NEC Express5800/120Rh-2 N8100-1126F - Manual (Page 329)

Upgrading Your Server 9-55
Redundant Hot Swap-fan
Your server can include four optional redundant hot-swap fans.
Installation
1. See the section "Preparing for Installation and Removal" described earlier to prepare.
2. Pull out the server from the rack.
3. Open the drive cover.
4. Locate the installation slot.
5. Insert the hot-swap fan into the slot with its labeled side facing rear of the server until it
locks.
Redundant hot-swap fan slot
FRONT REAR