Power Switch on Air Handling Unit

C

chocony

Member
Location
Atlanta
Occupation
Electrical Designer
Hi All,
Air Handling Unit seems to have a built-in power switch. See the image. The Contractor asked if we still need to provide a disconnect. Any thoughts? I think we still do as this is switch is not a disconnect.

Thanks in advance.
 

Attachments

  • image (1).png
    image (1).png
    92.1 KB · Views: 28
LarryFine said:
If you can access it without tools, you're golden.
Click to expand...
the manufacturer offers only 100A NON-fused disconnect. The MOCP of the equipment is 35A. Is it possible to add 35A fuse to non-fused disconnect or need a separate fused disconnect? I think interior of fused and non-fused disconnects are different, so I think fused disconnect is needed?
 
chocony said:
the manufacturer offers only 100A NON-fused disconnect. The MOCP of the equipment is 35A. Is it possible to add 35A fuse to non-fused disconnect or need a separate fused disconnect? I think interior of fused and non-fused disconnects are different, so I think fused disconnect is needed?
Click to expand...
Unless the name plate specifies fuses only just supply the unit from a 35 amp circuit breaker.
 
Another question: If client wants a separate disconnect on wall in addition to the HVAC equipment factory disconnect, how does the wiring between the disconnects work?
 
chocony said:
Another question: If client wants a separate disconnect on wall in addition to the HVAC equipment factory disconnect, how does the wiring between the disconnects work?
Click to expand...
Feed it as if the built-in disconnect doesn't exist. In other words, just wire them in series.
 
You must log in or register to reply here.
Top