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12
Step 5: Set up advanced features
INSTALL THE SENSOR
To install an MP5 sensor to the D20 display/controller, you will:
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Connect the sensor to the controller
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Warning:
Do not plug in the power cable to a power outlet yet!
INSTALL THE SENSOR
A flow sensor must be installed and configured in the D20 controller if Chlorine and acid feeds are used. A flow
sensor ensures water flow when pumps add chemicals. The controller should be set according to the following:
When
FLOW NEED
is set to a numeric value on the controller, relay activation will only occur when the flow
reading exceeds 0. If
No Flow
is displayed on the controller, the flow value will be displayed as a positive
number once flow commences.
1.
As Chlorine tablets typically reduce pH, select
CHL SET
>
CHLORINE
.
2.
Set
4-20mA Lower Limit
>
pH
to a numeric value on the controller.
3.
(Output relay 2 should be used to add a base chemical to decrease the pH level.)
CONNECT THE SENSOR TO THE CONTROLLER
Use the following pinouts to connect sensors to the controller:
Pin
Input
Color
1
Ground NC
Black
2
Flow
Brown
3
5VDC
Red
The 7-pin terminal block J2 is used for the input from various sensors (ex:
flow sensor, flow switch, optical liquid sensor). The flow sensor connects to
pins 5, 6, and 7.