Figure 5.10 Hose connections to cooling water headers
5.10 Leak Checking
Notice
Risk of leaking water. Can cause equipment damage and serious building damage.
Check the chilled water system for leaks before commissioning. Check the chilled water pipe
connection to the heat exchanger regularly. Tighten this connection if necessary.
When setting up the heat exchanger for the first time, inspect the mechanical condition of the
chilled water supply and connection thoroughly.
• Confirm that the flow directions of field-installed components are correct.
• Confirm that all isolating valves are open.
• Test the water quality when filling the system (see Water Quality on page50)
• Set the pressure at 145 psig (10 bars) maximum for at least 30 minutes or according to local
codes.
• Repair any leaks.
5.11 Filling the Unit
If using a chilled water distribution unit, such as the Knurr® CoolTrans™ or Liebert DCP™, refer to its user
manual for instructions on filling the Liebert DCD™ and starting the system.
5.11.1 Bleeding Air from Liebert DCD
The Liebert DCD has two Schrader valves, one at the top and one at the bottom. The two valves permit
rotating the Liebert DCD so that the unit may have bottom or top chilled water connections. Air trapped
in the unit or piping must be bled from the valve at the top. Opening the lower valve will release water.
NOTICE
Risk of water release. Can cause equipment and building damage.
The Schrader valve at the upper side of the Liebert DCD must be used when bleeding air from the unit.
Opening the lower Schrader valve will release water.
1. Find the Schrader valve at the top of the Liebert DCD, (see Figure 5.11 on the facing page).
Vertiv | Liebert® DCD™ User Manual | 40
To Next Page
Loading...