Do you provide commissioning or testing on tall buildings, or any multi-story building in a cold place? If so you should be aware of how these conditions affect static pressure measurements. The author of an ASHRAE Journal article on the subject leads this session to explain the effects of cold weather (temperature change) on building static pressure measurement when the indoor and outdoor references at two different elevations. If not addressed, this effect has the potential of over a 100% reading error.
Why does control of building static pressure matter
Calculation of zero setting error with changes in temperature
Methods to reduce weather related sensing errors
Verification of sensor and sensor reference tubing as part of the commissioning process
Evergreen Telemetry manufactures a brand-new type of instrument, a 5-in-1 meter for balancing, commissioning, and troubleshooting in commercial buildings. The patented Wrist ReporterTM displays real-time results from as many as ten wireless sensors, including air & water pressure/velocity/flow/temperature/humidity. Applications include duct traverse, flow damper setting, ventilation calculations, room-to-room pressure hierarchies, coil performance testing, and wireless datalogging. This high-productivity instrument makes TAB and Cx Faster, Easier, and Safer.
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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