ESIE10-01 Functional Control
Part 2 – Functional Description 2–37
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Load/unload
sequence
This section defines which compressor is the next one to load or unload.
■ Next To Load
The next compressor to load must meet the following requirements:
Lowest capacity of the running compressors that can load up:
■ If capacities are equal, it must have the highest sequence number of the compressors that are
running.
■ If the sequence numbers are equal, it must have the least run hours.
■ If run hours are equal, it must have the most starts.
■ If starts are equal, it must be the highest numbered compressor.
■ Next To Unload
The next compressor to unload must meet the following requirements:
Highest capacity of the running compressors:
■ If capacities are equal, it must have the lowest sequence number of the compressors that are
running.
■ If sequence numbers are equal, it must have the most run hours.
■ If run hours are equal, it must have the least starts.
■ If starts are equal, it must be the lowest numbered compressor.
Compressor
capacity control in
ice mode
In Ice mode, running compressors shall be loaded up simultaneously at the maximum possible rate
that allows for stable operation of the individual circuits.
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