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Re: AHU disconnect
The thermostat is not considered a disconnect.
Here is what most electricians think their options are:
a) Look at the equipment and see if there is a disconnect mounted in the equipment (by the manufacturer, which means it would - should - meet the requirements for 'unit switches' as the AHU would be listed and labeled).
b) Install a disconnect near the AHU, such as 'in the AHU closet'.
c) Install a lock out device at the breaker, which will now serve as the disconnect and they can 'lock it out'.
d) Any of the above.
a) and b) are correct options, c) is not, making d) wrong.
(Sorry for not making the above letters the same choices as on my other post, but that would have just complicated this post, which is trying to uncomplicate it.)
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