5.3003.27 Air Flow—Mid and High Rise

Topic: 
Forced Air
Subtopic: 
System Assessment and Maintenance
Desired Outcome: 
Air flow is properly tested
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
5.3003.27a
Validate installation of air distribution system

System will be checked for existence of specified system components

Confirm installed system

Familiarize building operations staff and property manager with system components

Verify system readiness for testing

5.3003.27b
Testing equipment selection

Measurement equipment will be selected so that design value will be within the accurate range of the measuring device

Equipment will be capable of accurately measuring +/- 10% in general case

Measurement equipment will be calibrated and field checked in accordance with manufacturer recommendations

Ensure accurate measurements of airflow rates

5.3003.27c
Test main fan or air handler

Equipment testing will check for:

  • Proper operation (schedule/sequence of operation)
  • Proper rotation
  • Filter condition
  • Total flow at fan

Verify performance of air handler system

5.3003.27d
Measure air flow at terminals (commissioning)

Airflow will be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111 and adjusted to meet the design requirements

Testing/validation will be performed by certified test and balance technicians (certified by NEBB NEBB National Environmental Balancing Bureau, www.nebb.org and/or AABC or equivalent)

Verify distribution system

Identify potential adjustments

Establish baseline air flow rates

5.3003.27e
Supply wet bulb and dry bulb

Supply wet bulb and dry bulb air temperatures will be recorded

Ensure equipment operates as designed

Ensure equipment operates efficiently

Ensure equipment provides comfort

Ensure equipment operates safely

5.3003.27f
Return wet bulb and dry bulb

Return wet bulb and dry bulb air temperatures will be recorded

Ensure equipment operates as designed

Ensure equipment operates efficiently

Ensure equipment provides comfort

Ensure equipment operates safely

5.3003.27g
Thermostat wet bulb and dry bulb

Thermostat wet bulb and dry bulb air temperatures will be recorded

Ensure equipment operates as designed

Ensure equipment operates efficiently

Ensure equipment provides comfort

5.3003.27h
System adjustment

Airflow will be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111 and adjusted to meet the design requirements

Adjustments will be made to:

  • Fan speed (via sheave adjustment, replacement, and/or variable frequency drive motor replacement)
  • Dampers
  • Registers

Balance the system utilizing least resistance and energy

5.3003.27i
Final balance

Final air flow and/or pressure will be measured and confirmed at air handler and registers

Airflow will be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111 and adjusted to meet the design requirements

Provide acceptable thermal comfort, energy efficiency, and indoor air quality

5.3003.27j
Education

Occupant/property manager will be:

  • Educated on proper operation and maintenance procedures
  • Educated on value and need for recommissioning requirements

Property manager will be educated with a 30-hour OSHA OSHA U.S. Occupational Safety and Health Administration, www.osha.gov safety education course

Ensure equipment continues to operate at the design performance levels