Create PDF To Save Offline

 

 

 

 

 

rainman watermakers logo

 

 

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

 

www.rainmandesal.com

 

support@rainmandesal.com

 


Introduction

This guide provides very specific instructions on upgrading a Rainman Framed Torrent watermaker with a manual control panel to the fully automated control panel. It is intended as a supplement to the auto control panel user guide. Study that general user guide to configure the system using the phone app, install the remote micropanel, and learn general system use.

torrent rainman automatic
rainman automated framed

Sensors

The five sensors used by the system are physically located on or near the rear of the main panel. They are preinstalled at the factory. 

High Pressure Sensor – Measures static pressure at the reverse osmosis membrane. Required for pressure control of the watermaker.

Low Pressure Sensor – Measured static pressure between the prefilter and the high pressure pump. Required to ensure the high pressure pump has sufficient flow to avoid cavitation.

Salinity Probe – Measures conductivity as a proxy for salinity. Used to ensure satisfactory water quality.

Product Water Flow Meter – Measures the fresh water flow. In brackish or fresh water, this will replace the pressure for control of the watermaker.

Brine Flow Meter – Not used in controlling the watermaker, but of great use to calculate total system flow in any troubleshooting situations.

Rainman Automatic Watermaker Sensors

External Connections

Several external plumbing or electrical connections are required to install the auto control panel. All of these connections are required for a modular installation, but many of them are internal for a framed system. Only a few of these are required for a framed installation.

Note that the cables colours and size of the brine waste hose may be different to the photo on the right. All cables will be clearly marked upon receiving the system.

Rainman Auto Watermaker Electrical Connections

Remove Manual Control Panel

Disconnect all power (AC and DC) supply to the watermaker prior to commencing the work. Also ensure boat’s water supply is turned off and unpressurised.

Remove Filter Housings

Remove the prefilter and carbon filter housings to gain access to the watermaker internals. Mark them accordingly to remember positioning.

Autoflush Disconnect

Remove the black cable wrap from the cable bundle to expose the individual wires.

The small silver autoflush timer box is mounted on the inside front of the frame. Trace the wire from the timer box to find the grey Deutsch connector marked with red heat shrink wrap. Disconnect the plug.

Two nuts and bolts on the front of the frame hold the autoflush timer box. Remove those nuts to unfasten the timer box.

The autoflush timer box can now be removed. Since the fresh water flush function is integrated into the new auto panel, this timer box is no longer required.

Low Pressure Disconnect

Disconnect the yellow low pressure hose from the analogue gauge on the rear of the panel.

Brine Disconnect

Disconnect the clear brine waste hose.

Note: If system is a 140lph unit, this hose will be green.

Product Water Disconnect

Three white hoses are connected to the manual control panel. These should all be removed.

PSU Cable

The DC supply wires for the manual control panel is spliced into the cable with the triangular Deutsch connector. Disconnect the cable. 

Junction Box

Remove the screws on the front of the junction box to access the internals. The green and white leads connect to a small relay inside the box. Disconnect it from the relay and remove, leaving other wiring in place.

The grey cable is no longer required after the auto panel upgrade.

Physical Panel Removal

Remove the eight screws securing the manual control panel to the frame.

The manual control panel can now be physically removed from the frame. It is not used after the auto control panel upgrade.

Install Auto Control Panel

Low Pressure Hose

The electronic low pressure sensor is physically attached to the brine waste line on the new auto panel. 

Use a 22mm spanner (wrench) to loosen the brine waste hose elbow fitting so it can be rotated into a convenient position.

A small tee fitting is provided to connect the analogue gauge, electronic sensor and the prefilter. The branch section of the tee connects to the analogue pressure gauge. Cut small sections of yellow hose to fit the tee into the digital and analogue gauges as shown in the photo.

Secure the brine elbow fitting with the spanner (wrench) so it’s approximately right angle to the auto control panel.

Reconnect the brine waste hose to the barb provided.

Power and Relay

A cable bundle is connected to the rear of the new auto panel. Connect the power supply wires to a continuous 12VDC supply.

Note: The auto panel needs to be supplied by 12VDC only. It is NOT compatible with 24VDC supply.

Junction Box Relay

Feed the cable marked “PSU” into the junction box. Connect the red and black cables to the relay as shown.

Diverter Valve

Mount the diverter valve to the inside of the frame using two holes in the upper rear left. Connect the power plug from the auto control panel.

Fresh Water Flush

If the framed system already incorporates a solenoid valve (see photo) attached to the carbon filter housing, no action is required.

If a motor valve exists, replace it with the two way solenoid valve. Attach the plugged cable to the valve.

Product Water Hoses

Fresh product water flows from the reverse osmosis (RO) unit through the control panel analogue and digital flow metres, then through the manual diverter valve and finally the solenoid diverter valve.

Diverter Valve

Insert the white product water hose sections into the pushfit connections on the diverter valve. Route the hoses to / from locations labeled in the photo.

Photos of the diverter valve and product water tee as installed.

Reconnect Power

Re-read the general auto control panel manual for remote micropanel installation and panel operations.

After system is completed, turn AC and DC supply power back on to the system.