9.3 Electrical Installation Checks
1. Check that supply voltages and phase matches equipment nameplate.
2. Check that power wiring connections completed to the disconnect switch, evaporator unit, and heat rejection
equipment.
3. Check that power line circuit breakers or fuses have proper ratings for equipment installed.
4. Check that control wiring connections are completed between indoor evaporator and heat rejection equipment.
5. Ensure that all internal and external high and low voltage wiring connections are tight.
6. Confirm that unit is properly grounded to an earth ground.
7. Confirm that electrical service conforms to national and local codes.
8. Check compressors for proper rotation.
9.4 Vertiv™ Liebert® DX Piping Installation Checks
1. Check that piping is completed to the refrigerant loop.
2. Confirm that piping has been leak checked.
3. Check that additional oil has been added for system charges over 40 pounds (18.1kg) per circuit. See Additional
Oil Requirements for Scroll and Digital Scroll Compressors on page51 .
4. Check that piping is properly sized, sloped, and trapped as shown in the piping schematics.
5. Check piping inside and outside of equipment for proper support and adequate spacing to prevent rub through.
6. Ensure that factory clamps have been installed.
7. Confirm that the drain line is connected, not obstructed, and pitched per local code.
9.5 Vertiv™ Liebert® Secondary Circuit Piping Installation Checks
1. Check that piping is properly sized, sloped as shown in the piping schematics.
2. Check that piping is completed.
3. Check that air bleeders are installed at the high point in the piping circuits.
For overhead piping, install Vertiv™ CoolPhase CDU supply pipe at the highest point in the field piping and in
long horizontal runs.
For under floor piping, the CoolPhase CDU supply pipe has the highest point and can be used to help bleed air.
Also install air bleeders in the under floor piping circuit to vent trapped air from long horizontal runs.
4. Confirm that the supply line is connected, not obstructed, and pitched to the top of the unit to assist in air
venting.
5. Check piping inside and outside of equipment for proper support and adequate spacing to prevent rub through.
6. Confirm that secondary cooling circuit field piping has been leak checked.
7. Confirm that between secondary cooling circuit field piping and in-rack manifold connection the field piping has
been leak checked.
8. Confirm that all the in-rack manifold connections have been leak checked.
9. Confirm that the secondary cooling circuit has been flushed (without the customer equipment).
10. Confirm that the drain line is connected, not obstructed, and pitched per local code as needed.
11. Verify water detection is properly installed around all units (recommended).
86 Proprietary and Confidential ©2024 Vertiv Group Corp.
9 Checklist for Completed
Installation
Vertiv™ CoolPhase CDU Installer/User Guide
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