YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 87
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
•
XTank High
alarm indicates the pressure in the
expansion tank has exceeded the defined high
pressure set point for the Expansion Tank.
Non-Alarm Verometer Indicators
•
Overfill
is indicated when the Verometer has filled to a
level of 112% or greater.
•
Fillrate
alarm is indicated when the Verometer fills to
112% or greater in less than 10 seconds.
Verometer Troubleshooting Steps
1. Verify the following operating conditions, and correct
as necessary:
a. Expansion tank pressure is set at 25 psi
(1.72 Bar)
.
b. Bulk odorant storage tank pressure is at least 5
psi
(.34 Bar)
and not more than 10 psi
(.69 Bar)
,
above expansion tank pressure.
c.
Actuation supply pressure is maintained during
operation at 75 psi
(5.17 Bar)
.
d. Verify that the bulk odorant storage tank has
odorant and all valves are in the correct posi-
tions to allow the verometer to fill.
2. Important: Check and adjust the throttling valve
position for effect on filling prior to proceeding to
troubleshooting.
Restart the NJEX System to inspect the verometer for a fill. If
no fill occurs, observe if a
No Fill
alarm is indicated under the
Verometer display sequence and troubleshoot accordingly.
Specific Verometer Cable Alarm
Issues Troubleshooting Steps
When an active
VMTR-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 elec-
tronic 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.
Specific Verometer No-Fill Alarm
Issues Troubleshooting Steps
When an active
No-Fill
alarm is indicated the following
steps should be taken:
IMPORTANT NOTE:
Before attempting to troubleshoot the fill valve, verify
that the status switch is in the run position and the
Verometer is not in a full level position. The fill valve
commands can not be processed if the Verometer is full,
or the status switch is in the standby position.
1. Check actuation gas supply filter and valves for
possible restriction or closure, and adjust or replace
as necessary.
2. Check odorant filters for possible restriction and
replace as necessary.
3. Check tubing between bulk odorant storage tank
and enclosure for damage. If tubing is crimped,
bent or damaged by any form that could restrict
flow, replace the tubing.
4. Test for adequate fill valve pneumatic actuation
pressure. Place a guage at the tubing connection
located on top of the fill valve by disconnecting
tubing. During a fill, the valve actuation pressure
should be 75 psi
(5.17 Bar)
.