8.1 OHLD Installation
The OHLD device is shipped separately and must be attached to the lineup once the lineup is installed. Follow the below
guidelines to help with the installation of the OHLD.
1. Remove the OHLD and rails from the shipment and unpackage them.
Figure 8.3 Packaged OHLD Accessories
2. Remove the bolts from the front cover and the front row of the second cover. These hole locations are used to
mount the OHLD rails onto the lineup.
Figure 8.4 Bolt Removal
3. Mount the front and rear rail onto the top of the unit using the supplied hardware.
NOTE: Countersunk M8 bolts are used to fix the front rail, to allow for the OHLD to glide across.
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Vertiv™ UL891 Switchboard Installer/User Guide