MNL000447.doc
Revision 0 0
09/19/2016
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
Confidential and Proprietary Data
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8.3
New System Startup Procedure
In NEC Class I, Division II hazardous locations
(applies only in the U.S.A.) or Explosive
Atmospheres (applies only in the European
Community), do not apply power to the
Distribution System controller until the
controller enclosure has been purged for at least
20 minutes at a pressure at or above 0.1" H2O
as monitored by the internal Z
purge pressure switch (hazardous locations
only). Refer to steps 3 and 4 below. This
complies with NFPA 496 and ATEX regulations
regarding electrical equipment enclosures.
Failure to do so could result in the ignition of
any flammable gas which may be present.
1.
Verify that the system is ready for startup by completing the startup checklist in
the installation manual. Check that the GASGUARD Distribution System and
all plant piping have been leak checked with a helium mass spectrometer in
accordance with the customer's specified procedure. Check that the
GASGUARD Distribution System has been functionally checked after
installation.
2.
Check that the Distribution System exhaust system and hazardous gas
disposal system (pollution abatement) are operating.
3.
Verify that house nitrogen pressure is between 85-95 psig (5.9-6.6 barg).
4.
To initiate Z-purge, open the gas flow needle valve one to two turns counter