YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, Pennsylvania • USA • 18974 • P: 281.362.6500 • www.yzsystems.com
Page 89
NJEX EUR ver. 08-2021
Section 13: NJEX System Troubleshooting
5. If the pipleine pressure is near or below
17.24
Bar
, a back pressure regulating device must be
installed immediately outside the NJEX enclosure,
on the odorant line leading to the pipeline injec-
tion point. If this device is installed, verify that is
is maintaining a back pressure regulating device
above
17.24 Bar
.
6. Verify that the total run of tubing from the pipeline
to the NJEX System does not exceed 1
4.5 Me-
ters.
Verometer Fill Valve Failure Alarm
Troubleshooting Steps
When an active
Flvalv-Fail
alarm is indicated the fol-
lowing steps should be taken:
CAUTION:
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 trig
-
ger an alarm.
2. Verify that all valves in the system are in the cor-
rect 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 ob-
serve 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 pres-
ent 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 discon-
nected, toggle the mode switch from run to standby
and back again. This should stop and start the pneu-
matic 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 pres-
ence of moisture. Dry the connections if mois-
ture is present and try test again. If moisture
on the solenoid was not the problem, check
the interconnect 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 op-
posing sides of the connector align. These pins must
be correctly aligned to ensure the electronic signals
reach the correct electronic address in the micropro-
cessor.
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.
Summary of Contents for NJEX 6300G
Page 1: ...NJEX 6300G 7300G N A T U R A L G A S O D O R I Z A T I O N S Y S T E M...
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Page 3: ...NJEX 6300G 7300G Instruction Operating Manual Version 08 2021...
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