Air Products GASGUARD TE10, Инструкция по установке, эксплуатации и обслуживанию, Страница: 146 / 196

GASGUARD
®
TE10 Distribution System Manual
Air Products and Chemicals, Inc. 8 - 22
If hazardous process gas has been
introduced to the Distribution System
panel, the operator should open venturi
supply valve, V7, and confirm adequate
vacuum on PT5 before opening any vent
valve in Manual Mode.
Specific manual valves may have to be
opened during Manual Mode
operations. The operator must
understand the consequence of opening
a valve before performing this step. All
Line manual purge and vent valves must
be returned to closed positions after
completion of Manual Mode operations.
8.6.3 To SECURE Manual Mode:
1. The Secure option will allow an operator to exit the Manual Mode menu while
remaining in manual mode with valves open. The Secure option will not be
selectable if no valves are open. When the operator chooses Secure from the
Manual Mode menu, the controller will leave the bank in manual and allow the
operator to go to other screens. Any open valves will remain open, and the
Mode Status Box will continue to indicate manual mode. Manual mode will
remain active or ‘secured’ until an operator reenters the Manual Mode menu.
While manual mode is ‘secured’, Manual Mode will be the only selectable
option on the Main Menu.
Distribution System must not be left
unattended in Manual Mode, as access to the
system in Manual Mode is open to anyone.