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New OPTI-VISORTM CHILLER PLANT Control Solution From Armstrong Drives An Additional 15-30% Energy SavingsSubscribe to RSS feed

Armstrong Fluid Technology has launched a new control solution that improves the energy efficiency of chiller plants.


Interfacing seamlessly with an existing building or chiller plant automation system, the Armstrong OPTI-VISORTM
controls the key components of a chiller plant, providing the optimal
operating settings for equipment such as water-cooled variable speed
chillers, variable flow cooling towers and variable speed pumps on the
chilled water and tower water circuits.


controlling the chiller plant settings to maximize system-wide
efficiency, OPTI-VISOR will generate valuable energy savings - even when
applied to recently installed equipment. Armstrong Fluid Technology
estimates that an energy savings of 15%-30% can be expected from a
typical installation on an existing all-variable speed chiller plant.


OPTI-VISOR is a relational control solution for the operation of an
all-variable-speed chiller plant. OPTI-VISOR is an excellent solution
for retrofit in buildings with water cooled chiller plants, including
those less than five years old, but is also suitable for new
construction applications involving variable-primary flow chiller plants
that have advanced building automation systems (BAS).


connects to the BAS/BMS using industry-standard serial communication
protocols, and gathers data on building load and plant conditions from
the BMS data. Using patented Design Envelope Integrated Plant Control
methods, OPTI-VISOR determines optimal device settings for maximum total
plant energy efficiency. The OPTI-VISOR then sends control instructions
to the BMS with the control settings for the plant equipment, such as
fan speeds, pump speeds, chilled water set points, and the combination
of equipment to operate.


majority of chiller plants use technology developed during the analog
era, and operate using independent control loops with PID feedback
control. In contrast, OPTI-VISOR is a digital era technology that
operates the plant as one integrated solution. This digital, system-wide
approach enables faster response, better stability, the optimization of
thermodynamic effects at the equipment level, and reduced cycling
stress on system components. Compared to typical BMS offerings, the
OPTI-VISOR provides more in-depth analysis and tuning of chiller plant
operations. It also monitors and adjusts component operation to adjust
for changes as individual components age.


OPTI-VISOR offers a web-based user interface, and local touch screen
user interface with menus for easy assessment key performance and
systems indicators including:

  • BMS/BAS compliance

  • Plant performance (YTD, 30 day, actual)

  • Plant status

  • BMS communication

  • Chilled water plant schematic with equipment status

  • Plant operating load (capacity and kW)

  • 30-day plant performance trend charts (efficiency, load, and chiller efficiency)

  • Alarm history screen

  • Default screen showing; plant efficiency, plant efficiency chart, CHWST, ECWT

  • Component efficiency levels (pumps, fans)

offers ‘plug and play installation’, requiring only minor modification
to the existing BAS plant automation module to ensure that the BAS
recognizes the control signals from the OPTI-VISOR and will make
available the input data points necessary.


In July 2013, Armstrong Fluid Technology announced the launch of ECO*PULSETM
HVAC Health Management Service. ECO*PULSE combines industry leading
diagnostic technology with expert review to help keep central cooling
systems operating at optimal performance, and is offered as a
subscription-based service to complement Armstrong’s Integrated Plant
Controller and OPTI-VISOR products.


will provide building owners and operators with timely and concise
insight and recommendations to keep their cooling system running at an
optimal level. Customers will benefit from the insights into trends and
anomalies with practical recommendations on how to optimize their
cooling system. Even efficient systems can easily lose 5% efficiency or
more without on-going attention to detail.


shipments of IPC and OPTI-VISOR from Armstrong will be configured with
the ECO*PULSE technology enabled and a one-year subscription to the
ECO*PULSE service will be included in the initial purchase.


About Armstrong Fluid Technology

more than 1000 employees worldwide, operating seven manufacturing
facilities on three continents, Armstrong Fluid Technology is known
around the world as a leader and innovator in design, engineering and
manufacturing of integrated solutions within the building oriented
fluid-flow equipment industry. Armstrong products are internationally
recognized for design innovation, quality, long service life, and
superior operating economy. For more information about Armstrong Fluid
Technology visit