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Frese OPTIMA Compact Frese Application Guide

Variable Speed Chiller - Plant Room

with PICV control

Function

The variable speed chillers are connected to the controller, which controls the flow through each chiller by the PICV.

The controller measures the inlet and outlet temperatures to maximize Delta T and regulate the variable speed pump to maintain the required pump pressure.

For optimal chiller efficiency, the use of multiple chillers at lower capacity or cascade control at part load shall be selected, depending on the chiller design and control philosophy.

Benefits

Considerations