Section 3 • Installation
Long Term Storage Recommendations
The procedure described is a general recommendation for long term storage (over one month of no operation) of Vilter compressor units. It is the responsibility of the installation firm and end user to address any unusual conditions. Use the supplied long term storage log sheet to help with record keeping, see section page
Warranty of the system remains in effect as described at the beginning of this manual, section page i.
The following are recommendations regarding long term storage:
•If the unit is designed for indoor duty, it must be stored in a heated building.
•If the unit is designed for outdoor duty and is to be stored outdoors, a canvas tarp is recommended for protection until installation. Adequate drainage should be provided. Place wood blocks under the base skid so that water does not collect inside the base perimeter or low spots in the tarp.
•All compressor stop valves are to be closed to isolate the compressor from the remainder of the system. All other valves, except those venting to atmosphere, are to be open. The unit is shipped with dry nitrogen holding charge of approximately 5 psi above atmo- spheric pressure. It is essential that the nitrogen hold- ing charge be maintained.
•The nitrogen or clean dry gas holding charge in the system and compressor are to be monitored on a regular basis for leakage. If not already installed, it is required that a gauge is to be added to help moni- tor the nitrogen holding charge pressure. If a drop in pressure occurs, the source of leakage must be found and corrected. The system must be evacuated and recharged with dry nitrogen to maintain the package integrity.
•Cover all bare metal surfaces (coupling, flange faces, etc.) with rust inhibitor.
•Desiccant is to be placed in the control panel. If the panel is equipped with a space heater, it is to be ener- gized. Use an approved electrical
•All pneumatic controllers and valves (Fisher, Taylor, etc.) are to be covered with plastic bags and sealed with desiccant bags inside.
COMPRESSOR MOTOR
The following are general recommendations. Refer to specific motor manufacturer instructions for storage recommendations.
•Remove the condensation drain plugs from those units equipped with them and insert
NOTE
Bags must remain visible and tagged, so they will be noticed and removed when the unit is prepared for service.
•Cover the motor completely to exclude dirt, dust, moisture, and other foreign materials.
•If the motor can be moved, it is suggested that the entire motor be encased in a strong, transparent plas- tic bag. Before sealing this bag, a moisture indicator should be attached to the side of the motor and sev- eral bags of
•Whenever the motor cannot be sealed, space heat- ers must be installed to keep the motor at least 10°F above the ambient temperature.
•Rotate motor and compressor shafts several revolu- tions (approximately 6) per month to eliminate flat spots on the bearing surfaces. For motors utilizing
•If the compressor unit is installed, wired and charged with oil, open all oil line valves and run the oil pump for 10 seconds prior to rotating the compressor shaft. Continue running the oil pump while the compressor shaft is being turned to help lubricate the surfaces of the shaft seal.
For additional storage information, refer to Appendices.
3 – 2 | VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG |
