Operation; Regular Tests; Maintenance; Integrated Pressure Relief Valve - Biber OSKA9563 Instructions De Service

become hotter than the suction gas line or the com-
pressor.
For further information about pipe layout, see manual
SH-510.

7 Operation

7.1 Regular tests

Examine the system at regular intervals according to
national regulations.
• Operating data, see chapter Checking the operating
data, page 12.
• Oil supply, see chapter Checking the operating data,
page 12.
• Safety and protection devices and all components
for compressor monitoring, see chapter Safety and
protection devices, page 9 and see chapter Check-
ing the operating data, page 12.
• Tightness of the integrated check valve.
• Check the elastomer elements of the coupling after
the running-in period and then once a year.
• Tight seat of electrical cable connections and
screwed joints.
• Screw tightening torques (see SW-100).
• Refrigerant charge.
• Tightness
• Prepare data protocol.

8 Maintenance

DANGER
Hair, hands or clothes may get caught in the
coupling!
Serious injuries are possible.
Secure the coupling zone with a separating
cover (protective grid)!
WARNING
The compressor is under pressure!
Serious injuries are possible.
Depressurize the compressor!
Wear safety goggles!

8.1 Integrated pressure relief valve

The valve is maintenance-free.
SB-520-1
However, after repeated venting, it may leak perman-
ently because of abnormal operating conditions. The
consequences are reduced performance and a higher
discharge gas temperature.
Recommended replacing interval: 100,000 h.

8.2 Integrated check valve

If the check valve is defective or contaminated, the
compressor runs for some time in reverse direction
after it has been switched off. The valve must then be
changed.
Recommended replacing interval: 20,000 .. 40,000 h.

8.3 Oil filter

It is recommended to change the oil filter for the first
time after 50 .. 100 operating hours. During operation,
the degree of contamination can be permanently
checked by the oil filter monitoring (option).

8.4 Oil change

The listed oils (see chapter Application ranges, page 5)
are characterised by a particularly high degree of stabil-
ity. With NH operation, it is recommended to change
3
oil once a year or after each 5,000 operating hours.
Impurities stemming from the plant components or op-
erating outside the application ranges are the only
things that can cause deposits to form in the lubricating
oil, causing it to darken. In this case, change the oil.
Also renew the oil filter. Determine the cause of operat-
ing outside of the application area and eliminate it.
Oil types: see chapter Application ranges, page 5.
WARNING
Oil separator and oil cooler are under pressure!
Serious injuries are possible.
Depressurize oil separator and oil cooler!
Wear safety goggles!
Dispose of waste oil properly!

8.5 Shaft seal

A routine check of the shaft seal is generally not re-
quired.
However, with regard to the operational reliability, a
check in connection with oil change or faults in the lub-
ricating circuit is recommended.
In doing so, pay particular attention to:
• hardening and cracks on the O-rings
13