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Manual Control Panel Salinity Board and Sensor Replacement

rainman watermakers logo

Rainman Technology Pty Ltd
49 Orchard Road
Brookvale, NSW 2100
Australia

www.rainmandesal.com

support@rainmandesal.com


Introduction

On rare occasions, it may be necessary to replace the salinity sensor board in the Rainman control panel. To avoid the need for calibration procedure, the board will come from the factory with a new probe that is precalibrated to the board.

It is important to keep the salinity sensor board and probe as a matching set or the calibration will be out.

Ensure power to the control panel is disconnected for this procedure.

Remove salinity sensor board

  1. Remove the two screws that secure the protective backing.
tds board backing
  1. Cut the zip tie that secures the salinity probe lead to the control panel.
tds zip tie
  1. Remove the protective back cover to expose the salinity sensor board.
tds board back removal
  1. Remove the salinity probe from the product water tee by pressing the ring in the tee and pulling the probe.
salinity probe removal
  1. Slide out the protective grommet from the control panel backing.
tds board grommet removal
  1. Disconnect the two connections for the LED indicator and the salinity probe.Important: Note the orientation of each connector to ensure it slots in correctly upon reassembly.
tds board led connection
tds board probe connection
  1. The grommet has a slit between two holes. Remove the salinity probe connector by pressing it through this slit.
tds grommet slit
tds grommet wire pullthrough
  1. The black and red wires are the 10-32VDC input. The green and white wires are the 12VDC output to power relay in PSU. Remove all four of these wires, noting the positions of each one.
tds board power connection
tds board power wiring
  1. Remove the four screws from each corner of the salinity sensor board and gently lift the board out of position. Note that these screws are stainless steel, so will not hold to a magnetic screwdriver.
tds board screws
tds board removal

Replace salinity sensor board and updated fittings

  1. Reverse the above steps to reinstall the salinity sensor board into the control panel.

    Important: Do not press the “Calib” button as it will reset the probe calibration. The board and probe are pre-calibrated at the factory.

  1. Remove the 8mm tube from the 3 way valve and flow meter by pressing in the ring on the fitting to loosen the tube.
  1. Remove tee fitting from flowmeter and replace with the adaptor stem, being careful not to cross thread.
  1. Remove the 8mm fitting from center of 3 way diverter valve and replace with the 10mm fitting supplied.
  1. Push the 12mm tee onto adaptor stem of flowmeter.
  1. Push the white 10mm tube into 12-10mm stem elbow at one end and into 10-10mm stem elbow at the other end.
  1. While holding tee firmly, push the 12mm stem elbow with tube attached into it.
  1. Push the 10mm stem elbow into divert valve push fit fitting.
  1. While holding tee firmly and with the notch of probe facing up, push the probe into tee.
  1. The replacement is now complete. The rear of the control panel should look like this photo.