Daisy 9017, Руководство пользователя

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Model 9017 Y/Z-Purge Operator Interface Daisy Data Displays, Inc.
February 2022 8 D011-000002
4.3 Purge Air Line Connection Instructions
4.3.1 For Division 1 Z-Purge Systems Model 9017
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 150 SCFH at 20 - 100 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. This must be 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 P015).
3. Bleed the purge air or inert gas line to insure that dirt, moisture, and other
contaminants are cleared from the line prior to connecting the line to the unit!
4. Connect the line to the inlet of the regulator on the Purge Unit.
5. Apply air or inert gas to the enclosure. The enclosure may “swell” slightly as the
internal pressure increases. This is normal and is not a cause for concern. DAISY
enclosures are designed to release excess pressure.
DO NOT ATTEMPT TO OPEN
THE ENCLOSURE WHILE IT IS PRESSURIZED!