Daisy 9016 X-Purge, Руководство пользователя

Страница: 10 / 39

Model 9016 X-Purge Operator Interface Daisy Data Displays, Inc.
February 2022 10 D010-000002
4.2 Purge Air Line Connection Instructions
4.2.1 For Division 1 X-Purge Systems Model 9016
After the unit has been mounted in its final location in the hazardous area, it
must be permanently connected to a purge air or inert gas line and checked for
leaks and proper operation of the purge/pressurization system. Only when its
pressure integrity has been established should electrical signals and power be
brought “live” to the unit.
ALWAYS follow all NEC, NFPA, and local codes when installing purge systems
in hazardous areas! It is very important that knowledgeable personnel,
familiar with national and local codes, supervise hazardous area equipment
installations.
Equipment Required
•
Clean, dry purge air or inert gas supply equipped with local water/oil separator or
filter capable of supplying 40 to 300 SCFH at 30 to 60 PSI.
• Fittings and tubing for purge air or inert gas supply (0.25” NPT Male to connect to
the inlet of the purge system).
• Local air pressure shutoff valve.
Procedure
1.
Mount the enclosure
in the location in which it will be installed near the source of air or
inert gas to be used for the purge system.
2. Install the pressure regulator, water/oil separator or filter, shutoff valve, pressure relief
valve, and pressure gauge in the purge air or inert gas line (see drawing P011).
3. Bleed the purge air or inert gas line to ensure that dirt, moisture, and other contaminants
are cleared from the line prior to connecting the line to the unit!
4. Connect the purge gas line to the inlet of the regulator on the Purge Unit.
5. The PAC-Seals bringing the power and signals to the explosion-proof I/O casting should
already be installed. Connect the signal lines to the interlock system (see drawings E018,
E019, E022, and E025).
6. Ensure that the power to the AC supply lines is disconnected . Connect the power line(s) to
the X-Purge system (see drawing E017).
7. If the area can be made safe, you may want to test your connections before closing the
explosion-proof I/O casting. If you test the system in place, it is VITAL that you ENSURE
THAT THE AREA IS SAFE during the test and FOLLOW ALL APPLICABLE SAFETY
PROCEDURES for “hot work” in a hazardous area!
You can test connections without
purging by holding down the “Bypass Purge” button (see drawing E020) while applying
power; you must release the button within 30 seconds of power application to prevent a
diagnostic error. When the button is released, power and signals are immediately “live” to
the system; you can test operation to make sure that the connections have been made
correctly. Disconnect power IMMEDIATELY upon completion of this test to ensure that the
unit is not erroneously operated in bypass mode!
8. When the signal and power connections are complete, replace the cover on the I/O casting
and secure with the supplied 14 hex-head bolts and torque to 7.5 ft. lbs.