6.6202.8 Replacement of Conventional Fans with Electrically Commutated Motor-Driven Fans

Topic: 
Whole Building Ventilation
Subtopic: 
Components
For supporting material, see Building America Solution Center.
Desired Outcome: 
Improved fan efficiency and control
TitleSpecification(s)Objective(s)
6.6202.8a
Evaluate existing fans, motors, and ventilation system

Control strategy will be determined (e.g., manually adjusted motor-mounted speed control, manually adjusted remote speed control, static pressure sensor control)

Ensure existing ventilation system is compatible with electrically commutated motor (ECM) operation

6.6202.8b
Check for presence of asbestos-containing materials (ACMs)

Potential ACMs will be handled in accordance with SWS 2.0110.2 Potential Asbestos-Containing Materials

Ensure safe work environment

6.6202.8c
Remove and replace existing fan with ECM fan

Existing fan will be removed and replaced with ECM fan, installed in accordance with manufacturer specifications

Ensure proper operation of ECM fan

6.6202.8d
Install required sensors to implement ECM control strategy (for sensor controlled strategies)

Feedback sensors will be installed in accordance with manufacturer specifications at locations that will optimize chosen control strategy

Feedback sensors will be wired to ECM in accordance with manufacturer specifications

Ensure sensors are installed to optimize ECM operation

6.6202.8e
Install required manual controls to implement ECM control strategy (for sensor and/or manual controlled strategies)

Speed controls will be installed in accordance with manufacturer specifications at a location optimized for ease of continued operation

Ensure manual controls are installed to optimize ECM operation, and for ease of installer and continuous operation

6.6202.8f
Restore power supply to variable frequency drive, and verify operation of ECM and fan

Power supply will be restored

ECM will be shown to be capable of operating the fan

ECM will be shown to be capable of receiving sensor signals, when applicable

Ensure that ECM is ready for setup

6.6202.8g
Initial setup of ECM

ECM parameters will be set up to accept feedback from sensors dependent upon chosen control strategy

System will be optimized to ensure targeted design ventilation rates at the lowest possible speed setting

Achieve targeted design ventilation requirements with reduced electrical energy use