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Chapter 7. IAQ Testing, Adjusting, and Balancing. Testing, Adjusting, and Balancing of Air-Handling Systems • Air-Handling System Duct Measurements • Air-Handling System Test Instruments • Outdoor Air Quantities . Chapter 7. IAQ Testing, Adjusting, and Balancing.

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chapter 7

Chapter 7

IAQ Testing, Adjusting, and Balancing

Testing, Adjusting, and Balancing of Air-Handling Systems • Air-Handling System Duct Measurements • Air-Handling System Test Instruments • Outdoor Air Quantities

chapter 72

Chapter 7

IAQ Testing, Adjusting, and Balancing

Testing, Adjusting, and Balancing of Air-Handling Systems • Air-Handling System Duct Measurements • Air-Handling System Test Instruments • Outdoor Air Quantities

slide4
Test instruments can measure various aspects of air-handling systems including air temperature, humidity, and airflow rate.
slide6
Measurement readings often undergo unit conversions. Some instruments can perform conversions electronically.
slide7
When beginning the TAB process, the HVAC system design should be checked to ensure it is compatible with the building configuration.
slide8
A detailed equipment check is performed after confirming that all components of an air-handling system are installed to design specifications.
slide11
Duct diameter is the distance from side-to-side across the middle of a rectangular or round duct.
slide13
Traversing a round duct requires dividing the duct into circles, each containing an equal area.
slide14
Inclined-tube manometers are mainly used in applications where the manometer is permanently attached.
slide15
Inclined-tube manometer procedures for measuring the pressure differential in a duct include several steps.
slide16
Digital manometers are portable test instruments used to measure pressure and pressure differential in air systems.
slide19
The proper procedure must be followed when using a thermo-anemometer to measure air velocity.
slide23
Deflecting-vane anemometers are used because of their portability, direct readings, and ease of use.
slide30
A velometer provides direct cubic feet per minute readings, while anemometers and pitot tubes require a stationary engineer to convert readings into cubic feet per minute.
slide31
One technique for determining outdoor air quantities involves traversing the outside air duct.
slide32
Calculating the outdoor air percentage of a facility can be done if the outdoor-air, mixed-air, and return-air temperatures are known.
slide34
Connecting a capture hood (capture hood has reverse flow switch) to a return-air grill can be done to measure airflow in a reverse manner.
slide38
Motor current and voltage measurements of a fan are necessary to ensure the fan is operating properly.