9.9 C (14.1 F) and above. At
setpoints of -10 C (14 F) and below, the
evaporator fans operate on low speed for frozen
cargo. The evaporator fan low speed rpm is
one-half the high speed rpm.
NOTE: If Economy mode is on:
Fresh Loads: Evaporator fans operate on low
speed when container temperature is in-range.
Frozen Loads: Evaporator fans stop during the
Null mode; controller operates fans on low speed
for 5 minutes every 45 minutes.
Fresh Air Exchange System
The fresh air exchange system removes harmful
gases from containers carrying sensitive
perishable commodities. The fresh air vent is
located above the control box. The fresh air vent
is adjustable to accommodate a variety of cargo
and chilled load operating conditions. The fresh
air vent should be tightly closed when carrying
frozen cargo.
Unit Options
Advanced Fresh Air Management
(AFAM)
An advanced microprocessor controlled fresh air
management system provides programmable
control of the air exchange rate, programmable
delayed vent opening, automatic closure of the air
exchange vent during low ambient conditions, and
data logging of the air exchange rate and vent
opening delay interval.
The AFAM system includes a door control
module, vent door and vent grille. The MP-3000
controller sends a communication signal to the
door control module to position to vent door to the
desired position. The controller can also be set to
delay opening of the fresh air vent for up to 72
hours, in 1-hour increments. This allows faster
product temperature pull-down.
The system is precalibrated for air exchange rates
of 0 to 160 m
3
/hr (0 to 96 ft
3
/min) on CSR20SL
and CSR20SL; and 0 to 280 m
3
/hr. (0 to 165
ft
3
/min) on CSR40SL, CSR40SL, CSR40 and
CSR40. The actual door position is based on the
air exchange setting, the power supply frequency
(Hertz).
Advanced Fresh Air Management
Plus (AFAM+)
An advanced microprocessor controlled fresh air
management system also provides programmable
control of the O
2
and CO
2
levels in the container,
and data logging of the O
2
and CO
2
gas level
readings.
The AFAM+ system includes all AFAM system
components plus a gas sensor unit, sensor filter,
vent loop, pressure relief valve assembly and
single purge port. The controller can be set to
maintain a minimum O
2
level in the container
between 0 and 21% and a maximum CO
2
level in
the container between 0 and 25%.
Bulb Mode
The Bulb mode allows the shipper to control the
evaporator fan speed and defrost termination
temperature during Dehumidification. The Bulb
mode screen setting determines the evaporator fan
speed: “FLOW CYCLE”, “FLOW HIGH”, or
“FLOW LOW”. Setting a Bulb mode fan speed
automatically activates the defrost termination
temperature setting and the Dehumidify mode
(controller sets Humidity mode to on).
Dehumidification Control System
A dehumidification system lowers the relative
humidity in the container to the humidity setpoint.
The control range is 60% to 95% while the
setpoint is adjustable from 0% to 99%.