User Manual - CLIMATIC II - Liquid chillers / Réf. RFL-
-00
11
CONTROL OF CAPACITY REDUCTIONS FOR HOT REGULATION
Function
To adjust the hot water output temperature as closely as possible to the set point by adapting compressor
capacity.
Description
Capacity reduction valves are only available on semi-hermetic reciprocating or screw compressors.
On a machine with several compressors, only the last one started up can modify its capacity. The other
compressors are maintained at full capacity.
The number of capacity reductions to be put into operation is defined by the thermostat THERR, in accordance
with the following 2 parameters:
TSEC ó Hot water output temperature (°C)
CONSREG ó Chilled water instruction (°C)
As soon as TSEC becomes greater than CONSREG+0.5°C, capacity is reduced. As long TSEC remains above
CONSREG + 0.5°C, an additional capacity reduction cuts in (if applicable) every 2 minutes.
If at least one capacity reduction is in service, one is stopped as soon as TSEC is less than CONSREG – 1°C.
As long as the TSEC condition is satisfied, an additional capacity reduction is stopped every 2 minutes.
Note : At start-up, the compressors are maintained at reduced capacity for 1 minute.
0
1 0
1
1 0
CONSREG
CONSREG+0,5°C
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