System Startup and Commissioning
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4 System Startup and Commissioning
This chapter introduces the system startup and commissioning, including the specific operation steps for startup and
commissioning the unit.
4.1. Startup and Commissioning
4.1.1. Preparation Before Commissioning
• Mechanical Part
1. According to the instruction label at the valve, ensure that all valves of the main unit and Liebert® XDH
terminals are open.
2. The refrigerant piping system has passed the air tightness test and confirmed that there is no leakage.
3. Ensure that the total charge of the system has been roughly calculated.
4. The condensate drain piping system has been reliably connected and check if there is any sign of leakage.
5. The temperature of the equipment room is above 18 °C and has a certain thermal load. If not available, other heating
devices should be used to preheat the environment of the equipment room to ensure the necessary thermal load for the
commissioning.
• Electrical Parts
6. Confirm that the input voltage of the main power supply is within ±10% of the nominal range of rated voltage and the
power isolation switch of the outdoor unit air-cooled condenser is closed.
7. Confirm that all electrical or control connections are correct, and firmly fixed all electrical and control connections.
8. Confirm that the power supply cables and low-voltage control cables are arranged separately.
9. Confirm that the high water level cable has been connected correctly.
10. Confirm that the ground cabling/wiring of the unit is reliably connected.
4.1.2. Commissioning Procedures
Since the Vertiv
™
Liebert® XDC main unit and Vertiv
™
Liebert® Liebert® XDO terminals are connected as a system and
are used together, the main unit and terminal adopt the same commissioning method. Refer to the related contents of the
startup and commissioning in the “Vertiv
™
Liebert® XDC multi-connected air conditioner main unit User Manual”.
4.2. Commissioning Inspection Checklist
After debugging, check and confirm according to
.
Table 4-1 Commissioning Inspection Checklist
Inspection Items
Results
All output functions are automatic
The temperature and humidity settings and control accuracy are correct
Whether there is any abnormal alarm
Other settings are correct
