The last mile for any project is always the most difficult and expensive. This certainly holds true for designing and building commercial buildings and their mechanical systems. For a chilled water system the last mile is balancing. Grundfos Distributed Pumping is the next generation of chilled water system design: Variable Primary / Distributed Secondary. This revolutionary, yet simple system design consists of a chiller and pumps in a variable primary configuration, connected to a distributed secondary via a 4-temperature bypass. Intelligent pumps are installed at each load in the system and not only provide precise flow and pressure directly to each load, they are auto-balanced upon installation and throughout the chilled water system’s life cycle. Simplifying installation, maximizing occupant comfort, saving pump energy and significantly impacting the chiller plant’s Delta T.
● Evaluate the evolution of chilled water piping layouts
● Define a distributed Pumping concept
● Recognize designing and sizing a distributed pumping system
● Develop a pressure profile of comparison to a conventional system
An independent Testing and Balancing Agency certified by the AABC shall be engaged to Test and Balance the HVAC systems. Systems shall be balanced to plus/minus 10% of design requirements. The contractor shall place all systems and equipment into full operation for Testing and Balancing. One copy of the final Test and Balance report with the AABC National Performance Guaranty shall be sent directly to the engineer of record. Provide five (5) additional copies to the contractor.
AIA-Format LONG-FORM SPECIFICATION
Section 230593 – TESTING, ADJUSTING AND BALANCING FOR HVAC
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