11
SPECIFICATIONS
MP-4000 CONTROLLER SPECIFICATIONS
Temperature Controller:
Type
MP-4000 is a controller module for the Thermo King Unit. Additional
requirements can be met by means of expansion modules. The MP4000 is solely
responsible for temperature regulation of the reefer container, but other monitoring
equipment can be used in conjunction with the MP 4000 - such as a chart recorder.
Setpoint Range
-40.0 to +30.0 C (-31.0 to +86.0 F)
Digital Temperature Display
-60.0 to +80.0 C (-76.0 to +176.0 F)
Controller Software (Original Equipment):
Version
See controller identification decal
Defrost Initiation:
Evaporator Coil Sensor
Manual Switch or Demand Defrost Initiation:
Coil must be below 18 C (65 F).
Defrost cycle starts when technician or controller requests defrost initiation.
Timed Defrost Initiation:
Coil must be below 4 C (41 F). Defrost cycle starts 1
minute after the hour immediately following a defrost timer request for defrost
initiation. For example, if the defrost timer requests a defrost cycle at 7:35, the
defrost cycle will start at 8:01. Datalogger will record a Defrost event for each interval
in which a Defrost cycle is pending or active (i.e. both the 8:00 and 9:00 data logs).
Demand Defrost
Demand defrost function initiates defrost when:
Temperature difference between the return air sensor and defrost (evaporator coil)
sensor is too large for 90 minutes
Temperature difference between the supply air sensors and return air sensor is too
large
Defrost Timer:
Chilled mode
Evaporator Coil Temperature must be below 5C (41 F) to activate the defrost
compressor hour timer.
Summary of Contents for MP-4000
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