Chapter 8

1. Chapter 8 Hydronic System Balancing and Building Commissioning Testing, Adjusting, and Balancing of Chilled and Hot Water Hydronic Systems • Commissioning of Commercial Buildings’ HVAC Systems

2. Chapter 8 Hydronic System Balancing and Building Commissioning Testing, Adjusting, and Balancing of Chilled and Hot Water Hydronic Systems • Commissioning of Commercial Buildings’ HVAC Systems

3. Circulation pump testing is required when a new system is installed.

4. Variable-frequency drives need to be tested and adjusted to fit the correct operating requirements.

5. Electronic tachometers measure the speed of a moving object.

6. The speed of a rotating shaft can be measured by an electronic tachometer.

7. Digital multimeters record measurements of electrical properties.

8. Digital multimeters are relatively easy to use to measure the line voltage of an variable-frequency drive.

9. Clamp-on ammeters measure current in a circuit.

10. The procedure for using clamp-on ammeters to measure current involves several steps.

11. Hydronic manometers measure water pressure to help balance a hydronic system.

12. Hydronic manometer procedures are used to check pump performance and verify terminal flow.

13. Mechanical gauges measure pressure and are available in a variety of ranges.

14. Flow-balancing valves often have a manual valve with an indicator to show how much the valve is open.

15. The flow rate through balancing valves can be determined using charts and graphs.

16. If the gallons per minute of flow and the temperature differential of the water in a coil are known, the amount of British thermal units removed can be determined.

17. The water flow rate through a valve can be determined if the flow coefficient and pressure drop are known.

18. While building commissioning can be expensive, often the cost is less than 1% of the total construction costs.