Juniper CBL-M40-PWR-AU Manuel D’Utilisation
Maintain and Replace Cooling System Components
Replace the Upper Impeller Assembly
159
Install the Lower Impeller Assembly
The lower impeller assembly is located behind the craft interface at the front the chassis (see
Figure 1). To install it, follow this procedure (see Figure 72):
Figure 1). To install it, follow this procedure (see Figure 72):
1.
Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on
the chassis.
the chassis.
2.
Grasp the sides of the assembly, and align the rear with the slide guides in the chassis.
3.
Slide the assembly all the way into the chassis until it contacts the backplane.
4.
Using a Phillips screwdriver, tighten the three captive screws at the bottom edge of the
assembly to seat it firmly in the chassis.
assembly to seat it firmly in the chassis.
5.
Install the air filter as described in “Install the Air Filter” on page 155.
Figure 72: Install the Lower Impeller Assembly
Replace the Upper Impeller Assembly
The upper impeller assembly is located at the top rear of the chassis, above the fan tray (see
Figure 2), and works together with the lower assembly to cool the Packet Forwarding Engine
components. It is hot-removable and hot-insertable.
Figure 2), and works together with the lower assembly to cool the Packet Forwarding Engine
components. It is hot-removable and hot-insertable.
To replace the upper impeller assembly, perform the following procedures:
Remove the Upper Impeller Assembly
The upper impeller assembly is located at the top rear of the chassis, above the fan tray (see
Figure 2). It weighs approximately 10 lb (4 kg).
Figure 2). It weighs approximately 10 lb (4 kg).
1.
Attach an ESD strap to your bare wrist and connect the strap to one of the ESD points on
the chassis.
the chassis.
2.
Unscrew the captive screws at the bottom corners of the assembly, using a Phillips
screwdriver if necessary.
screwdriver if necessary.
1062
Screws