Vertiv | Liebert® DM | User Manual 63
Start-up Commissioning
Chapter 4: Start-up Commissioning
This chapter introduces the start-up inspection and function testing of the Liebert® DM air conditioning units.
4.1. Start-Up Inspection
Before commissioning the unit, inspect the status of components of the unit. Refer Table 4-1 for the list of inspection
requirements.
Table 4-1 Component Inspection Checklist before Commissioning
Components Inspection Requirements
Panel
• Check if there is any damage to the top, bottom, side, front & rear panels of the unit.
• Check if the panels are well insulated and clean.
Filter
• Check if there is any damage to the filter, and clogging.
• Check if the filter is reliably fixed.
Power supply
• Measure and record the voltage before the system is powered on.
• Check if the power cables are firmly connected.
Outdoor unit
• Check if the outdoor unit is installed properly, the piping are rigidly supported and
pipings are sloped down properly.
• Check the trap is installed at an appropriate location.
Fan • Check if there is any obstacle at inlet and outlet areas of the fan.
Humidifier (if applicable)
• Check if the water supply pipe and drain pipe are firmly connected.
• Check if the water level sensor is functioning correctly.
Electrical Heater (if applicable) • Check if the heating components are secured reliably.
Power SPD (if applicable) • Check if the power SPD module is secured reliably.
Microprocessing Controller • Check if the connection cables are firmly connected.
After inspecting and confirming the above particulates, go ahead with commissioning procedure.
Prior to powering on the indoor unit, ensure that the outdoor unit power and signal cables are connected and
the outdoor unit MCB is closed.
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