Mount the IntelliDose controller within 1.5 metres of the sample pot but in a position well away from water splashes or mist/vapour rising from the reservoir tank. It should be mounted in a cool, dry place out of direct sunlight. Remove the screws holding the back on and fit the mounting feet, then screw to the wall. If using the dry wall (plaster board) anchors use the longer screws supplied but if fixing to a ply back board use the shorter screws.

Typical installation using peristaltic pumps

HINT:

  1. Keep sample pot low down just above top of tank as many small pumps have quite low head pressure capability 
  2. Mount IntelliDose away from spray and humidity from tank and stock solutions 

Typical installation using solenoid valves

Note that a small jet of water may be directed over the surface of the tank to stir and aerate the nutrient solution. This can be achieved by heating and squeezing with pliers an outlet from a Tee fitting. Ensure that your pump has excess capacity before doing this.

Layout showing use of high and low water levels

NOTES

 

  1. If irrigation is used then a second small pump should be used to continuously circulate the solution through the sample pot and keep the tank stirred. The irrigation pump would then need a “pump start relay” with a 24V DC coil to switch it on only when an irrigation is called for. 
  2. If the irrigation water is returned to the reservoir tank then allowance must be made for the level to rise a little above the float valve level. 

The power supply to the IntelliDose must be between 12V and 24V either AC OR

DC. The outputs to the solenoid valves or pumps will be the same as the supply going into the controller. This means that if 24V AC solenoid valves are used then the supply adapter must provide 24V AC. Never connect a power supply exceeding 24V to the controller. A 24V DC power supply adapter is normally supplied together with either 24V DC solenoid valves or 24V DC peristaltic pumps

Connection diagram for 1,2 or 3 part nutrient dosing

The low voltage power from the adapter is connected to the two-left connection on the left-hand connector. With many power supplies the cable is a screened “co-axial” type. In this case the screen should be connected to the “Common” and the centre wire to the 24V line connection on the controller.

The connection diagram for more than three part nutrients must be printed by IntelliGrow software AFTER configuration has been complete. If you are not intending to use IntelliGrow, please ask your supplier if they are able to pre-configure and print out the wiring diagram for you.

Solenoid valves

Secure the solenoid valve panel to the wall. If using the plaster board anchors, screw the anchors in firmly until they are flush with the wall. The anchors supplied are self-drilling and so there is no need to predrill the wall. Just position them, give them a light tap to get started and then turn to drill/screw in with a Phillips or pozi screw driver. Use the longer metal screws to fix the valve plate to the nylon anchors or if fixing to a solid wood back board, use the shorter screws supplied.

Next connect the valve using the cable supplied to the outputs as shown above. Check that the voltage rating of the valves matches the voltage rating of the power supply e.g. if the valves are 24V DC then the supply should also be 24 V DC.

The solenoid valves are installed as shown overleaf.

Peristaltic pumps

You can direct drive 24V DC peristaltic pumps if you have the appropriate power supply. The small pumps available from our distributors draw a current of up to 1.2 Amps and so to run three pumps at the same time, you will need a 4 or 5A, 24V DC power supply. To avoid the necessity of such a powerful supply you may select the “Sequential dosing” option (in the configure menu). In this case, pumps are run one after the other and so at any one time there is only one pump running. A 2A, 24V DC supply is sufficient for this. We have available a 2.5A supply that allows 2-part (but NOT 3 part) dosing to run simultaneously or 3-part dosing to run sequentially.

To install stock tanks and solenoid valves

  1. If the stock tanks are to be installed on a raised shelf this must be attached to the wall in a very strong way as full stock tanks can be very heavy and if the shelf was to give way could result in a serious injury. If in doubt, get a skilled tradesman to install the shelf. 
  2. Carefully drill clean holes near the bottom of the stock tanks. Insert the tank fittings and tighten securely. Thoroughly clean out the drums. Attach the flexible hose to the tank fittings and lead down to the solenoid valve board. Push the tubes on to the inlet at the front of the valves 
  3. Fit the reducers and thin tubes to the bottom outlet pipes. Thin 5mm tube is used here to restrict the flow through the solenoid valves, which might otherwise be too great for small systems. If you shorten these pipes ensure that they are of equal length or the flow rates from the A, B, C tanks will be unequal. 
  4. After filling the stock tanks leave the lids loose to allow air to enter the tank as the stock solution is drawn off via the solenoid valves (or drill a small hole through the lid) 
  1. Thoroughly clean tanks to ensure that no plastic shavings are left in them  
  2. Test with water first to ensure no water leaks and system operates correctly then fill tanks with the stock solutions 
  3. For acids and alkalis, ensure that they are diluted to less than 2% strength
  4. Some valves have breather pipes that must reach the top of the stock tanks. These pipes ensure that the tubes are fully emptied after each dose. Note that although some valves have tube shapes moulded on the side these might be closed off in which case no breather is required. If in doubt, check by blowing through the side tubes to see if they are blanked off. 
  5. Wire the two solenoid valves to their respective connections on the controller as shown in the wiring diagram 

Wiring diagrams

Note that all the connections marked 24V common are connected together internally and you may connect the return from any solenoid valve or pump to any of these commons

The common wire from the power supply is the bare silver wire.

IMPORTANT

The voltage at the outputs will always be the same as the voltage from the power adapter. We normally supply 24V DC unless a different voltage or AC has been specifically requested.

Wiring Peristaltic pump wiring

Note that all the connections marked 24V common are connected together internally and you may connect the return from any solenoid valve or pump to any of these commons. 

IMPORTANT

The connection diagram for more than three part nutrients must be printed by IntelliGrow software AFTER configuration has been complete. If you are not intending to use IntelliGrow, please ask your supplier if they are able to pre-configure and print out the wiring diagram for you.

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