Carrier OPN-OPT-OL Installation And Startup Manual page 8

What is the Chilled Water System Optimizer?
Even though the controller works with a variety of chilled water system components, it must be used with parallel
chiller systems and operates best with variable speed pumps and variable speed fans.
The Chilled Water System Optimizer works with systems containing any of the following:

Single chiller or multiple chillers piped in parallel

Chilled water pumps

Cooling towers

Condenser water pumps

Variable speed air handling unit fans (w/ chilled water coils)

Chilled water side – when secondary pumps and tertiary pumps are part of the chilled water system,
including variable air handling unit fans.

Condenser water side – systems with multiple cooling towers and condenser water pumps dedicated to their
corresponding chiller, or piped in parallel.
CAUTIONS

The control program can be less effective if the setpoint response is not predictable. For example, when the
cooling towers are widely staged to come on above certain temperature thresholds, rather than using
modulating VFD fans or pumps for capacity control.

The Chilled Water System Optimizer is not designed for series arrangements or absorption chillers.
The Chilled Water System Optimizer can be applied to the following chiller system designs:

Chilled water supply side
Up to 8 chillers piped in parallel arrangement
○
 Centrifugal, scroll type, or screw type chillers
Chilled Water System Optimizer v2
Installation and Start-up Guide 4
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