Emerson VSG Installation Manual download pdf (Page 77)

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VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391STG

Section 5 • Maintenance/Service

WARNING

When rigging and lifting a bare shaft compressor,

use proper lifting device capable of lifting and

maneuvering the weight and size of the compressor.

Use only qualiﬁ ed personnel and additional personnel

and lifting equipment (i.e. spreader bar) as required.

Failure to comply may result in death, serious injury

and/or damage to equipment.

NOTE

Refer to Bare Shaft Compressor Lifting Points and

Weights section for appropriate lifting hole sizes,

weights and lifting points.

15. Install appropriate lifting eyes on top of compressor.

16. Using appropriate lifting device and additional per-

sonnel, remove compressor from frame.

17. Remove shims and spherical washers from com-

pressor mounting locations.

18. Inspect shims and spherical washers for damage,

replace as required.

INSTALLATION

19. Install shims and spherical washers on compressor

mounting locations, see Figure 5-15.

20. Install appropriate lifting eyes on top of compressor.

21. Using appropriate lifting device, position compres-

sor on compressor mounting locations on frame.

22. Loosely install studs, lock washers, ﬂ at washers and

nuts to secure compressor to frame until alignment

is correct.

23. Check compressor for soft foot. Add or remove

shims as required until measurements are within

+/- 0.002”.

24. Tighten nuts to secure compressor to frame, refer

to Appendix A.

25. If equipped with C-ﬂ ange, install bolts to se-

cure C-ﬂ ange to compressor. Tighten bolts, see

Appendix A.

26. If equipped with C-ﬂ ange, install C-ﬂ ange coupling,

refer to C-ﬂ ange Coupling Replacement procedure.

27. Install coupling, see Drive Coupling Installation and

Alignment procedure .

28. Install coupling guard.

29. Install nuts and bolts to secure discharge pipe to oil

separator and compressor.

30. Tighten nuts on ‘discharge pipe-to-compressor

ﬂ ange’ ﬁ rst, then tighten nuts on ‘discharge pipe-

to-oil separator ﬂ ange’, see Appendix A.

Compressor Replacement

Notify Vilter prior to performing a compressor replace-

ment. See Warranty instructions in Section 7.

REMOVAL

To replace a compressor on a unit, proceed with the fol-

lowing steps:

NOTICE

Dispose of the oil in a appropriate manner following

all Local, State and Federal ordinances regarding the

disposal of used oil.

1. Shut down and isolate the compressor unit, see

Compressor Unit Isolation for Maintenance and

Service procedure.

NOTE

Note location of cables to aid in installation.

2. Disconnect all cables from sensors on compressor

and actuators.

3. Remove drive coupling, see appropriate Drive

Coupling Replacement procedure.

4. If equipped with C-ﬂ ange, remove bolts securing

C-ﬂ ange to compressor.

5. Remove center member, see Drive Coupling

Removal procedure.

6. Using appropriate drain pan, drain oil by removing

drain plugs from under compressor housing and

discharge manifold. Allow oil to completely drain.

7. Remove all oil lines from the compressor.

8. Support suction line with appropriate supporting

equipment.

9. Remove nuts and bolts securing suction strainer/

check valve assembly to suction stop valve and

compressor.

10. Using appropriate lifting device, remove suction

strainer/check valve assembly from compressor.

11. Remove nuts and bolts securing discharge pipe to

compressor and oil separator, see Figure 5-15.

12. Remove discharge pipe and gaskets from compres-

sor and oil separator.

13. Remove nuts, ﬂ at washers, lock washers and studs

securing compressor to frame.

14. Remove any additional lines and/or components to

allow removal of compressor as required.

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Emerson VSG Installation Manual Page 77

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