Variable Frequency Drives and Electrically Commutated Motors

Detail ID 6.0101.6
Topic
Infrastructure
Subtopic
Components
Desired Outcome

Improve fan efficiency and control systems

SF Single Family Site-Built Housing
MH Manufactured Housing
MF Multifamily Housing

Specifications

  • MF
Specification Objective

Evaluate motors for compatibility with variable frequency drive (VFD)

Analyze load profile and source equipment for use of VFD to provide variable ventilation rates

Ensure existing system is compatible with VFD use

  • MF
Specification Objective

Replace motor and/or starter per the manufacturer's specifications and in compliance with applicable codes

Ensure that VFD or ECM installed safely and effectively

  • MF
Specification Objective

If using a sensor-controlled strategy, install feedback sensors in accordance with manufacturer specifications at locations that will optimize the chosen control strategy

Optimize VFD or ECM operation

  • MF
Specification Objective

Install manual controls in accordance with manufacturer specifications at a location easy to access for continued operation

Safe and effective manual operation

  • MF
Specification Objective

Set VFD and/or ECM parameters to accept feedback from sensors dependent upon chosen control strategy

Optimize system to meet design ventilation rates at the lowest possible speed setting.

Minimal fan speed for ventilation rate

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