Vertiv Liebert XDU 060, Installer/User Manual

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Figure 6.2 Components of Cooling Water Circuit
Item Description
1 Heat load
2 XDU
3 Ball valve
4 Water drain tap (high point vent on bottom connected units)
5 Tubing support
6.4 Leak Check before Commission and Operation
NOTICE
Risk of leaking fluid. Can cause equipment damage and serious building damage. Check the cooling fluid
system for leaks before commissioning. Check the fluid pipe connection to the heat exchanger for the first time,
inspect the mechanical condition of the cooling fluid circuit and connections thoroughly.
To check for leaks:
1. Confirm that the flow directions of field installed components are correct.
2. Confirm that all isolating valves are open.
3. The fluid systems in the Liebert® XDU is factory checked for leaks and may be shipped with an inert gas
holding charge. At installation, check all fluid circuits for leaks.
4. Repair any leaks.
NOTE: We recommend isolating the unit with field installed shut-off valves during leak checking of field installed
piping. When the units are included in a leak test, use of fluid for pressure testing is recommended. When
pressurized gas is used for leak testing the unit, the maximum recommended pressure is 30 psig (207 kPa) and
tightness of the unit would be verified by pressure decay over time (<2 psig/hour [13.8 kPa/hour]) or sensing a tracer
gas with suitable instrumentation. Dry seals in fluid valves and pumps may not hold a high gas pressure.
6 Piping Requirements
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