Municipalities - Page 52

The Hunter Mini-Clik, Rain-Clik and Wireless Rain-Clik are compatible with all brands of irrigation controllers and can be installed by your professional irrigation contractor. Rain sensors are required by law in some areas, so it is a good idea to check with your contractor or local water authority before having an irrigation system installed.

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You can manually test proper operation of the rain sensor by using the One Touch Manual Start. During the Manual All stations cycle, press the test button on the “Clik-type” sensor (eg. Mini-Clik®) to interrupt watering.

Note: The rain sensor will only interrupt watering in Manual All Stations and automatic programming.  Manual single station will override the sensor circuit.

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The dry out time could be as little as 4 hours depending on the weather conditions (temperature and humidity) and the rain threshold that is set. If the weather conditions remain cold and damp, your sensor could be active for months.

Hunter Rain Sensors and Solar Syncs have two seperate options for setting a rain shutdown threshold:

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There are two reasons why a sprinkler will leak water when the system is supposed to be off.

  • The most common reason is called “Low Head Drainage”. "Low Head Drainage" occurs when the lowest head on a zone allows water to drain from the lateral piping, out of the sprinkler. If it is low head drainage, residual water will stop flowing after all the water has left the pipe.

The solution is to install check valves, such as the HCV, on sprinklers and lateral lines.

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valve components
  1. Valve Bonnet
  2. Flow Control handle
  3. Bleed Screw
  4. Solenoid
internal valve components
  1. Diaphragm Supprt Ring
  2. Diaphragm
  3. Diaphragm Spring
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Rotary sprinklers require a certain amount of pressure and flow to operate properly. If the rotor does not receive the pressure it needs to pop up a leaky head will result.

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The Hunter NODE and WVC battery powered controllers can have the valve installed a maximum of 100 feet (30 m) away.

XC Hybrid Wire Sizing Chart

Below is a chart indicating maximum wire lengths when using a Hunter DC latching solenoid combined with a Hunter XC Hybrid controller.

 

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A battery-operated controller sends a quick DC pulse to operate the solenoid, therefore the battery-operated controller requires a DC latching solenoid to operate correctly. Also, the DC latching solenoid will have one black wire for the common wire and one red wire for the station wire. It is important that the wires are connected correctly for proper operation. Black connected to the C or COM (common) terminal inside the controller, and the red wire connected to the appropriate station terminal.

 

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While most of the time the distance between the controller and pump start relay doesn't create any problems, every once in a while the wires on the 24V coil can allow electromagnetic noise to travel back to the controller. This noise is made when the contacts on the pump start relay make and break the connection.

It's recommended to use a minimum distance of 15ft (4.5m) separation between the controller and the relay, to help dampen any electromagnetic noise.

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There are three possible reasons:
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