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6000 Series Purge/Pressurization System
Set-up procedures of 6000 series system
1. Ensure that electrical, mechanical, and pneumatic
connections and requirements are met to operate
this system. Please refer to this manual and
standards for explanation of requirements.
2. Apply power to the 6000 series system.
3. (Step 3 is for initial set-up of the system.) The
factory default of the 6000 control unit is SA. To
adjust the programming of the system, please see
page 31 ("Programming menu") for instructions.
4. Verify that the "enclosure pressure control valve"
stem is closed before applying pressure to the
manifold.
5. Turn on the protective gas supply to the 6000
series system inlet on the manifold. Inlet pressure
should be below 120 psig (8.2 bar).
6. Larger cabinets may take longer to pressurize.
Put the system in SA or STD mode for this
procedure. Select the user interface display so that
the enclosure pressure is showing. This should
be reading less than 0.1" wc [(2.54 mm wc),
(.25 mbar), (24.9 Pa)]. Slowly open the needle
valve until you can feel air venting at the exhaust.
Do not exceed 1.5" wc [(38.10 mm wc),
(3.75 mbar), (374 Pa)].
7. If air is not exhausting at the vent, check for any
obstructions or improper installation.
8. The system is ready to operate.
Operation of the 6000 series system
Gas hazardous location
• Follow "Set-up procedures of 6000 series system"
• Enclosure is sealed.
• Pressure is set to a value above a minimum of
0.25" wc [(6.4 mm wc), (.625 mbar), (62 Pa)], or
the set value from the user input.
• Depending on how the purging mode is selected,
purging the enclosure is required.
• After a successful purging, with the pressure in
the enclosure above 0.25" wc [(6.4 mm wc),
(.625 mbar), (62 Pa)], the enclosure is considered
safe, and power to the enclosure can be
energized.
• If the safe pressure drops below 0.25" wc
[(6.4 mm wc), (.625 mbar), (62 Pa)], power to
the enclosure will be disconnected unless a time
delay for shutting off power is implemented (see
the requirements for time delay of power shut-off).
• To energize the enclosure again, repeat the
procedure.
Dust hazardous location
• Enclosure must be cleaned of all combustible dust.
Purging cannot be done to clean combustible dust
out of enclosure.
• Enclosure is immediately sealed upon removal of
combustible dust.
• Pressure is set to a value above a minimum of
0.65" wc [(16.5 mm wc), (1.6 mbar), (162 Pa)],
or the set value from the user input.
• With the pressure in the enclosure above 0.65" wc
[(16.5 mm wc), (1.6 mbar), (162 Pa)], the
enclosure is considered safe, and power to the
enclosure can be energized.
• If the safe pressure drops below 0.65" wc
[(16.5 mm wc), (1.6 mbar), (162 Pa)], the power
to the enclosure will be disconnected, unless a
time delay for shutting off power is implemented
(see the requirements for time delay of power
shut-off).
• To energize the enclosure again, repeat the
procedure.
I/O Manual
29
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