// CODE SNIPPET
A5.207.2.4.6 Variable Flow Controls
JUMP TO FULL CODE CHAPTER
Individual pumps serving variable flow systems and having a motor horsepower exceeding 5 hp shall have controls and/or devices (such as variable speed control) that will result in pump motor demand of no more than 30 percent of design wattage at 50 percent of design water flow. The pumps shall be controlled as a function of required differential pressure.
- For systems without direct digital control of individual coils reporting to the central control panel, differential pressure shall be measured at or near the most remote heat exchanger or the heat exchanger requiring the greatest differential pressure.
- For systems with direct digital control of individual coils with central control panel, the static pressure set point shall be reset based on the valve requiring the most pressure and the set- point shall be no less than 80 percent open. The pressure sensor(s) may be mounted anywhere.
Exceptions:
- Heating hot water systems.
- Condenser water systems serving only water-cooled chillers.
Related Code Sections
A5.207.2.4.6 — Voluntary Standards for Health Facilities [OSHPD 1, 2 & 4], Variable Flow Controls
Individual pumps serving variable flow systems and having a motor horsepower exceeding 5 hp shall have controls and/or devices (such as variable ...
California Green Building Standards Code 2016 > A6.1 — Voluntary Standards for Health Facilities [OSHPD 1, 2 & 4] > A5.207 [OSHPD 1, 2 & 4] HVAC Design, Equipment and Installation > A5.207.2 Space Conditioning Systems > A5.207.2.4 Hydronic System Measures > A5.207.2.4.6 Variable Flow Controls
A5.207.2.4.6 — Voluntary Standards for Health Facilities [OSHPD 1, 2 & 4], Variable Flow Controls
Individual pumps serving variable flow systems and having a motor horsepower exceeding 5 hp shall have controls and/or devices (such as variable ...
California Green Building Standards Code 2019 > A6.1 — Voluntary Standards for Health Facilities [OSHPD 1, 2 & 4] > A5.207 [OSHPD 1, 2 & 4] HVAC Design, Equipment and Installation > A5.207.2 Space Conditioning Systems > A5.207.2.4 Hydronic System Measures > A5.207.2.4.6 Variable Flow Controls
Section 120.5 Nonresidential, High-Rise Residential Hotel/Motel Occupancies, and Covered Processes — Mandatory Requirements, Required Nonresidential Mechanical System Acceptance
with NA7.5.5. Supply fan variable flow controls shall be tested in accordance with NA7.5.6. Hydronic system variable flow controls shall be tested ...
California Energy Code 2019 > 3 Nonresidential, High-Rise Residential Hotel/Motel Occupancies, and Covered Processes — Mandatory Requirements > 120.5 Required Nonresidential Mechanical System Acceptance
Section 120.5 Nonresidential, High-Rise Residential Hotel/Motel Occupancies, and Covered Processes—Mandatory Requirements, Required Nonresidential Mechanical System Acceptance
ventilation systems required by Section 120.1(c)3 shall be tested in accordance with NA7.5.5. Supply fan variable flow controls shall be tested in accordance ...
California Energy Code 2016 > 3 Nonresidential, High-Rise Residential Hotel/Motel Occupancies, and Covered Processes—Mandatory Requirements > 120.5 Required Nonresidential Mechanical System Acceptance
10-103.2 Administrative Regulations for the California Energy Commission (CEC), Nonresidential Mechanical Acceptance Test Training and Certification
NA7.5.4 Air Economizer Controls NA7.5.5 Demand Control Ventilation Systems NA 7.5.6 Supply Fan Variable Flow Controls NA7.5.7, NA7.5.9 Hydronic System ...
California Administrative Code 2019 > 10 Administrative Regulations for the California Energy Commission (CEC) > 1 Energy Building Regulations > 10-103 Permit, Certificate, Informational and Enforcement Requirements for Designers, Installers, Builders, Manufacturers and Suppliers > 10-103.2 Nonresidential Mechanical Acceptance Test Training and Certification