INSTALLATION, OPERATION AND MAINTENANCE MANUAL – COSA
9610™
18 | Page
one installation to another.
The following parameters must be entered for the dynamic purge time:
• Enclosure volume
• Number of exchanges
The purge time will be based on the measurement of the vent and evaluation of this
measurement from the EPCU. This allows recalculation of the time based on this
measurement. During the dynamic purge time, the user-interface will display the purge time
in a percentage starting with 0% and ending with 100% (purge time complete).
1.6.2.8. Purging Modes
Purging start-up can be set up in 4 different modes, which are explained below:
• STD – Standard mode requires the operator to engage the manifold solenoid valve
manually when purging and manually disengage when a successful purging is
complete.
• SA – Semiautomatic mode requires the operator to engage the manifold solenoid
valve manually when purging. The EPCU will automatically disengage when a
successful purging is complete.
• FA – Fully-automatic mode will automatically engage the manifold solenoid valve
when safe pressure is detected and will automatically disengage when a successful
purging is complete.
• PV –The proportional mode will continuously control the flow rate during and after
purging. This allows maximum efficiency of the protective gas supply. This is very
useful for areas where there is a limited amount of the protective gas supply
available.
1.6.2.9. Inputs
There are (4) intrinsic safety inputs for activation of various outputs and actions by the
EPCU. These inputs accept only a dry contact for activation and are supplied by the EPCU’s
galvanically isolated barrier. The assignments of the inputs for various actions are achieved
through the user-interface controller. Only one function can operate an input. These inputs
can bypass the system for live maintenance on the enclosure.
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