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SLS/SLH 10/06
5
COMPRESSORS RETURN LIQUID
CONTROL (COOLING MODE)
If Return Control Mode is selected, the return water tem-
perature RWT is controlled between the Setpoint and
the Se Proportional Band. We call this zone: the
Loading Zone.
All stages, are placed in the proportional band, divid-
ing it in the number of the stages.
If the RWT is above the Sepoint, control starts to load
each stages. The higher is the RWT, the more stages
will be loaded, according to the compressor activity
logic, timer and rules described.
For each stages will be respected the minimum time ON the minimum time OFF and loading time.
Charge sequenzer:
compressore 1 25%
compressore 1 50%
compressore 2 25%
compressore 2 50%
compressore 1 75%
compressore 2 75%
compressore 1 100%
compressore 2 100%
6
COMPRESSORS RETURN LIQUID
CONTROL (HEATING MODE)
The compressors are loaded in the same proportional
way used in Return Control in Cooling.
The difference is that the loading zone is between Set
Point – Proportional Band and Set Point.
Summary of Contents for SLS-SLH
Page 1: ...Chiller unit SLS SLH...
