Eliwell EWCM 4150 - Compressor Switch-on Policies

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Parameter Description Min Max M./U. Notes
CP10 Activation Policy 0 2 Num 0= fixed sequence 1= balancing 2= saturation
The selection policies are based mainly on the hours of operation of the compressors.
They come into play when the regulator requests the activation/deactivation of a step. This request is then distributed
to the most suitable compressor according to the compressor selection policy selected using CP10.
Compressor saturation: The saturation policy distributes all resources equally over the smallest number of
compressors possible, so far as this is compatible with other requirements, such as: compressor safety timings. The
resulting allocation is intended to have the largest possible number of compressors switched off at any one time.
Compressor balancing: The balancing policy distributes all resources equally over the largest number of compressors
possible, so far as this is compatible with other requirements, such as compressor safety timings: The resulting
allocation is intended to have the greatest possible equalization of power output levels in the compressors at any one
time.
Fixed sequence compressors: The fixed sequence policy distributes all resources starting from the compressors with
the lowest index, so far as this is compatible with other requirements, such as compressor safety timings The resulting
allocation is such as to obtain, at any given time, a maximum delivery of the compressors with lower indexes.
Hours of use of compressors
The operating time of the compressors is stored every hour in EEPROM for the purpose of:
 Managing the compressor switch-on policies;
 Enabling the signalling of an alarm if the compressor operating hours exceed the maximum operating hours
threshold.