Commissioning
Preliminary check
Check electrical power supply:
• Phase order: For H-series compressors equipped
with an electronic module, reverse rotation will
be automatically detected. For more details refer
to section “Motor protection”.
• Voltage and voltage unbalance within tolerance:
For more details refer to section “Motor voltage”.
Initial start-up
System monitoring
• Crank case heaters must be energized at least 12
hours in advance to remove refrigerant.
• A quicker start-up is possible by “jogging” the
compressor to evacuate refrigerant.
Start the compressor for 1 second, then wait for
1 to 2 minutes. After 3 or 4 jogs the compressor
can be started. This operation must be repeated
for each compressor individually.
The system must be monitored after initial
startup for a minimum of 60 minutes to ensure
proper operating characteristics such as:
• Correct superheat and subcooling.
• Current draw of individual compressors within
acceptable values (max operating current).
• No abnormal vibrations and noise.
• Correct oil level.
If Oil Top-up is needed, it must be done while the
compressor is idle. Use the schrader connector
or any other accessible connector on the
compressor suction line. Always use new cans.
For more detailed information see “Lubricants
filling in instructions for Danfoss Commercial
Compressors” TI 2-025-0402.
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FRCC.PC.012.A7.02
GENER
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ORDERING INFORM
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