Operating instructions

SECTION 5 - MAINTENANCE
31 Dec 13 5-1
DE-7200VFDCentrifuge
GENERAL
This section describes preventive and corrective maintenance procedures for the DE-7200 VFD
centrifuge. Obvious procedures are omitted. Before beginning any centrifuge maintenance, shut
down, lock out, and tag out equipment.
DANGER! HIGH VOLTAGE! SHUT DOWN, LOCK OUT, AND TAG OUT
ELECTRIC POWER, AND ENSURE THAT EQUIPMENT HAS STOPPED
ROTATING BEFORE WORKING ON THIS EQUIPMENT.
SAFETY GLASSES MUST BE WORN AT ALL TIMES WHILE PERFORMING ANY
MAINTENANCE PROCEDURE. FAILURE TO WEAR SAFETY GLASSES MAY
RESULT IN SERIOUS EYE INJURY OR PERMANENT LOSS OF VISION.
WARNING! WHILE OPENING AND CLOSING THE CENTRIFUGE COVER,
PERSONNEL MUST ENSURE THAT ALL BODY LIMBS AND ANY OTHER
ITEMS ARE CLEAR OF THE COVER GAP. TWO OPERATORS MUST BE USED,
WITH BOTH HANDS ON THE COVER HANDLES AT ALL TIMES. DERRICK
RECOMMENDS HAVING A HOIST AVAILABLE IF ADDITIONAL ASSISTANCE
IS DESIRED DURING THE OPENING/CLOSING PROCEDURE.
TOP COVER OPENING/CLOSING PROCEDURES
The proper procedures for opening and closing the top cover of the centrifuge must always be
followed. Two operators using both hands are required to open the cover. Derrick recommends
having a hoist available if additional assistance is desired during the opening/closing of the
centrifuge cover. To open and close the cover, proceed as follows:
1. Shut down, lock out, tag out electric power to centrifuge, and allow rotating assembly to coast
to a full stop.
2. Remove bolts securing cover to base.
3. Have two operators using both hands grip the cover handles securely to ensure full control of
the cover throughout the opening and closing process.
4. As the cover is raised, ensure that body limbs of all personnel and any other items remain
clear of the cover gap at all times.
5. Raise the cover to the fully opened position, and insert a 1/2” (12.7mm) hardened steel pin
through one hinge to lock the cover open.
6. After performing the activity that required the cover to be opened, reverse steps 2 through 5 to
close the cover. During the closing procedure, ensure that both operators are capable of
controlling the cover’s descent and that all body limbs and other items remain clear of the gap.