Emerson Vilter VSS - Compressor Unit Leak Check After Servicing; Oil Sampling

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Section 5 • Maintenance/Service
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
Compressor Unit Leak Check After
Servicing
The compressor unit must be checked for leaks after
servicing to ensure a tight system. For additional leak
testing information, refer to Chapter VI of ASME B31.3
Process Piping Code.
CAUTION
Do not hydro test compressor unit. Failure to comply
may result in damage to equipment.
1. If servicing the compressor unit was completed,
proceed to step 2. Otherwise, isolate the compres-
sor unit from the house system, see Compressor
Unit Isolation procedure.
2. Open all shut-off valves, check valves, control valves
and solenoid valves in the system to be tested.
3. Slowly pressurize compressor unit through suction
oil charging port with dry nitrogen.
4. Using appropriate soap solution, check for leaks on
joints and connections of the serviced component.
5. If leaks are found, depressurize system and x leaks.
Repeat steps 3 and 4 until all leaks are xed.
6. Evacuate from suction oil charging port.
7. Close all valves previously opened in the system.
Remove tags as per the local lock-out/tag-out
procedure.
8. Turn the motor and oil pump disconnect switches
to the ON position.
9. Return compressor unit to service. Oil System
Components
Oil System Components
Oil Sampling
WARNING
When working with LFG, NG or other dangerous
or fl ammable gases, ensure there are adequate
ventilation and vapor detectors. Refer to national fi re
and building codes. Failure to comply may result in
serious injury or death.
WARNING
Improper selection or application of fl uid diagnostic
products can cause serious injury or damage. The
user is solely responsible for making the fi nal
selection of products to ensure that the overall system
performance and safety requirements are met. These
include reviewing fl uid compatibility with materials
and seals.
WARNING
Avoid skin contact with any condensate or oil. Wear
rubber gloves and a face shield when working with
condensate or oil. Failure to comply may result in
serious injury or death.
DANGER
Sampling often releases hot fl uid under high
velocity/pressure.
1. Hot fl uid can cause severe burn injuries.
2. Skin penetration from high-pressure fl uid
can occur, causing severe injury, gangrene
and/or death. If this happens, immediate-
ly contact an experienced medical practi-
tioner.
3. Hot fl uid escaping to the atmosphere can
ignite if it comes into contact with an igni-
tion source. This can lead to severe property
damage.
Recommendations:
1. Make sure you´re aware of the risks associated with
the uid being sampled or worked with. Check with
the manufacturer.
2. If you have not been trained to sample, service, re-
pair, or troubleshoot a pressurized uid system,
especially a hydraulic system, you are at risk of suf-
fering an accident. Seek the proper training before
proceeding.