Operating instructions

MAINTENANCE
31 Dec 13 5-7
DE-7200VFDCentrifuge
PURGE SYSTEM
Bypassing Purge System
The purge unit may be bypassed when necessary to apply electric power to the centrifuge while
the control cabinet door is open, but this should be done only after verifying that the
centrifuge is in a non-hazardous area. After completing the work, the purge system must be
restored to operation and satisfactory operation confirmed. Refer to Section 4 for the purge
system bypass procedure.
DANGER! HIGH VOLTAGE! USE EXTREME CAUTION WHEN OPERATING
CENTRIFUGE WITH PURGE SYSTEM BYPASSED. DANGEROUSLY HIGH
VOLTAGE WILL BE PRESENT IN CONTROL CABINET IF DOOR IS OPENED
WHILE POWER IS APPLIED.
EXPLOSION HAZARD! BE CERTAIN THAT SURROUNDING ATMOSPHERE IS
CLEAR OF ALL POTENTIALLY EXPLOSIVE GASES BEFORE OPENING
CONTROL CABINET DOOR.
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.
Inspection and Test Procedures
Periodic inspection and test procedures, supplemented by any additional requirements
imposed by local codes, are recommended. The following tests should be performed at
least every 6 to 24 months depending on site conditions.
Visual Inspection and Checks
1. Inspect condition of relief valve and spark arrestor. Remove all debris and corrosion.
2. Check/drain air supply filters on cabinet exterior.