EVCO c-pro mega RACK - Manual (Page 79)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 79
Increment number
By means of the appropriate parameter (PG04), it is possible to select one, two or three equal
powered increments for each of the configured compressors.
Each compressor will have the same number of available increments.
Possible configurations for the number of increments per compressor depend on what hardware is
being used, and the presence, or otherwise, of an expansion unit.
Example 1 - C-PRO GIGA (13 available relays) :
⋅
From 1 to 3 compressors, maximum of 3 increments
⋅
From 1 to 4 compressors, maximum of 2 increments
⋅
From 1 to 6 compressors, maximum of 1 increment
⋅
From 1 to 12 compressors, no increments
Example 2 - C-PRO GIGA + ExpansionPro 1 (26 available relays) :
⋅
From 1 to 6 compressors, maximum of 3 increments
⋅
From 1 to 8 compressors, maximum of 2 increments
⋅
From 1 to 12 compressors, maximum of 1 increment (or none)
Please note. If one of the compressor inverters is selected, it will not be possible to use incremented
compressors, i.e. the compressor increment parameter is forced to a value of zero.
Increment logic
If incremented compressors are being used, then it is possible, by means of this parameter (PC03),
to select the operational logic of the outputs dedicated to incrementing:
⋅
If set to NC the outputs will be normally energised (closed) and will be opened in order to
request greater power: Copeland type logic.
⋅
If set to NO the outputs will be normally de-energised (open) and will be closed in order to
request greater power: Feeders type logic.
Switching on/off mode
In the case where incremented compressors are being used, this parameter (PC02) allows the
increment switch on/off mode to be set.
If set to “0”:
Switch on : CppCppCpp. The program favours the complete switching on of individual
compressors prior to moving to the following compressor.
Switch off : ppCppCppC. The program favours the complete switching off of individual
compressors prior to moving to the following compressor.
If set to “1”:
Switch on : CCCpppppp. The program favours first of all switching on all compressors, and
only then acting on the increments.
Switch off : ppppppCCC. The program favours first of all switching off all steps and only
then finally switching off the compressors.
If set to “2”:
Switch on : CppCppCpp. The program favours the complete switching on of individual
compressors prior to moving to the following compressor.
Switch off : ppppppCCC. The program favours first of all switching off all increments and
only then finally switching off the compressors.
If set to “3”:
Switch on : CCCpppppp. The program favours first of all switching on all compressors, and
only then acting on the increments.