CB9A-020 page 8
OPERATION
PRE-STARTUP CHECK LIST
1. After the compressor is installed in the system, a complete leak test should be performed on both the
compressor and the piping.
2. Check the alignment of the pipes to the compressor. Pipes should be supported so that they do not spring
away or drop down when flanges or union joints are disconnected.
3. If V-belt driven, check the alignment of the motor and the compressor sheaves. The faces of the sheaves
must be parallel.
4. It is recommended that pressure gauges be installed in the discharge and inlet lines. These can be used
to check actual suction and discharge conditions after startup.
5. Check the electrical connections for proper wiring, grounding, etc.
6. Blackmer compressors are shipped from the factory without oil in the crankcase. Fill with a high quality oil
of the proper viscosity (see "Lubrication").
7. Disconnect the power and remove the nameplate. Squirt oil onto the crosshead guide bores and rotate
the compressor by hand to verify smooth operation.
8. Ensure that all guards are in place.
STARTUP PROCEDURE
1. Start the compressor and check for oil pressure within 30 seconds. The pressure should register 25 psig
(172 kPa). Adjust if necessary (see "Lubrication"). If proper oil pressure is not present, stop the
compressor and correct the problem. Operating the compressor with low oil pressure will cause severe
damage to the unit. Note: These models must operate with the proper rotation direction. See 'Rotation'
section.
2. Verify the suction and discharge pressures to ensure that all readings are within the expected ranges.
Operating limits listed in the "Compressor Data" section must not be exceeded
3. Check for leakage from the piping and equipment.
4. If the seals (packing) have just been replaced, the lower seal must be manually lubricated during the first
60 minutes of operation. See "Packing Lubrication" section. New compressors have had the packing
broken in at the factory.
5. On newly rebuilt units, the valve holddown screws, valve cover plate bolts and cylinder head bolts should
all be retightened after 60 minutes running time. Also retighten all holddown bolts, flywheel bolts, etc. after
60 minutes running time.
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