Cosa 9610 - Operation; Flow Alarm

INSTALLATION, OPERATION AND MAINTENANCE MANUAL – COSA 9610™
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• Rapid exchange pressure gauge
• Venturi orifice
• Regulator
• EXP pressure loss alarm switch
1.7.2. Operation
With the inert gas supply connected, enclosure power deenergized and alarm system
energized (if utilized).
1. Carefully read start-up instruction nameplate on system.
2. Check operation of the enclosure protection vent (model EPV-2), opening it manually
several times.
3. Seal protected enclosure.
4. Open enclosure pressure control valve, by turning CCW, to set enclosure pressure
gauge at “safe” pressure, the pressure loss alarm switch should then activate to silence
the alarm system (if utilized).
5. Ensure the protection system enclosure pressure gauge maintains a “safe” pressure
for one (1) minute.
6. Open Rapid Exchange control valve fully by turning 90° CCW and quickly ensure the
enclosure protection vent opens. Note: The enclosure pressure gauge should move
quickly off scale to the right, this is normal for all Rapid Exchange purging systems.
7. Standby for the exchange time as specified on the start-up instruction nameplate (five
minutes minimum), then close the Rapid Exchange control valve fully.
8. Wait for the enclosure pressure gauge to return to a "safe" pressure and energize the
protected enclosure power via the local disconnect switch.
9. Ensure the enclosure pressure indicator maintains a “safe” pressure before leaving
system unattended.
1.8 Flow alarm
The flow alarm is an ABB Automation Series 10A6100 Purgemaster
TM
meter. It is a low capacity, glass