Cleaning The Air Plenum Air-Intake Screens; Air Filter Replacement; Replacing An Air Filter - Sun Microsystems Sun Fire E25K Service Manual

18.1.2

Cleaning the Air Plenum Air-Intake Screens

1. Remove the twenty-two (22) M4x30 panhead screws from the air plenum panel to
access the honeycomb filter air-intake screen at the front or rear of the system.
2. Remove the old honeycomb filter air-intake screen from the system.
3. Clean the honeycomb filter air-intake screen.
See Section 18.1, "Cleaning the Air Plenum Panel Air-Intake Screens" on page
4. Install the clean air plenum air-intake screen and the air plenum panel.
5. Secure the air plenum panel to the system with the twenty-two (22) M4x30 screws.
6. Repeat Step 1 thorough Step 5 for the other side of the system.
18.2

Air Filter Replacement

The Sun Fire E25K/E20K systems have three front and three rear air filters, which
allow approximately 3500 CFMs per system, that require periodic cleaning or
replacing. To prevent restricted air flow and possible equipment failure, perform this
procedure when the filters contain trapped particles, or every three months.
18.2.1

Replacing an Air Filter

Caution – Be sure you are properly grounded before you begin the hardware
removal and installation. There are four ground points on the system cabinet, two at
the front top left and top right, and two at the rear top left and top right.
1. Open the Sun Fire E25K/E20K system cabinet access doors.
2. Route I/O cables away from the filter being replaced, ensuring not to disconnect
any cables from its slot 0 or slot 1 board. Do this on both the front and rear of the
chassis.
3. Remove the face plates by loosening the front panel captive thumbscrew from
both the front and rear of the three filter chambers on the power chassis.
There are three front and three rear face plates for each of the three filter chambers.
Chapter 18 Periodic Maintenance
18-2.
18-3