Irritrol MC-48E - Catastrophic Flow Sensor Protection (Optional Setup); Install Critical Flow Shut off Master Valve; Configure Station 1 for Flow Alarm Function; Catastrophic Flow Parameters

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Set Flow Sensor Model Flow Sensor Data Table
Step 1 – Place the Function dial to the FLOW
SENSING position. Enable
ow sensing if its disabled.
Step 2 – While in the K Value/Sensor Size
screen, select the ow sensor size
code by pressing the button.
Use the Flow Sensor table below to
nd your specic size code.
Example: If using Sensor Model
TFS-075, press the button until
the S value in the display equals 75
(S=75).
Set Flow Unit
Step 1 – Place the Function dial to the FLOW SENSING position. Enable ow sensing if its disabled.
Step 2 – Press the button to change the ow unit to the presets. Press the button repeatedly until the desired
ow unit is displayed (GPM = Gallons per Minute, CFM = Cubic Feet per Minute, CMH = Cubic Meter per
Hour, LPM = Liter per Minute or PPS = Pulses per Second).
If the sensor you choose is not represented on the chart, use “Unknown Flow Sensor” size code “00”. The ow
unit for “Unknown Flow Sensor” can only be set to PPS.
Read/Learn Station Flow Value
MC-E will only read/learn the ow of stations with active runtimes.
Step 1 – Place the Function dial to the FLOW SENSING position. Enable ow sensing if its disabled.
Step 2 – Verify that all ow parameters are set, then press the button to read/learn each of the station’s actual
ow. It will read/learn the station’s ow value until the ow delay time expires. The default ow delay is one
minute. During “Learn Flow” each station will be displayed with the ow that the sensor is measuring.
To learn the ow value of a specic station, enter the two digit station number and press the button.
To learn the ow value of a group of stations, enter the two digit station number of the 1st station, the two digit
station number of the last station and press the button. The MC-E will sequentially read the ow value for
each station in the group.
Press any key to stop the learning process. Learned values will not be saved when stopped.
Step 6 – To review each station ow parameters, press the button. MC-E will sequentially display each of the
station’s ow parameters.
Catastrophic Flow Sensor Protection (Optional Setup)
The MC-E provides a function to detect an unscheduled ow. Any detected ow in the system when no station is watering is
considered an unscheduled ow. The MC-E has the capability to monitor any unscheduled ow and activate Station 1 as a ow
alarm to shut off a normally open master valve.
The ow alarm can be used to activate a normally open master valve which is installed ahead of the other valves on the system.
Station 1 must be set to ow alarm in SETUP for this to function. The F00 (“F00” represents the upper ow limit for the main
line) parameters in the ow setup will dictate the overow threshold of the main line. When at any time MC-E detects an
unscheduled ow that violates F00 overow parameters, MC-E will activate station 1 to close the normally open master valve.
Install Critical Flow Shut off Master Valve
Step 1 – Find a location along the sub-main pipe that services
the irrigation system to install the normally open
master valve. The location should be ahead of any
valves in the irrigation system. Refer to the valves
installation instructions for further details.
Step 2 – Route a two-wire irrigation cable from the valve to
the controller. Connect one solenoid wire to the valve
common terminal and the remaining solenoid wire to
the Station 1 terminal.
Step 3 – Check for proper operation.
Configure Station 1 for Flow Alarm Function
Step 1 – Place the Function dial to the SETUP
position.
Step 2 – Press . Station 1 setup screen will be displayed.
Step 3 – Press the button to congure Station 1 as ow alarm to activate a normally-open master valve or press the
button to congure it back to station. Press to activate your selection.
Step 4 – Return the Function dial to AUTO/RUN position.
Catastrophic Flow Parameters
IMPORTANT! Set catastrophic ow, “F00”, above the highest owing valve in the system.
The setting for “F00” is the master valve, and therefore the main line, upper ow limit. If this limit is not set higher than the ow for
the largest station, any station with a ow greater than the main line ow limit will set off the ow alarm and shut down the system.
Step 1 – To set F00’s catastrophic ow limit, place the Function dial to the FLOW SENSING position. Navigate
to the Over percentage limit screen by pressing the button. If “F00” is not the displayed station number,
press the button repeatedly until “F00” is selected.
Step 2 – Enter a catastrophic ow limit that is above the learned ow of the station with the highest ow in the system
and press .
The ow sensor should be “sized” correctly so the catastrophic ow limit for the system is still within
the sensor’s reading range.
Step 3 – Adjust the catastrophic Overow. See “Set Overow percentages” section.
Flow Sensor
Station 1
Station 3
Station 4
Flow
Normally Open
Master Valve
(Station 2)
COM
FLOW +
COM
Sta 1
FLOW – or
SENSOR –
Sta 2
Sta 3
Sta 4