6.6202.4 Operational Controls

Topic: 
Whole Building Ventilation
Subtopic: 
Components
Desired Outcome: 
Fan controls support ventilation strategy
Note: 
The authority having jurisdiction may require that a licensed professional perform certain tasks outlined in this detail.
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
6.6202.4a
Primary ventilation fan

Specifications will be field verified as appropriate to site conditions by installer

Controls will be used that can meet the following conditions:

  • Run fan continuously or intermittently, depending upon the intended schedule of operation
  • Operate fan to produce the intended flow for each intended flow setting
  • Any switch for ventilation system will be labeled

Deliver intended air exchange

Ensure fan controls meet intended ventilation strategy

6.6202.4b
Spot fan

Controls will be used that meet the following conditions:

  • Run fan continuously or intermittently, depending on the intended schedule of operation
  • Run fan for intended time for timed operation
  • Operate fan to produce the intended flow for each intended flow setting

Deliver intended air exchange

Ensure fan controls meet intended ventilation strategy

6.6202.4c
Wiring

Wiring will be installed by a properly licensed contractor

Wiring will be installed in accordance with original equipment manufacturer specifications, and local and national electrical and mechanical codes

Refer to NFPA NFPA National Fire Protection Association, www.nfpa.org 70: National Electrical Code for installation requirements.

Prevent an electrical hazard

Ensure fan controls meet intended ventilation strategy

6.6202.4d
Occupancy sensors/humidistat

Manual override will be present on all controls

Occupancy sensor and/or humidistat will be calibrated and commissioned effectively, and on a maintenance schedule

Manufacturer specifications will be followed

Allow occupant control

Ensure fan controls meet intended ventilation strategy

Maintain performance of control device

6.6202.4e
Carbon dioxide sensors (demand control)

Multispeed or variable frequency drive fan will be required

Sensors will be calibrated and commissioned effectively, and on a maintenance schedule

Manufacturer specifications will be followed

Ensure fan controls meet intended ventilation strategy

Maintain performance of control device

6.6202.4f
Occupant/property manager education

When fan controls are present and controlled by occupant, a system operation guide designed for occupants (nonprofessionals) will be provided to explain how and why to operate system

Every six months, maintenance staff will verify timer systems are in place and are operating properly

Educate occupants about system operation and importance

Deliver intended air exchange