Lenovo ThinkSystem Rear Door Heat eXchanger V2 User Manual page 34

Figure 30. Installing the air-purging tool
Step 7. When there is a steady stream of liquid into the container from the air-purging tool, disconnect the
tool from the heat exchanger.
Attention: If water drips from the air-purging valve after you remove the air-purging tool, reattach
the tool and disconnect it again to seal the valve.
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ThinkSystem Rear Door Heat eXchanger V2 User Guide