Attention:
v Do not set down the heat sink after you remove the plastic cover.
v Do not touch the thermal material on the bottom of the heat sink. Touching
the thermal material will contaminate it. If the thermal material on the
microprocessor or heat sink becomes contaminated, contact your service
technician.
a. Remove the plastic protective cover from the bottom of the heat sink.
b. Position the heat sink over the microprocessor. The heat sink is keyed to
assist with proper alignment.
c. Align and place the heat sink on top of the microprocessor in the retention
bracket, thermal material side down.
d. Press firmly on the heat sink.
e. Align the screws on the heat sink with the holes on the heat-sink retention
module.
f. Press firmly on the captive screws and tighten them with a screwdriver,
alternating among the screws until they are tight. If possible, each screw
should be rotated two full rotations at a time. Repeat until the screws are
tight. Do not overtighten the screws by using excessive force. If you are
using a torque wrench, tighten the screws to 8.5 Newton-meters (Nm) to 13
Nm (6.3 foot-pounds to 9.6 foot-pounds).
14. Install the optional expansion unit, if you removed one from the blade server
to replace the battery (see “Installing an optional expansion unit” on page 21
for instructions).
Thermal grease
Use this information to determine the guidelines for using thermal grease on a
heat sink and processor.
The thermal grease must be replaced whenever the heat sink has been removed
from the top of the microprocessor and is going to be reused or when debris is
found in the grease.
To replace damaged or contaminated thermal grease on the microprocessor and
heat sink, complete the following steps:
1. Place the heat-sink assembly on a clean work surface.
2. Remove the cleaning pad from its package and unfold it completely.
3. Use the cleaning pad to wipe the thermal grease from the bottom of the heat
sink.
Note: Make sure that all of the thermal grease is removed.
4. Use a clean area of the cleaning pad to wipe the thermal grease from the
microprocessor; then, dispose of the cleaning pad after all of the thermal grease
is removed.
34 BladeCenter HS23 Types 7875 and 1929: Installation and User's Guide
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