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1.4.10.2 Restart
Proceed to the complete starting procedure like "First start"
1.4.10.3 Restart after a short standstill period of time (less than 1 month)
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07.04.2021
Notice "Pre-start check list", also consult the plant manual and verify the
following items:
–
Check the oil temperature (refer to the "Product Information").
–
Check crankcase oil level (refer to Section 2.4.1, Page 35).
–
If by-pass valve between suction and discharge line of the
compressor is present;
The by-pass valve between suction and discharge line of the compressor
has to be opened at the same time as the "start release signal" is given
Start the compressor and check whether the oil pressure increases.
Warning!
The time interval between stopping and starting should be at least 2
minutes and between starting and re-starting 10 minutes.
Slowly open suction stop valve and watch suction pressure, which may not
exceed the max. value.
Warning!
Refrigerant liquid hammer, will damage the compressor; Dry gas
(superheat) is always necessary!
In case of electrically operated capacity control:
One or more cylinders will be energized.
Watch maximum allowable motor current (refer to motor type plate).
Watch discharge temperature and max. allowable motor current (refer to
motor type plate).
Adjust pressure gauge stop valves, in order to avoid vibration of the pointers.
(if present)
Open the stop valve in the oil return line from the oil separator (if present).
Drive:
•
Direct drive; After 50 hours of operation re-tighten the coupling bolts
•
V-belt drive; Check and/or correct the tension of the V-belts and re-tighten
the foundation bolts (with due respect to the torque settings given by the
supplier of the fasteners!).
Hint!
For the time interval between stopping and starting refer to "Main
setup data"-overview.
INSTALLATION AND PREPARATION FOR USE
PREPARATIONS FOR USE
31
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Troubleshooting
