Check List Periodical Inspection; Steps For Longer Shut-Down Periods (> 6 Months) - GEA Grasso 5 Installation And Maintenance Instructions Manual

INSPECTION AND TROUBLE SHOOTING
STEPS FOR LONGER SHUT-DOWN PERIODS (> 6 months)
2.2.1

Check list periodical inspection

Check list periodical inspection
5
CHECK POINTS *
Oil level in crankcase
Colour of the oil
Lubricating oil pressure
difference
Min. control oil pressure
Oil temperature max.
Oil leakage of shaft seal max.
Suction pressure
Discharge pressure
Suction superheat
Intermediate superheat
Discharge temperature max.
Oil temperature min.
Condition of V-belts
Adjustment and operation of
pressure safety switches
Capacity control (if provided)
Switching frequency of the
compressor
Number of operating hours
Air cooled oil cooler
2.3 STEPS FOR LONGER SHUT-DOWN PERIODS (> 6 months)
5
34
FREQUENCY
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During the first 50 operating hours the compressor should be checked regularly for all the points
mentioned above, at least twice every 24 hours and more frequently in cases where irregularities are
found.
Between 25% and 75% height of the sight glass. For
topping up oil, refer to Section 2.4.1, Page 35.
The oil should be transparently clear. A disappearing
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white colour points to dissolved refrigerant.
Refer to the "Product Information"
Refer to the "Product Information"
Refer to the "Product Information"
• In case of more than 1 cc/hr contact supplier.
Check against design conditions. Refer to plant
manual.
Refer to plant manual. For the max. allowable
discharge pressure refer to the technical data of
compressor.
Refer to the "Product Information"
Refer to the "Product Information"
During compressor standstill the lower part of the
crankcase must remain warmer than the
surroundings: ≥ 20 °C (NH
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Hint!
Refer to the "Product Information"
Check belts for:
1) Wear (fraying, cuts etc.) and ensure that they do
not touch the groove bottom.
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2) Tension. Too low a tension gives rise to excessive
flapping or oscillation in operation. For correct tension
consult Grasso instruction 0087516
• Refer also to instructions of switch manufacturer.
Check the number of operating hours in view of any
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maintenance operations to be carried out.
Check the cooler fins and fan for dirt / dust. Clean fins
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and fan
REMARKS
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07.04.2021