ESP-LXD 2-Wire Decoder Control System Installation & Troubleshooting Guide
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Flow & Station Management
The ESP-LXD 2-Wire Decoder Controller can manage up to five (5) water points of connection, five (5)
Master Valves, and five (5) FloZones through a variety of hydraulic configurations using the following
concepts and/or features:
Master Valve
– A valve or pump start relay that controls (turns on/off) a point of connection
where the irrigation system connects to the water supply.
Flow Sensor
– Used to monitor the irrigation system real-time flow rate. The current system
flow rate is displayed at the controller and totalized in a flow log. The flow rate is used to detect
high or low flow conditions and diagnose and shutdown the problem valve or water source and
issue alarms.
FloZone
– A group of stations that receive water from one or more points of connection. Each
water source would have its own Master Valve and Flow Sensor. If a mainline receives water
from two or more points of connection the controller combines the input from all associated
flow sensors to determine the FloZone real-time flow rate.
There are two primary Flow Management features:
FloManager (available on ESP-LXD and ESP-LXD models)– Manages the total system flow rate by
dynamically selecting one or more stations that operate simultaneously to use the full capacity
of the water source. Operating the irrigation system at peak flow capacity shortens the overall
time it takes to irrigate the site and reduces pumping power costs
FloWatch (available on ESP-LXD models only) – Monitors and logs the real-time system rate
with a flow sensor. A Learn Flow Utility learns and records the nominal flow rate of each station.
If a high or low flow condition is detected, the controller will follow user configured steps to
diagnose and eliminate the problem (problem station valve or water source is quarantined).
SimulStations™
The ESP-LXD can operate multiple programs and stations concurrently. The controller ensures
sufficient power is available to operate a maximum of eight (8) valve solenoids simultaneously.
The range of SimulStations available per program (ABCD) is one (1) through eight (8)
The range of SimulStations available for the entire ESP-LXD controller is one (1) through (8) for
irrigation and non-irrigation stations.
Each normally closed master valve that needs to be open for irrigation to occur reduces the
maximum SimulStation by 1. Example: The system has one (1) normally closed master valve.
The maximum number of SimulStations is reduced from eight (8) to seven (7).
