YZ Systems NJEX 7300L, Инструкция и руководство по эксплуатации, Страница: 99 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 89 NJEX 7300L ver.09042003
SSSSS
ECTION ECTION
ECTION ECTION ECTION
13: 13: 13: 13: 13: 7300L S 7300L S 7300L S 7300L S 7300L S
Y YY
Y YSTEM
STEM
STEM STEM STEM
TTTTT
R RR
R ROUBLESHOO
OUBLESHOO
OUBLESHOO OUBLESHOO OUBLESHOOTING
TING
TING TING TING
5. If the pipleine pressure is near or below 250 psi
(17.24 Bar), a back pressure regulating device must
be installed immediately outside the NJEX enclosure,
on the odorant line leading to the pipeline injection
point. If this device is installed, verify that is is main-
taining a back pressure regulating device above 250
psi (17.24 Bar).
6. Verify that the total run of tubing from the pipeline to
the NJEX System does not exceed 15’ (4.5 Meters).
Verometer Fill Valve Failure
Alarm Troubleshooting Steps
When an active Flvalv-Fail alarm is indicated the
following steps should be taken:
CA CA
CA CA
CAUTION: UTION:
UTION: UTION:
UTION:
Verify the following prior to comencing work:
1. Actuation pressure is not excessive. This can cause
the fill valve solenoid to open slightly when the
pump strokes, which would open the fill valve and
trigger an alarm.
2. Verify that all valves in the system are in the correct
position. A valve in the incorrect position may allow
odorant to enter the Verometer via a path other than
through the fill valve, resulting in a fill valve alarm.
For example, if valves V2 and V3 were left open, the
result would cause a fill valve alarm.
Verometer at 116%
1. Initiate a forward purge to lower Verometer level to
approximately 50% and return the NJEX System to
normal operating pressures and valve positions.
2. Place the NJEX System in standby mode and observe
level changes in the Verometer by monitoring the
Verometer level status on the N-300 controller display.
3. If the level increases disconnect the pneumatic
supply tube at the top of the fill valve to inspect if
actuation gas is present. If actuation gas is not
present when the tube is disconnected, and the
Verometer level continues to increase, repair or
replace the fill valve. If the actuation gas is present
in the tube when disconnected, the Verometer level
should stabilize after disconnecting the fill valve
pneumatic supply tube. Proceed to step 4.
4. While the fill valve pneumatic supply tube is disconnected,
toggle the mode switch from run to standby and back
again. This should stop and start the pneumatic supply.
a. If the pneumatic supply stays on, disconnect the
fill valve solenoid cable. If disconnecting the
cable does not stop the pneumatic supply,
replace the solenoid.
b. If disconnecting the cable in step 4a listed above
caused the pneumatic supply to stop, check the
electrical connections for the presence of
moisture. Dry the connections if moisture is
present and try test again. If moisture on the
solenoid was not the problem, check the inter-
connect cable for possible moisture or corrosion
where it connects to the mechanical enclosure.
Replace if corrosion or moisture is present.
5. If the step taken above do not resolve the issue
entire control head assembly must be replaced.
Verometer Odorant Inlet Cable
Alarm Troubleshooting Steps
When an active OdorInlet-Cable alarm is indicated the
following steps should be taken:
1. Inspect all cables for any external damage such as
cuts or crimps in the external cable sleeve or
moisture inside the cable connector.
2. Loosen and inspect the cable orientation pins for correct
positioning. All cables have a specific mating connection
to ensure that the correct pins on the opposing sides of
the connector align. These pins must be correctly
aligned to ensure the electronic signals reach the correct
electronic address in the microprocessor.
3. Reconnect cables as noted above, ensuring that the
alignment pins are mated correctly and that locking
rings are tight. Observe if the alarm is still active, if it
is, contact YZ Technical Services.