IBM Rear Door Heat eXchanger V2 Installation And Maintenance Manual page 59

2. Remove the outer hose access panel from the outside of the heat exchanger.
If the optional screw is installed, remove it. (See the following illustration).
Figure 38. Removing the outer hose access panel
3. Unscrew and retain the cap from the air-purging valve.
Note: The valve is similar to the valve on a bicycle or automobile tire.
Figure 39. Removing the cap from the air-purging valve
Optional
screw
Outer hose
access panel
Air-purging
valve
Supply manifold
coupling (Female)
Drain
valve
Return manifold
coupling (Male)
Chapter 4. Installing the heat exchanger
49