Continuing to use the remote display for two-cylinder systems even with the pressure regulation system or changeover valve having been replaced?

Due to a timely exchange or upgrade, a new pressure regulation system such as the Caramatic DriveTwo is now in use. But what happens to the remote display for the two-cylinder system that was connected? GOK shows the different possibilities.

Has the two-cylinder system already switched to reserve? When do I need a new gas cylinder? Questions such as this one are often asked by campers when using a two-cylinder system in a caravan or motor caravan.

A remote display, such as the Caramatic TwoControl from GOK or the DuoC from Truma, ensures greater clarity and convenience when it comes to mobile LPG management. Campers can see at a glance whether the automatic changeover valve has already switched to the reserve cylinder.

So far, so good. But what happens when the changeover valve, as the sole component or as part of a pressure regulation system (e.g. with crash sensor), is due for replacement after ten years? And what about switching from an older, silver-coloured Truma DuoControl CS to the Caramatic DriveTwo from GOK.

For most applications, there is a simple solution for enabling continued use of the remote display, which does not have to be replaced.

Date of manufacture of GOK Caramatic DriveTwo, ProTwo or SwitchTwo: up to 09/2022

The following applies for campers who have purchased a GOK Caramatic DriveTwo, ProTwo or SwitchTwo with a date of manufacture up to 09/2022:

• Remote display GOK Caramatic TwoControl can be used without issue
• Remote display Truma DuoC can be used without issue

Date of manufacture of GOK Caramatic DriveTwo, ProTwo or SwitchTwo: from 10/2022

The following applies for campers who have purchased a GOK Caramatic DriveTwo, ProTwo or SwitchTwo with a date of manufacture 10/2022 or later:

• Remote display GOK Caramatic TwoControl can be used, but…
• Remote display Truma DuoC can be used, but…

In 2022, we revised the visual indicators (red/green display) of the DriveTwo, ProTwo and SwitchTwo. Campers have to complete a few steps to continue to use their installed remote displays such as the GOK Caramatic TwoControl or Truma DuoC.

What to do if the date of manufacture is 09/2022 or earlier?

This is the simplest case for campers, because they essentially have to do nothing at all. Simply install the existing remote display transmitter on the new fitting and the system will continue to function as usual.

If you are not sure of the exact date of manufacture, the following image provides some help:

What to do if the date of manufacture is 10/2022 or later?

Option 1:

GOK Caramatic DriveTwo, SwitchTwo, ProTwo & GOK Caramatic TwoControl remote display

In principle, the new Caramatic DriveTwo, ProTwo or SwitchTwo models are fully compatible with an existing Caramatic TwoControl remote display. Operators only need to complete a few simple steps to ensure a correct display on the control panel.

For orientation purposes, the general system layout is shown in the following figure. The remote display transmitter (A) sits directly on the pressure regulation system or the changeover valve. The distance between the remote display transmitter (A) and the connection point (B) to the display is approximately two metres (2 m).

 

 

After locating the connection point (1), disconnect the cable (2) and connect the adapter cable (3 + 4) in between as shown. The adapter cable is supplied with the GOK products specified above.

That’s it! Now the operator can once again enjoy the comfort and convenience of the Caramatic TwoControl remote display.

Option 2:

GOK Caramatic DriveTwo, SwitchTwo, ProTwo & Truma DuoC remote display

Method 1: If you simply place the existing remote display transmitter back on the visual indicator, you will also receive a display on the control panel of the Truma DuoC. However, the display is now reversed:

• • If the green LED is lit, one of the two gas cylinders is empty.
  • If the red LED is lit, both gas cylinders are not empty.

If this acceptable to you, no further steps are necessary.

Method 2: The adapter cable supplied with the DriveTwo, SwitchTwo or ProTwo models can be adapted in just a few steps to obtain the normal display on the Truma DuoC remote display. Here’s how:

The right side of the adapter cable remains unchanged. Use a pointed object (e.g. a needle or paper clip) to carefully push out the pink wire from the lower connector (2) on the left side of the cable (the side with the larger connector; number 1 in the figure). Then insert this wire into the upper free connector (3).

Then proceed in the same way as in option 1. If you are not confident about modifying the adapter cable, send us an e-mail to info@gok.de with the subject “Adapter cable for Truma DuoC remote display”. You will then receive a modified adapter cable from us, which you simply need to insert at the connection point.

Method 3: If the cable connection point, as described under option 1, is not accessible, the pink and yellow wires can also be swapped over directly on the control panel of the Truma DuoC. Proceed as follows:

• • Dismount the Truma DuoC control panel from the wall and remove the cover from the back. You will see a 10-pin header at the rear of the control panel (1).
  • Cut the pink and yellow wires and strip the ends (2).
  • Use a connector terminal to join the pink wire coming from the pin header to the yellow wire leading to the cylinder cabinet (3).
  • Use a connector terminal to join the yellow wire coming from the pin header to the pink wire leading to the cylinder cabinet (3).
  • Reinstall the control panel of the Truma DuoC.

Option 3:

GOK Caramatic DriveTwo, SwitchTwo, ProTwo & remote display from another manufacturer

If the existing remote display is not the Caramatic TwoControl from GOK or the Truma DuoC, there are two possibilities:

Method 1: If the existing remote display transmitter fits and you do nothing else, the display is reversed and information is not provided in the usual manner, e.g.:

• • Message “One gas cylinder empty” means: “Both gas cylinders not empty”
  • Message “Both gas cylinders not empty” means: “One gas cylinder empty”

Once again, if this situation is acceptable to you, no further steps are necessary.

Method 2: As with the previous methods, the wiring needs to be changed slightly in this case.

The operator needs to locate the cable connection point (1) between the remote display transmitter and the control panel (approximately two metres from the remote display transmitter). Next, the yellow and pink wires of the cable leading to the remote display transmitter must be cut (2) and the ends to be connected (pink wire from the remote display transmitter, yellow wire from the connection point) must be stripped.

Finally, the pink wire coming from the transmitter is connected to the yellow wire leading to the connection point (3) and the remote display once again functions as before.

Where do I get the adapter cable?

The adapter cable described above has been included with the Caramatic DriveTwo, SwitchTwo and ProTwo models for quite some time. Therefore, please check the packaging first. If you nevertheless do not have an adapter cable but would like to perform this conversion, you can contact us directly. Please send an e-mail with the request “Adapter cable for remote display” to the following e-mail address: info@gok.de.

Important general note on electrical connections

During all of the assembly and installation work described above, you must bear in mind that electrical connections in the gas cylinder cabinets of the camping vehicle are strictly prohibited. Therefore, please ensure that no electrical connections, such as the connection points of the adapter cable, are located in the gas cylinder cabinet after the conversion work.

Please also be aware that assembly work – especially on electrical connections – must be carried out by specialist personnel, as described in the respective assembly and operating manuals.