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ASHRAE-90.1-2022- - Page 158

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shall not turn the lighting on for more than two hours per activation during scheduled off periods and shall not control more than 5000 ft [2] . Exceptions to 9.4.1.1(i): The following lighting is not required to be on scheduled shutoff:

  1. Lighting required for 24/7 continuous operation.
  2. Lighting in spaces where patient care is rendered.
  3. General lighting and task lighting in spaces where automatic shutoff would endanger the safety or security of the room or building occupants.
  4. Lighting load not exceeding 0.02 W/ft [2] multiplied by the gross lighted floor area of the building . j. Scheduled OFF during nonbusiness hours : Lighting shall be scheduled to provide automatic OFF control so that lights are turned off at the end of business hours, using either (1) a time-of-day operated control device that automatically turns the lighting off at specific programmed times or (2) a signal from another automatic control device or alarm/security system . Any manual control installed to provide override of the scheduled control shall not turn the lighting on for more than two hours per activation during scheduled off periods.

9.4.1.2 Parking Garage Lighting Control. Lighting for parking garages shall comply with the following requirements:

a. Parking garage lighting shall have automatic lighting shutoff per Section 9.4.1.1(i). b. Lighting power of each luminaire shall be automatically reduced by a minimum of 50% when there is no

activity detected within a lighting zone for 10 minutes. Lighting zones for this requirement shall be no larger than 3600 ft [2] . c. Parking garage daylight transition zone lighting shall be separately controlled to automatically reduce

the lighting to no more than the general light level from sunset to sunrise. d. The power to any luminaire within 20 ft of perimeter wall openings totaling at least 24 ft [2] shall be auto-

matically reduced through continuous dimming in response to available daylight. Exceptions to 9.4.1.2(d):

  1. Parking garage daylight transition zone lighting.
  2. Where permanent screens or architectural elements obstruct more than 50% of the opening.
  3. Where the top of any existing adjacent structure or natural object is at least twice as high above the openings as its horizontal distance from the opening.

9.4.1.3 Special Applications. Lighting controls noted in this section are the only required controls for this equipment and these applications. Lighting exempt from interior lighting power shall be controlled in accordance with Table 9.2.2.1. Lighting using additional interior lighting power applications shall be controlled in accordance with Section 9.5.2.2.

a. Lighting used for the following applications shall be equipped with a local control independent of the

control of the general lighting in accordance with Section 9.4.1.1(a). In addition, such lighting shall be controlled in accordance with Section 9.4.1.1(h) or Section 9.4.1.1(i).

  1. Display or accent lighting

  2. Lighting in display cases b. Guestrooms

  3. All lighting and switched receptacles in guestrooms and suites in hotels, motels, boarding houses, or similar buildings shall be automatically controlled such that the power to the lighting and switched receptacles in each enclosed space will be turned off within 20 minutes after all occupants leave that space . Card key controls shall not be used to comply with this provision.

  4. Bathrooms shall have a separate control device installed to automatically turn off the bathroom lighting within 30 minutes after all occupants have left the bathroom. Exception to 9.4.1.3(b)(2): Night lighting of up to 5 W per bathroom is exempt. c. Supplemental task lighting, including permanently installed undershelf or undercabinet lighting, shall be

controlled from either

  1. a control device integral to the luminaires or
  2. a local control independent of the control of the general lighting in accordance with Section 9.4.1.1(a).

In addition, such lighting shall be controlled in accordance with Section 9.4.1.1(h) or Section 9.4.1.1(i).

156 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)

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