SECTION 5: SYSTEM CONTROL ELECTRONICS
YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, PA • USA • 18974 • P: 281.362.6500 • www.yzsystems.com
NJEX ZEO Version 04/13/2021
Page 41
Additional adjustable parameters within the Odorization Parameters menu are defined as below:
Flow (No Signal)
is the predetermined percentage of max gas flow that the operator would like
the N-400 controller to default to in the event that the actual flow input signal is lost. To enable,
see step 2.7 below.
Low Flow Shutoff
is a percentage of the max gas flow at which the system will stop injecting
odorant. This allows the controller to sense low flow conditions where the operation is not desired.
When the flow signal rises above this set point, the N-400 will resume normal operation. The
Low Flow Shutoff parameter is only applicable with an analog flow signal. To enable, see step
2.7 below.
Pump Capacity
is set during the mROY calibration during system installation. The maximum
pump capacity is dependent on the back pressure for the system. The maximum pump capacity
is used to create an accurate performance curve of the ZEO system upon startup. It is
recommended that if the discharge pipeline pressure has large variations over time or during high
and low seasons, the pump be recalibrated to prevent nuisance alarms and allow for the most
accurate monitoring.
Odorant Output
will generate a pulse for every lb or kg injected depending on the value input.
The output relay is located at TB12, terminals #3 and #4,
refer to the Wiring Control Document in
Appendix B for reference. To enable, see step 2.7 below.
To set odorization parameters
2.1. Beginning from the home screen, press the Select Key to open the Main Menu
2.2. Select the Odorization Parameters
menu
2.3. Verify the Injection Rate, Max Gas
Flow, and Odorant Density are in
the desired base unit. If units are
not in the preferred base unit, see
the
System
Configuration
Parameters above.
2.4. To continue, use the navigation
arrows to navigate to the desired
Operational Mode, Prop-To-Flow or
Manual. Press the Select Key to
select the Operational Mode. The
selected mode will be identified by
a filled circle next to the mode
options.
2.4.1. To operate in Prop-To-Flow
mode, a flow signal must be provided. See Calibrating Input Signals on the next
page on the acceptable flow signal types and how to calibrate.
2.5. To set the Injection Rate, use the navigation arrows to highlight the Injection Rate value.
Press the select to key to begin editing. When in editing mode, the value will be filled
with a dark background and the value will be displayed in light text. Press (or hold for
large changes in value) the Up Arrow Key and Down Arrow Key to adjust the Injection
Figure 23 Odorization Parameters Menu
