Bitzer OSK/N7441-EX, Operating Instructions Manual

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SB-509-2 17
Table of contents
1 Introduction........................................................................................................................................................ 18
2 Safety.................................................................................................................................................................. 18
2.1 Authorized staff............................................................................................................................................ 18
2.2 Residual risks and general safety references.............................................................................................. 18
2.3 Safety references especially for the use in zones 1 and 2 .......................................................................... 19
3 Application ranges ............................................................................................................................................ 19
3.1 Additional name plate .................................................................................................................................. 20
3.2 Defining the zone......................................................................................................................................... 20
4 Mounting ............................................................................................................................................................ 20
4.1 Capacity control by using solenoid coils in explosion-proof design ............................................................. 21
4.1.1 Retrofitting the capacity control........................................................................................................ 21
4.2 Start unloading without capacity control ...................................................................................................... 21
4.3 Coupling....................................................................................................................................................... 21
4.4 Oil injection conversion kit for explosion-proof areas .................................................................................. 22
4.5 Shaft seal..................................................................................................................................................... 22
5 Electrical connection ........................................................................................................................................ 23
5.1 Compressor motor ....................................................................................................................................... 23
5.2 High and low pressure limiter (HP and LP).................................................................................................. 23
5.3 Connecting a discharge gas temperature sensor ........................................................................................ 24
5.4 Oil flow switch .............................................................................................................................................. 24
5.5 Thermostat at the ECO suction line............................................................................................................. 24
5.6 Earth connection.......................................................................................................................................... 25
5.7 Outdoor installation...................................................................................................................................... 25
5.8 Schematic wiring diagrams OS.(A)74.-EX................................................................................................... 26
6 Commissioning.................................................................................................................................................. 29
7 Maintenance....................................................................................................................................................... 29
7.1 Updating a data protocol.............................................................................................................................. 29
7.2 Cleaning the system .................................................................................................................................... 29
7.3 Checking the electrical components ............................................................................................................ 29
7.4 Checking the discharge gas temperature sensor and the protection device ............................................... 29
7.5 Elastomer elements of the coupling............................................................................................................. 30
7.5.1 Checking the elastomer elements for wear...................................................................................... 30
7.6 Roller bearings and ball bearings ................................................................................................................ 30
7.7 Replacing the shaft seal .............................................................................................................................. 31