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Section 3 • Installation
Compressor Inspections Prior to
Installation
The compressor must be inspected prior to installation
since components could have come loose and/or dam-
aged during shipment or moving.
• Check for loose bolts, particularly the compressor
mounting nuts.
• Look into the suction and discharge connections and
inspect for any signs of corrosion on parts.
• Check for bent or damaged components. The com-
pressor should have also been inspected prior to off-
loading, see Delivery Inspection.
• Check that the nitrogen pressure is still holding pres-
sure. Any leaks must be fixed and the system purged
and re-charged with dry nitrogen.
• Prelube the compressor with the main oil pump and
rotate by hand several revolutions prior to start.
• Notify Vilter
Service and Warranty Department
TM
when the compressor is started.
For Pre Start-Up and Start-Up checklists, please
contact Vilter Service and Warranty Department.
CAUTION
Before installation, follow the proper procedures to
depressurize the compressor.
Long Term Storage Recommendations
The procedure described is a general recommendation
for long term storage (over one month of no operation)
of Vilter compressors. It is the responsibility of the instal-
lation firm and end user to address any unusual condi-
tions. Use the supplied long term storage log sheet to
help with record keeping, see section page 3-3.
Warranty of the system remains in effect as described at
the beginning of this manual.
The following are recommendations regarding long
term storage:
• If the compressor is designed for indoor duty, it must
be stored in a heated building, preferably air condi-
tioned to control moisture, to prevent corrosion of
the main rotor shaft and for the compressor.
• 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
3 – 2
NOTE
HPLD Single Screw Compressor •Installation, Operation and Service Manual • Emerson • 35391HP
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 nitro-
gen holding charge of approximately 5 psi above at-
mospheric pressure. It is essential that the nitrogen
holding charge be maintained.
• Cover all bare metal surfaces (main rotor shaft, cou-
pling, 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 spray-on corrosion
inhibitor for panel components (relays, switches,
etc.)
• All pneumatic controllers and valves (Fisher, Taylor,
etc.) are to be covered with plastic bags and sealed
with desiccant bags inside.
• Before leaving Vilter™ Manufacturing the compres-
sor is evacuated and pressurized, with dry nitrogen,
to 5 psig. Pressure must be monitored with the gauge
(provided by Vilter™) and checked on a regular basis
(at least monthly).
• It is essential that the nitrogen or clean dry gas hold-
ing charge be maintained. 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.
• Manually rotate the compressor shaft 6 ½ revolutions
every month to prevent flat spots on the bearing sur-
faces. 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 compres-
sor shaft. Continue running the oil pump while the
compressor shaft is being turned to help lubricate
the surfaces of the shaft seal. For cool compression,
there is no pre-lube pump, so the driveshaft must be
turned by hand.
• Maintenance log to be kept with documenting dates
to show all the procedures have been completed (see
next page).
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