YZ Systems NJEX 8300G, Manual, Page: 98 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 91 NJEX 8300 ver.092001 ATEX Rev.
SSSSS
ECTION ECTION
ECTION ECTION ECTION
13: 13: 13: 13: 13: 8300 S 8300 S 8300 S 8300 S 8300 S
Y YY
Y YSTEM
STEM
STEM STEM STEM
TTTTT
R RR
R ROUBLESHOO
OUBLESHOO
OUBLESHOO OUBLESHOO OUBLESHOOTING
TING
TING TING TING
Specific Verometer Expansion Tank
High Alarm IssuesTroubleshooting
Steps
When an active XTank High alarm is indicated the
following steps should be taken:
1. Verify that the expansion tank pressure is at 25 psi
(1.72 Bar) and correct if necessary.
2. Inspect the alarm set point programmed into the N-
300 controller and verify that it is correclty pro-
grammed and correct if necessary,
refer to the
parameters section on programming the N-300
controller
Section 5, page 29 or Section 6, page 35
depending on the mode of operation.
3. Observe if the alarm is still active, if it is, contact YZ
Technical Services.
Specific Verometer Overfill Non-Alarm
Indicator IssuesTroubleshooting Steps
When an active Overfill non-alarm is indicated the
following steps should be taken:
IMPOR
MPOR
MPOR MPOR MPORTTTTTANT NO
ANT NO
ANT NO ANT NO ANT NOTE:
TE:
TE: TE: TE:
Prior to troubleshooting an overfill indicator verify that the
Verometer is not in a full level position as the fill valve
commands can not be processed if the Verometer is full.
1. Empty the Verometer by performing a forward purge.
2. After returning all pressures and valves to their
normal operating position. Observe the Verometer
level for 5 -10 minutes and note if a change in the
Verometer level occurs without operator influence.
If level in the Verometer does increases without
operator influence,
proceed to the Fill Valve Trouble-
shooting section of this manual on page 89 . If the
level in the Verometer does not increase then
otherwise proceed to the next step below.
3. Initiate a Verometer fill and record the time required
to fill to 100%, and note the level. If the Verometer
fills in a time faster than 30 seconds, partially close
the volume throttling valve between the odorant
storage tank and the NJEX System. This should
slow the fill rate. Repeate step 3 until the NJEX
System fills in over 30 seconds, and the fill valve
turns off between 100 - 108% of fill volume.
Specific Verometer Fill Rate Non-Alarm
Indicator Issues Troubleshooting Steps
When an active Fillrate non-alarm is indicated the
following steps should be taken:
1. Verify the correct set pints on the following pressures.
a. Expansion Tank set at 25 psi
(1.72 Bar)
b. Bulk Tank set at 30 - 36 psi
(2.07-2.41 Bar)
c. System Supply set at 75 psi (5.17 Bar)
2. Empty the Verometer by performing a forward purge.
Re-establish the pressures and valves to their normal
operating position, and then proceed to step 3.
3. Perform the Verometer fill procedure as indicated in
System Maintenance, Section 12, page 78, and
adjust fill rate control valve V9 to achieve a apporiate
fill rate.
Pump Alarm Troubleshooting
There are three pump alarms monitored by the N-300
Controller to ensure correct and safe operation of the
NJEX System. The alarms relating to the pump perfor-
mance and their description is as follows:
• Over Pump alarm will indicate if the actual pump
displacement exceeds the programed pump displace-
ment value by 30%.
• Under Pump alarm will indicate when the actual
pump displacement ranges from 30 - 75% of the
programed pump displacement value.
• Pump Failure alarm will indicate when the actual
pump displacement is less than 25% of the pro-
gramed pump displacement value.