(Optional) Installing U-shaped Brackets and Adjustable Guide Rails

Prerequisites

The following installation tools and materials are ready:

• Phillips screwdriver (M3 to M6)
• Marker
• M6 screws
• Square-hole positioning pins (for square-hole mounting bars)
• Round-hole positioning pins (for round-hole mounting bars)
• U-shaped brackets

Precautions

• Storage devices must be installed on adjustable guide rails. Stacking devices may damage them.
• The adjustable guide rails must be installed horizontally.

To ensure that an adjustable guide rail can be installed horizontally, it is recommended that you mark both front and rear columns where the adjustable guide rail is to be secured before installation.

Context

A U-shaped bracket is a mechanical part installed between the mounting ear of the enclosure and mounting bar of the cabinet to adjust the relative position between the enclosure and the cabinet.

U-shaped brackets are classified into three types: 25 mm, 50 mm, and 75 mm, as shown in Figure 5-19, Figure 5-20, and Figure 5-21.

Figure 5-19 25 mm U-shaped bracket

Figure 5-20 50 mm U-shaped bracket

Figure 5-21 75 mm U-shaped bracket

• If U-shaped brackets are not installed, the system enclosure is fixed to the front mounting bar by using captive screws. The distance between the front panel of the system enclosure and the inner side of the front door is fixed.
• Install the U-shaped brackets on the front mounting bars, and then secure the system enclosure to U-shaped brackets of the respective size. This allows you to adjust the distance between the front panel of the system enclosure and the inner side of the front door within a certain range.

• If possible, start the installation from the bottom-most allowed space in your cabinet.
• A pair of adjustable guide rails must be installed for each storage device.
• The adjustable guide rails can be extended from 600 mm to 900 mm.
• The square-hole positioning pins have been installed on the adjustable guide rails before delivery. If the installation holes for the screws are round, change the square-hole positioning pins to round-hole positioning pins before installing the adjustable guide rails.

You can find round-hole positioning pins in the accessory bag delivered with the devices.

The following is a recommended method for installing adjustable guide rails (using square-hole positioning pins as an example).

Procedure

1. On the front of the cabinet, align the bottom edge of the adjustable guide rail with the U scale on the front mounting bar, and fully insert the front positioning pin into the square hole.
2. Extend the adjustable guide rail and insert the rear positioning pins into the square holes on the rear mounting bar.
3. Align the U-shaped brackets with the adjustable guide rails, and then use M6 screws to secure the U-shaped brackets and the adjustable guide rails, as shown in Figure 5-22.
   Figure 5-22 Securing the U-shaped brackets and adjustable guide rails
   

4. (Optional) Install floating nuts on the U-shaped brackets. For details, see (Optional) Installing Floating Nuts.

   Floating nuts have been installed on U-shaped brackets before delivery. If no floating nuts have been installed, install a floating nut into the third hole on each U-shaped bracket.

Follow-up Procedure

• After the U-shaped brackets are fixed to the front mounting bar and the floating nuts are installed, install the storage device onto the U-shaped brackets, as shown in Figure 5-23, Figure 5-24, Figure 5-25, and Figure 5-26.
  Figure 5-23 Left U-shaped bracket and adjustable guide rail
  
  Figure 5-24 Right U-shaped bracket and adjustable guide rail
  
  Figure 5-25 Securing the storage device onto the left U-shaped bracket
  
  Figure 5-26 Securing the storage device onto the right U-shaped bracket
  

• U-shaped brackets can be stacked. When stacking the U-shaped brackets, comply with the following rules:
  • Stack two U-shaped brackets at most on each side.
  • Install the wide U-shaped bracket onto the adjustable guide rail and stack the other on it.
  • Install floating nuts in the first and fifth holes to connect two U-shaped brackets.
  Figure 5-27 and Figure 5-28 show how to stack two U-shaped brackets.

  Figure 5-27 Stacking two U-shaped brackets on the left adjustable guide rail
  
  Figure 5-28 Stacking two U-shaped brackets on the right adjustable guide rail