Vertiv CoolPhase CDU - Page 108

* Suction Pressure
Circuit #1 Circuit #2
* Discharge pressure
Circuit #1 Circuit #2
* Superheat
Circuit #1 Circuit #2
* Low pressure switch cut out
Circuit #1 Circuit #2
* Low pressure cut in
Circuit #1 Circuit #2
* High pressure cut out
Circuit #1 Circuit #2
* Amp draw
Pump
* Check for pump motor bearing noise.
* Verify that pump suction pressure is above 10 psi.
Suction:
* Pump amp draw
#1 L1 L2 L3
#2 L1 L2 L3
* Verify pump change over (if mulitiple pumps).
Other
1. Verify that the expansion tank air pressure is above 10 psi.
2. Verify that proper water maintenance is being performed.
3. Check for water leaks.
4. Compare the pump to nameplate amps.
5. Check for restriction temperature drop across the filter drier.
6. Check/test the water detection device(s), if equipped.
Pump Customer Fluid Loop
1. For optional main and bypass water filters, check pressure drop. If necessary, replace filter. Customer to provide
BMS monitoring for filter replacement.
2. Check strainer to determine if it needs to be cleaned.
3. Check for leaks at all connections.
Vertiv™ Liebert® MC or Vertiv™ Liebert® MCV Condenser
1. Make sure that the coil is clean of debris (clean coil if required).
2. Verify that the fans are free of debris.
3. Ensure that the fans are securely mounted.
4. Confirm that the motor bearings are in good condition.
5. Check all refrigerant lines for vibration isolation. Support as necessary.
6. Check for refrigerant leaks.
7. Check the surge protection device (if installed) status-indicator lights.
102 Proprietary and Confidential ©2024 Vertiv Group Corp. 13 Preventive Maintenance Checklist
Vertiv™ CoolPhase CDU Installer/User Guide