4. Turn on the water fill source. Allow it to run until all of the air is purged from the hose connected to the high point
vents. Failure to properly purge the air will result in pump cavitation and premature pump failure.
NOTE: CoolPhase CDU controls will cause the unit to stop operation if enough air remains in the piping. This will show
up as a "Loss of Flow" warning.
Figure 7.3 Drain/Fill Valve Location
Item Description Connection Size
CWD1 Chilled Water Drain
5/8" (16mm)
CWD2 Chilled Water Drain Fill Connection
5. Close air vents when purged or return auto air vents to specified position (open/closed) according to field piping
design. Allow water fill pressures to stabilize. The unit fill volume is listed in Table 7.3 on page68 .
6. With the unit in manual mode, turn pump(s) on for a few seconds at a time initially, resting for a minute or so
between cycles, to get trapped air to move to the high points. Add additional fluids while pump is running as
needed to get a stagnant pressure of 20 psig.
7 Secondary Fluid Circuit
Requirements
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Vertiv™ CoolPhase CDU Installer/User Guide
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