Brochure

43AB218186428184en-US1501
GENERAL INFORMATIONPRODUCT INFORMATIONSYSTEM DESIGNORDERING INFORMATION INTEGRATION INTO SYSTEM
Commissioning
Preliminary check
Check electrical power supply:
• Phase order: For H-series compressors, reverse
rotation is obvious if the compressor do not
build up pressure and sound level is abnormal
high. 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
• Crankcase heaters must be energized at least 8
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.
In installations with good oil return and line
runs up to 50 ft, no additional oil is required.
If installation lines exceed 50 ft, additional oil
may be needed. 1 or 2% of the total system
refrigerant charge (in weight) can be used to
roughly define the required oil top-up quantity.
Always use oil from new cans.
Top-up the oil while the compressor is idle. Use
any accessible connector on the compressor
suction line and a suitable pump.
Oil level checking and
top-up