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724-746-5500 | blackbox.com
Chapter 4: Maintenance
1. While the HTD can be removed from the IT enclosure when filled with water, we recommend draining water from the HTD as
described in Section 4.2 before removing the HTD.
2. Open the Heat-Transfer Door assembly so it’s at a 90° angle from the enclosure.
3. Disconnect the return hose and the supply hose from the HTD and move them out of the way.
4. The hinge retention spring in the top hinge pocket on the HTD assembly must be depressed toward the lifting handle to allow
the HTD assembly to be lifted off the hinges. While grasping two lifting handles, use one finger to pull the spring toward the
lifting handle (Figure 4-3).
5. Gently lift up the HTD assembly, making sure the hinge retention spring clears the upper hinge. Continue to lift up the HTD
assembly until the door assembly has cleared the hinge pins and the door assembly can be physically removed.
6. We recommend storing the HTD on its back for stability.
Figure 4-3. Removing the door assembly.
