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VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG
Compressor Unit Inspections Prior to
Storage or Installation
The compressor unit must be inspected prior to instal-
lation since components could have come loose and/or
damaged during shipment or moving.
• Check for loose bolts, particularly the compressor
and motor mounting nuts.
• Check for bent or damaged components. The com-
pressor unit should have also been inspected prior to
off-loading, see Delivery Inspection.
• Check that the nitrogen pressure is still holding pres-
sure. The pressure gauge is located at the discharge
bleed valve on the block and bleed assembly. Any
leaks must be fi xed and the system purged and re-
charged with dry nitrogen.
Recommended Onsite Tools
The tools recommended to have on site are important
for troubleshooting, inspections and compressor unit
operation. Besides general mechanic tools, these tools
are recommended:
• Oil Pump (maximum of 2-3 GPM with motor ap-
proved for Division 1 or Division 2 and with ability to
overcome suction pressure)
• Infrared Heat Gun
• Torque Wrenches (with ranges from 0 to 600 ft-lbs)
• Sockets and wrenches up to 2-1/2” (63.5 mm)
• Voltmeter
AIR COOLED OIL COOLERS
The following are general recommendations. Refer to
specifi c air cooled oil cooler manufacturer instructions
for storage recommendations.
• If the coolers are to be stored or not operated for an
extended period of time, the fan motors may ingress
moisture if they are not protected or operated regu-
larly. In severe cases, the moisture will reduce the in-
sulation level of the windings or cause rusting of the
bearings necessitating removal for repairs at a motor
repair facility. This is a common problem with large
generating installations when the coolers are often
ready but commissioning of the main turbine-gener-
ator is delayed for several months.
• The simplest remedy for installed coolers is to oper-
ate the fan motors for a few hours every week dur-
ing the downtime period until regular operation
resumes. The fan motors on stored coolers must be
protected from the elements by covering them with
waterproof tarps.
Section 3 • Installation