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Rockwell Automation Publication 1512A-UM101B-EN-P - December 2021
Appendix A ArcShield Unit Information
Chimney Information
Where adequate clean height (space) is available, chimney can be provided for
each unit in place of the plenum system. It is to be field mounted on top of the
unit structure. The purpose of the chimney is to direct the hazardous flames
and gases away from the top of the resistant enclosure. The chimney is secured
to the top of each unit structure. See
for chimney installation
instructions.
Each ArcShield line-up includes a chimney exhaust section that extends
vertically directly above the enclosure.
Chimney Exhaust Considerations
1. From the outlet of the chimney, there must be a minimum distance of
1.7 m (67 in.) from the top of the chimney to the ceiling, and 1 m (39 in.) on
each side.
2. No obstructions (for example, piping) can be in the path of the exhaust
within this 1.7 m (67 in.) height requirement.
Plan the location where the chimney will exhaust.
•
There is no access to personnel while equipment is energized.
•
Area is free of flammable material or vapors.
•
Ensure that adequate space is provided around the chimney exhaust as
outlined in
