Dear all,
We're working on a LEED v4 NC project in Mexico.
I am referring to Exceptions to 9.4.1.2b of standard ASHRAE 90.1-2010, where the automatic lighting shutoff control can be excluded if the space has a Multi Scene control system.
I reviewed the definition, and my question is, would separating the space's lighting circuits, and having independent control for them (two separate switches), count as multi-scene control?
Going for a more automated control would raise significantly the cost for the project.
Thank you!
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5924 thumbs up
April 25, 2016 - 9:50 am
I think the two switches controlling a portion of the lighting meets 9.4.1.2 without having to use any of the exceptions.
Waleed AlGhamdi
Sustainability EnablerEskew+Dumez+Ripple
20 thumbs up
July 2, 2019 - 2:56 pm
@Marcus, are you saying that if a room that would otherwise require an occupancy sensor, doesn't actually need one if the lights are controlled by two or more manual switches? In the definition of a "multi-scene control" the definition ends with "...and allows the automatic recall of those settings", which leads me to believe that a scene needs to be recalled with a "non-manual influence" (see definition of "automatic").
I know this is an old post, but I have a few conference rooms with an area light over a table and some wall washer lights on white board wall, and these two are controlled separately. My understanding is that at least the area light above the table will need to be controlled automatically with an occupancy sensor, whereas the wall washers can be on a manual switch. But your comment suggest neither lights need to be on an occ sensor.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5924 thumbs up
September 3, 2019 - 2:21 pm
No that is not what I am saying. I was just responding to the specific question posed above.