Installing the M320 Chassis Using a Mechanical Lift

Because of the router's size and weight—up to 439 lb (199.6 kg) depending on the configuration—we strongly recommend that you install the router using a mechanical lift.

Note: To avoid harm to yourself or the router as you install and maintain it, follow the guidelines for working with and near electrical equipment, as well as the safety procedures for working with routers. However, providing an exhaustive set of guidelines for working with electrical equipment is beyond the scope of this documentation.

1. Attaching the Installation Handle to the M320 Chassis
2. Mounting the M320 Chassis Using a Mechanical Lift
3. Removing the M320 Installation Handle and Reinstalling the Power Supplies

Attaching the Installation Handle to the M320 Chassis

To assist you with the installation of the router, attach the installation handle over the three lowest power supply slots of the chassis. To remove the corresponding power supplies and attach the handle:

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
2. Switch the circuit breaker on the power supply faceplate to the off position (O). We recommend this even though the power supplies are not connected to power sources.
3. Loosen the captive screw on each side of the power supply faceplate completely.
4. Grasp the flange on each side of the power supply faceplate, placing your hand between the flange and the chassis.
5. Pull firmly to start removing the power supply. Slide it halfway out of the chassis (see Figure 1, which shows the removal of a DC power supply).
6. Place one hand underneath the power supply to support it, and slide it completely out of the chassis.

   Caution: Each power supply weighs approximately 10 lb (4.5 kg). Be prepared to support the full weight of the power supply as you remove it from the router.

7. Repeat the procedure for the remaining power supplies.
8. Attach the installation handle by tightening the captive screws of the handle into the holes previously occupied by the captive screws of the power supplies in slots PEM1 and PEM3 (see Figure 2).

Figure 1: Removing an M320 Power Supply Before Installing the Installation Handle

Figure 2: Attaching the M320 Installation Handle

Mounting the M320 Chassis Using a Mechanical Lift

Caution: Before front-mounting the router in a rack, have a qualified technician verify that the rack is strong enough to support the router's weight and is adequately supported at the installation site.

To install the router using a lift (see Figure 3):

1. Ensure that the rack is in its permanent location and is secured to the building. Ensure that the installation site allows adequate clearance for both airflow and maintenance. For details, see M320 Clearance Requirements.
2. Load the router onto the lift, making sure it rests securely on the lift platform.

   Caution: Do not lift the router using the craft interface, installation handle, or the handles on top of the chassis. Use these handles only to help position the router.

3. Using the lift, position the router in front of the rack or cabinet, centering it in front of the mounting shelves.
4. Lift the chassis approximately 0.75 in. above the surface of the mounting shelves and position it as close as possible to the shelves.
5. Carefully slide the router onto the mounting shelves so that the bottom of the chassis and the mounting shelves overlap by approximately 2 inches.
6. With one person pulling on the installation handle from the rear of the rack or cabinet while another person pushes on the front-mounting flanges, slide the router onto the mounting shelves until the mounting brackets or front-mounting flanges contact the rack rails or spacer bars (depending on your type of installation). The shelves ensure that the holes in the mounting brackets and the front-mounting flanges of the chassis align with the holes in the rack rails.
7. Move the lift away from the rack.
8. If you are installing the router in a four-post rack or cabinet, install a mounting screw and a cage nut into each of the holes aligned with the threaded holes in the spacer bars. If you are installing the router in an open-frame rack, install a mounting screw into each of the open mounting holes aligned with the rack, starting from the bottom.
9. Visually inspect the alignment of the router. If the router is installed properly in the rack, all the mounting screws on one side of the rack should be aligned with the mounting screws on the opposite side and the router should be level.

Figure 3: Installing the M320 Router in the Rack

Note: This illustration depicts the router being installed in an open-frame rack.

Removing the M320 Installation Handle and Reinstalling the Power Supplies

After you have installed the router, remove the installation handle and reinstall the power supplies in the chassis, starting from the bottom (see Figure 4):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
2. Loosen the captive screws on the installation handle completely, and remove the handle from the chassis.
3. Switch the circuit breaker on the power supply faceplate to the off position (O).
4. Using both hands, slide the power supply into the chassis until you feel resistance.
5. Firmly push the power supply into the chassis until it comes to a stop. The power supply faceplate should be flush with any adjacent power supply faceplates.
6. Tighten the captive screws on each side of the power supply faceplate to secure the power supply in the chassis.
7. Repeat the procedure for the remaining power supplies.

Figure 4: Reinstalling an M320 Power Supply