Operating manual - SAB 120-151 A-frame (including ATEX)
008668 en 2019.08
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Maintenance instructions
8. Maintenance instructions
8.1 Maintenance of compressor unit
Read chapter 4. Safety precautions carefully before performing any maintenance on the com-
pressor unit.
To ensure that the compressor unit operates without problems throughout a long service life, the
system of maintenance presented in the following instructions must be followed. If any local rules
exist, these must always be followed.
Daily maintenance is normally performed by the operating personnel. Other maintenance and
service tasks that require the refrigeration system to be opened must be performed by competent
personnel.
Maintenance can be divided into 3 groups:
1. Daily maintenance
(minimum twice a week)
Daily maintenance consists of visual inspections.
• Inspect the compressor unit and check that both noise and vibrations are normal.
• To observe trends it is recommended to enter the observed operating data into an
operations log, see subsection 8.3 Monitoring of operation. Check that all operat-
ing values are within the permissible ranges. Compare them with previous values
to detect trends.
• Check the oil level in the oil separator.
• Check the refrigerant charge.
• Observe for leaks of refrigerant (smell of R717), oil or water.
• Check mechanical seal oil draining bottle.
• Check the control system for alarms/shutdowns.
2. Periodic maintenance
Motor lubrication and other routine maintenance tasks are usually based on running time.
Please refer to Table 13: Maintenance intervals .
3. Major overhaul
For major maintenance tasks such as compressor overhauls, contact Johnson Controls
Denmark.
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