2.2.1 Check list periodical inspection
Check list periodical inspection
CHECK POINTS *
5
FREQUENCY REMARKS
daily
weekly
monthl
y
Oil level in crankcase •
Between 25% and 75% height of the sight glass. For
topping up oil, refer to Section 2.4.1, Page 35.
Colour of the oil
•
The oil should be transparently clear. A disappearing
white colour points to dissolved refrigerant.
Lubricating oil pressure
difference
•
Refer to the "Product Information"
Min. control oil pressure
•
Refer to the "Product Information"
Oil temperature max.
•
Refer to the "Product Information"
Oil leakage of shaft seal max.
• In case of more than 1 cc/hr contact supplier.
Suction pressure
•
Check against design conditions. Refer to plant
manual.
Discharge pressure
•
Refer to plant manual. For the max. allowable
discharge pressure refer to the technical data of
compressor.
Suction superheat
Intermediate superheat
•
Refer to the "Product Information"
Discharge temperature max.
•
Refer to the "Product Information"
Oil temperature min.
•
During compressor standstill the lower part of the
crankcase must remain warmer than the
surroundings: ≥ 20 °C (NH
3
)
Hint!
Refer to the "Product Information"
Condition of V-belts
•
Check belts for:
1) Wear (fraying, cuts etc.) and ensure that they do
not touch the groove bottom.
2) Tension. Too low a tension gives rise to excessive
flapping or oscillation in operation. For correct tension
consult Grasso instruction 0087516
Adjustment and operation of
pressure safety switches
• Refer also to instructions of switch manufacturer.
Capacity control (if provided)
•
Switching frequency of the
compressor
•
Number of operating hours
•
Check the number of operating hours in view of any
maintenance operations to be carried out.
Air cooled oil cooler
•
Check the cooler fins and fan for dirt / dust. Clean fins
and fan
2.3 STEPS FOR LONGER SHUT-DOWN PERIODS (> 6 months)
5 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.
INSPECTION AND TROUBLE SHOOTING
STEPS FOR LONGER SHUT-DOWN PERIODS (> 6 months)
0089288_imm_v_english_19
34 07.04.2021
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