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Model 9017 Y/Z-Purge Operator Interface
8 Trouble-shooting Guide
8.2 Division 1 Z-Purge Troubleshooting
PROBLEM
The flow cannot be adjusted up to
150 SCFH during purge
During operation (control valve set
to "Operate"), the internal
pressure does not reach/will not
maintain 1" of water column
February 2022
POSSIBLE CAUSE
Improper flow meter reading
Improper regulator adjustment
The purge control is not set to
purge
Insufficient air supply
Restrictions in the air supply line
Contamination in the air supply
Restrictions in the purge line from
the purge control into the
enclosure
The enclosure is not sealed and is
leaking
Insufficient air flow
Pack-Seals are not poured
Exhaust control valve setting
incorrect
14
Daisy Data Displays, Inc.
SUGGESTED SOLUTION
For correct operation, the purge
unit must be mounted vertically so
that the flow meter is vertically
plumb
Adjust the air inlet regulator to
increase air supply
Check the position of the control
valve to ensure that it is set to
"Purge"
Check your purge gas supply to
ensure that it can supply 150 SCFH.
If you cannot achieve 150 SCFH,
then purge times must be
recalculated. Contact DAISY
customer service for assistance.
Check your air supply line for
blockages and kinks
Ensure that the purge gas supply is
clean, dry, and free of oil – a
water/oil separator should be
installed near the connection to the
purge control
Ensure that the purge line from the
purge control into the enclosure is
not kinked, has no internal
obstructions, and is unrestricted at
its open end (at least 0.5" from any
object in the path of the air flow)
Ensure that all access doors are
closed and latched. Ensure that all
access panels are closed and sealed.
Make sure no unsealed holes or
openings are present in the
enclosure.
Adjust the regulator on the purge
control to increase the air flow
Pack-Seals must be poured in
conduits entering the enclosure to
prevent air from escaping via the
conduit entry. Ensure that this has
been done.
Adjust the purge control exhaust
valve for a higher internal pressure.
It may take several minutes for
adjustments to this setting to take
effect.
D011-000002
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