Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure - Manual (Page 97)

Rockwell Automation Publication 1500-UM055G-EN-P - May 2013 89
ArcShield Chimney Installation Instructions Appendix C
Cabinet Preparation
In preparation for mounting a chimney, remove 1/4-20 fasteners from the Relief
vent on the top of the MV enclosure. Leave the (4) corner fasteners in place (see
Figure 79 on page 80 ).
The chimneys are designed to fit over the fastener heads at the (4) corners of the
Relief vent. The corner fasteners are required to secure the Relief vent during
installation.
Figure 91 - Relief Vent Fasteners (top view) Figure 92 - Relief Vent
Relief vent
Relief fasteners
Corner fasteners