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19
MANAGEMENT OF UNITS IN PARALLEL
Function
To provide staging of units in order to adjust the temperature of the cooled fluid as closely as possible to the set
point.
Description
¶ Management of the installation by an independent CPU card (recommended configuration)
General regulation is by a KP01 independent of those which directly control the units. Dialogue between the
cards is by hard contact only, without chaining.
F Outline hydraulics diagram (case of chilled water production
F Thermostat on units
The thermostat THERG controls switching on and off of the different installation units Gn.
THERG is calculated in accordance with the following parameters:
TBAL ó Water temperature in the chamber (°C)
CONSEG ó Water instruction for regulation of units (°C)
ENCLG ó Operating differential for one unit (°C)
DIFETG ó Differential between units (°C)
Case of an installation with 4 machines :
ENCLG
DIFETG
THERG
3
2
1
0
TBAL
Pump
Buffer
chamber
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