Vertiv™ | Liebert® SRC-G | User Manual 44
Start-up Commissioning
The inspection requirements after starting-up are listed in Table 4-2.
Table 4-2 Component Inspection after Starting-up
Components Inspection Requirements
Fan
• Check if the rotation direction of the blades is correct.
• Check and record the rated full load current and actual current of the fan motor.
Outdoor fan
• Check if the rotation direction of the blades is correct.
• Check and record the rated full load current and actual current of the fan motor.
Refrigerant charge
amount
• Check after the compressor is turned On, if the refrigerant (R410A) is dynamically
charged, and check if the condensation and sub-cooling temperature reach to 5 K or
more, while the suction superheat temperature reaches 10 K or more.
• Observe the compressor suction line to ensure that the piping and compressor housing
are free of condensation to avoid potential damages caused due to liquid presence.
• Check if the unit exhaust superheat is in the range of 25 °C to 50 °C.
Others
Record user setpoint values, return air temperature, suction pressure, exhaust pressure,
compressor current, and outlet air temperature.
4.2. Function Testing
The lethal voltage may be present in the unit which can be fatal, therefore cut O the power supply prior to
functional testing. All notes, warnings, and cautions marked on the unit as well as the ones mentioned in the
manual must be considered, otherwise, it may leads to injury and fatality.
Only qualified service and maintenance personnel can perform system operation and maintenance.
4.2.1. Cooling
Adjust the temperature setpoint to 5 °C (10 °F) lower than the indoor temperature. Then the control system
triggers the cooling demand signal and the compressor starts to work. After at least 3mins of cooling, adjust
the temperature setpoint to 5°C (10°F) higher than the indoor temperature. If the compressor stops working, it
means that the cooling function is normal.
Restore the temperature setpoint to the default or the original value after the test.
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