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Model 9017 Y/Z-Purge Operator Interface
3 Pre-Installation Testing
Before installing your system in its final location, you may wish to test it to verify that the
purge system is functioning correctly.
3.1 Division 1 Z-Purge Test
IMPORTANT NOTE:
Pre-installation testing should always be conducted in a safe area
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. Place the unit in a safe area near a source of the purge gas to be used (compressed air line
or other inert gas source).
2. Through a cord grip or other cable-sealing device, bring AC power into the enclosure.
sure that the AC power is off.
drawing E009 at the end of this manual).
3. Temporarily install a 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 at the
end of this manual.).
4.
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!
5. Connect the purge gas line to the inlet of the regulator on the Purge Unit.
6. 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.
IT IS PRESSURIZED!
7. Turn the control valve to PURGE. Look at the flow meter on the front panel to verify that
the flow rate is 150 SCFH. If not, readjust the purge regulator to set the flow to 150 SCFH.
8. If the flow meter does not read 150 SCFH, inspect the enclosure for blockage in the purge
gas lines and take appropriate action to clear the blockage. If blockages are not obvious,
verify that the purge air or inert gas is clean and dry.
9. Slowly turn the control valve to OPERATE. If the control valve is turned rapidly, the indicator
ball in the flow meter may start oscillating. Look at the pressure gauge on the front panel to
be certain that the internal pressure is 1.0" of Water Column. If not, reset the adjustment
on the exhaust assembly on the so that the pressure gauge reads 1.0" of Water Column.
10. Slowly turn the control valve to PURGE. Make sure that the flow meter reads 150 SCFH. If
not, readjust the regulator for 150 SCFH.
February 2022
Connect the AC power temporarily to the Z-purged unit (see
DO NOT ATTEMPT TO OPEN THE ENCLOSURE WHILE
3
Daisy Data Displays, Inc.
Be
D011-000002
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