With the Remote Tank Switch (RTS) accessory you can automatically control filling of remote tanks. The RTS is used where the tank that is being filled is too far away to use a LORENTZ "Tank Full Switch" accessory.

Important: The Remote Tank Switch used with the S1-200 is not compatible with the S1-700 system. The two versions differ in size, and the S1-200 RTS includes hose connection adaptors. Please refer to the respective datasheet for detailed specifications.

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The Remote Tank Switch is installed on the discharge pipe (or hose) close to the pump controller. A float valve (not included) is installed in the tank situated at the end of the discharge line.
The RTS also includes a non-return valve to prevent water flowing back through the pipe into the water source.
The non return valve reduces the pipe refill time when the pump is switching on and off.

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When the tank is empty, the float valve opens, activating the pump through the Remote Tank Switch. If the tank is full, the float valve closes and stops the water flow. This action triggers the controller to stop the pump, via a signal coming from the Remote Tank Switch.
Every 15 minutes, the controller will start to analyze whether the tank needs to be filled or not. (changeable value in S-Connect app).

The following example shows the S1-200, the same fuction also applies to the S1-700.

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The Remote Tank Switch accessory connects to the controller input socket marked with the following symbol, which is printed on the housing of the controller.

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Below is a video showing how to correctly connect the accessory to the controller. (This example shows S1-200, the connection also applies to the S1-700)

Ensure that the RTS accessory is properly installed and connected to the S1 controller according to the installation manual. Also confirm that the S1 controller and PV installation are wired correctly and that the float valve is installed at the end of the discharge pipe in the tank.

IMPORTANT - The activation of the Remote Tank Switch must be done only through the S-Connect app by following the instructions below:

IMPORTANT - Make sure to select the correct "Pump end", refer to the article below for more information:

Follow these steps (see also page 2 of the manual):

Manual for the S1-200 RTS

• Install and connect all system components.
• Activate the Remote Tank Switch in the "S-Connect app":
  • Log in to the S-Connect app and select your pump system.
  • Go to "Settings" → "Advanced Settings"
  • Enable "Tank Switch" and select "Remote Tank Switch".
  • The default value of the "Start-up Time" is set for operation at the maximum pump head (see datasheet of "S1-200-HRE"). Adjust this value if your system is running with a lower head.
  • The "Retry Time" can be adjusted if necessary. This determines how often the controller checks, (by default every 15 minutes) whether the tank needs to be refilled.
  • Apply the changes.
• Switch the S1-200 controller on to resume normal pump operation.

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The pipework must be filled with water once during initial installation to ensure proper RTS functionality. To do this, follow these steps (see also page 2 of the manual):

Manual for the S1-700 RTS

• Install and connect all system components.
• Switch on the S1-700 controller and allow the pump to run until the riser pipes are filled with water and the water has reached the tank. This needs to be done once at initial installation before the remote tank switch is activated in the S-Connect app.
• Switch off the controller.
• Activate the Remote Tank Switch in the "S-Connect app":
  • Log in to the S-Connect app and select your pump system.
  • Go to "Settings" → "Advanced Settings"
  • Enable "Tank Switch" and select "Remote Tank Switch".
  • The "Start-up Time" is pre-set to 10 seconds and does not need adjustment.
  • The "Retry Time" can be adjusted if necessary. This determines how often the controller checks, (by default every 15 minutes) whether the tank needs to be refilled.
  • Apply the changes.
• Switch the S1-700 controller back on to resume normal pump operation.

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