Compressor Rack; Compressors With Different Capacity Power - Emerson Dixell iChill IC200D EVO Series Installing And Operating Instructions

17. COMPRESSOR RACK

The Ichill can manage a compressor rack:

the machine must have only one gas circuit

the machine must work only in cooling mode (machine only chiller)

the machine has to regulate in proportional mode

the machine must have max. ON/OFF compressors
The parameter Cr01 allows to enable the compressor rack regulation:
Cr01 = 0 Compressor rack regulation disabled
Cr01 = 1 Compressor rack enabled and regulation on the probe defined by parameter ST09
Cr01 = 2 Compressor rack enabled and regulation on the evaporator trasducer (that has to be
configured)
It is possible to choose the number of compressors the controller can use in case of regulation faulty probe;
the parameter involved is Cr08.
It is possible to choose the number of condenser fan steps the controller can use in case of faulty probe; the
parameter involved is Cr09.
The Energy Saving function, in case of compressor rack unit, has dedicated set point and differential
(parameter Cr06 = "Energy saving offset for compressor rack unit", Cr07 = "Energy saving differential for
compressor rack unit")

18. COMPRESSORS WITH DIFFERENT CAPACITY POWER

The function is enabled if:

one circuit unit

at least 2 compressor are configured

the capacity of the compressors is not 0 and different for each one
Parameters involved:
CF67 Compressor 1 capacity
CF68 Compressor 2 capacity
CF69 Compressor 3 capacity
CF70 Compressor 4 capacity
CF71 Compressor 5 capacity
CF72 Compressor 6 capacity
CF73
Maximum number of start up of the compressor in 15 minutes
0= Not enabled
Example: circuit with 2 compressors:

step 1: first compressor to be activated is the compressor with lower capacity
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