Emerson VSG Installation Manual download pdf (Page 27)

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

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 On-site 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:

• Dial Indicator (0.001” Graduation, 0”-1” Range) with

12” Adjustable Arm and Magnetic Base

• Feeler Gauge Set, 0.0015”-0.020” Range, 12” blade

length

• Infrared Heat Gun

• Oil Pump (maximum of 2-3 GPM with motor ap-

proved for Division 1 or Division 2 and with ability to

overcome suction pressure)

• Sockets and wrenches up to 2-1/2” (63.5 mm)

• Torque Wrenches (with ranges from 0 to 600 ft-lbs)

• 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

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