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// CODE SNIPPET

E 503.5.8.1 Fan Speed Control

2018 Uniform Mechanical Code of Nevada > E Sustainable Practices > E 503.0 Heating, Ventilation, and Air-Conditioning — Other Than Low-Rise Residential Buildings > E 503.5 Prescriptive Path, Economizers > E 503.5.8 Heat Rejection Equipment > E 503.5.8.1 Fan Speed Control
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The fan system on a heat-rejection device powered by an individual motor or an array of motors with a connected power, including the motor service factor, totaling 5 hp (3.7 kW) or more shall have controls and/or devices (such as variable-speed control) that shall result in fan motor demand of no more than 30 percent of design wattage at 50 percent of the design airflow and that shall automatically change the fan speed to control the leaving fluid temperature or condensing temperature or pressure of the heat rejection device.

Exceptions:

  1. Condenser fans serving multiple refrigerant circuits or fluid cooling circuits.
  2. Condenser fans serving flooded condensers. [ASHRAE 90.1:6.5.5.2.1]

Related Code Sections


6.5.5.2 Heating, Ventilating, and Air Conditioning, Fan Speed Control
factor, totaling 5 hp or more shall have controls and/or devices (such as variable-speed control ) that shall result in fan motor demand ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Nevada > 6 Heating, Ventilating, and Air Conditioning > 6.5 Prescriptive Path > 6.5.5 Heat-Rejection Equipment > 6.5.5.2 Fan Speed Control
C403.9.1 [CE] Commercial Energy Efficiency, Fan Speed Control
) or more shall have controls and devices configured to automatically modulate the fan speed to control the leaving fluid temperature or condensing ...
Energy Conservation Code 2018 of Nevada > 4 [CE] Commercial Energy Efficiency > C403 Building Mechanical Systems > C403.9 Heat Rejection Equipment > C403.9.1 Fan Speed Control
E 503.5.8.1 Sustainable Practices, Fan Speed Control
factor, totaling 5 hp (3.7 kW) or more shall have controls and/or devices (such as variable-speed control) that shall result in fan motor demand ...
2018 Uniform Mechanical Code of Nevada > E Sustainable Practices > E 503.0 Heating, Ventilation, and Air-Conditioning — Other Than Low-Rise Residential Buildings > E 503.5 Prescriptive Path, Economizers > E 503.5.8 Heat Rejection Equipment > E 503.5.8.1 Fan Speed Control
C403.4.4 [CE] Commercial Energy Efficiency, Heat Rejection Equipment Fan Speed Control
have controls that automatically change the fan speed to control the leaving fluid temperature or condensing temperature/pressure of the heat ...
Energy Conservation Code 2012 of Nevada > 4 [CE] Commercial Energy Efficiency > C403 Building Mechanical Systems > C403.4 Complex HVAC Systems and Equipment. (Prescriptive) > C403.4.4 Heat Rejection Equipment Fan Speed Control
6.1.1.3.1 Heating, Ventilating, and Air Conditioning,
, " Boiler Turndown" 6.5.4.3, "Chiller and Boiler Isolation" 6.5.5.2, "Fan Speed Control " ...
Energy Standard for Buildings Except Low-Rise Residential Buildings 2016 of Nevada > 6 Heating, Ventilating, and Air Conditioning > 6.1 General > 6.1.1 Scope > 6.1.1.3 Alterations to Heating, Ventilating, Air Conditioning, and Refrigeration in Existing Buildings > 6.1.1.3.1
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