Irritrol MC-E User Manual download pdf (Page 35)

Flow Sensor (Sold Separately)

Flow monitoring is one of the best water resource management tools available in the irrigation industry today. With

denable over and critical ow values, broken lateral or mainline piping, stuck valves and damaged sprinklers can be

quickly detected and bypassed automatically.

The ow sensing capability of the MC-E allows it to learn actual ow rates for every station. These ow rates are stored

in the memory for comparison use. Whenever a station is activated, MC-E will monitor and compare the values to detect

if overow or critical ow values have been violated. The overow percentages are user dened to ne tune the system.

The MC-E is designed to function with a normally open master valve and a ow sensor. The Data Industrial PVC tee

ow sensor model 228PV, 250BR or equivalent are the recommended sensors for use. When MC-E detects a ow value

that violates the station ow parameters, the ow alert LED indicator will illuminate. The MC-E will make an audible

beep every 30 seconds to notify you of the ow error. The controller will also display the problem station on the LCD.

The ow alert indicators will continue until the detected ow is returned within the set parameters and the button is

pressed.

Flow sensing requires that Station 2 is used for a normally-open master valve rather than a

regular station. See Optional Setup.

Flow Sensor Installation

Step 1 – Install the ow meter into the main pipe that only

supplies irrigation to the area being monitored.

Typically, it is installed just before or after the

master valve. Install the ow sensor according to

the provided instructions. Pay particular attention to

the ow direction and to the length of straight pipe

required before and after the ow sensor. Take note

of the sensor size and the pulse rating for the MC-E

ow sensor setup.

Step 2 – Route a two-wire irrigation cable from the ow

sensor to the MC-E controller. The cable can be

2000 ft. in length when using a shielded two-

conductor, 20 AWG or larger stranded copper wire.

Leave extra wire length to allow for future servicing.

Take note which wire is installed to the red sensor

wire as well as the black sensor wire.

Step 3 – At the controller terminals, connect the “Red” wire

to FLOW+ terminal. Connect the “Black” wire to

the FLOW- or SENSOR- terminal. See illustrations.

The controller will beep every 30 seconds

when an ow error is detected.

IMPORTANT! Sensor wires must be installed in the correct polarity for

proper operation. If you plan to use the controller’s ow sensing function,

set ow parameter and learn the ow value for all the stations being used.

MC-E will not execute the ow diagnostic if an active station is without

ow settings even if other active stations have ow settings congured.

VALVE

COMMON

VALVE

COMMON

VALVE

COMMON

MASTER

VALVE

YEL RED

VALVE

COMMON

GND

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48

INHIBIT SENSOR START SENSOR FLOW SENSOR

FLOW +

MC-E Models with 12 or less stations

Red Sensor Wire

Black Sensor Wire

FLOW –

MC-E Models with 18 or more stations

SENSOR – FLOW +

Black Sensor Wire

Red Sensor

Wire

1 2 ... 30 31 32 33 34 35 36 37 38 39 40

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Irritrol MC-E User Manual Page 35

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