Rotatune piston (for internal use only)
This picture shows the interaction between frequency converted speed and capacity stage
load/unload.
Separator velocity (screws)
Max. sep. cap. load is the calculated value in % for the maximum true capacity load allowed
at current running conditions. When this value is between 100 and 102% the capacity inhibit
function is activated. When the value is below 100% the capacity force unload is activated.
Max. cap. slide pos. is the calculated value in % for the maximum mechanical capacity load
allowed at current running conditions. This value which will be between 0% and 100% is the
limiting value used when the capacity force unload function is active.
Pressure Ratio is the calculated pressure ratio = P
disch
/P
suct
.
K. Factor is the refrigerant constant, κ (Kappa).
System Compr. Ratio is the calculated system compression ratio.
Syst. Sep. Vel. Ratio is the calculated system separator velocity ratio.
Utilisation Number is the calculated utilisation ratio for the separator at current running
conditions. Eg a value of 1.00 means that the separator is fully loaded and that the capacity-
inhibit function is activated.
For more information, see subsection 3.2.3. Special limiters.
Service
Engineering manual - Unisab III 1.10
001930 en 2014.09
161/319
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