Wireless exhaust air control FGS 170

🔧 Technology & function

1. How does the FGS170 set work exactly? The FGS170 set consists of a 230V transmitter (connected to the potential-free contact of the gas boiler) and a 230V receiver. As soon as the gas boiler goes into operation, the transmitter reports this via radio to the receiver, which then interrupts the power supply to the exhaust system. When the heater is off, the exhaust system is released again

2. What happens if the heater ignites while the exhaust air is running? The receiver immediately interrupts the circuit to the exhaust system - so it switches off. This prevents negative pressure from drawing toxic exhaust gases back into the room

3. Is there a special frequency or radio monitoring? Yes, the system works on 868MHz and continuously monitors the radio connection between transmitter and receiver. The typical range is up to 20m in the open field, but can be influenced by walls or shielding

4. Do I need a potential-free contact on the thermal bath? Yes. The sender requires a Normally closed or normally open contact to query the thermal baths. However, many devices only return 230V voltage in the event of a fire - this is sufficient, as an electrician can easily find a suitable 230V relay installed to create the necessary contact

* The transmitter is connected to the potential-free contact (opener) of the gas boiler with a cable. As soon as combustion starts and the contact opens, a receiver is activated via radio, which switches off the exhaust system (e.g. bathroom fan). The receiver can be installed surface-mounted or flush-mounted in a distributor, switch or socket with a minimum diameter of 60 mm. The side fastening tabs on the receiver can be broken away if necessary.

*Make sure that the radio waves are not shielded (wall, metal, etc.), the range depends. from the installation.

🛠️ installation & compatibility

5. Can I connect the FGS170 myself? The transmitter is connected to the contact of the gas boiler, the receiver is in a 230V socket installed (built-in module). You should hire a trained electrician to install the transmitter and receiver in the power supply.

6. Why is a 230V relay sometimes needed? If your gas boiler only has one 230V output, but has no potential-free contact, a 230 V relay can simulate the contact. This relay converts the voltage signal into a potential-free contact - this allows the transmitter to reliably process the thermal message

7. Does the system work with every thermal bath? Yes – as long as the thermal bath provides a suitable contact or a 230 V control. If you are unsure, please ask your installer.

➕ Extensions & Variants

8. Can I connect a second exhaust system? Yes. Use another receiver for this (FGS170-E 300701), the factory set to the same coding (0–9) will be set. Please provide the serial number of your first set when ordering.

🧾 Legal & Security

9. Why do I need exhaust air control for gas boilers? Exhaust air systems create negative pressure. If the heater is burning and the windows for supply are closed, negative pressure can arise - this sucks exhaust gases (e.g. carbon monoxide) back into the room. The FGS170 gas boiler control prevents this by only allowing exhaust air control when the boiler is off

10. Is the FGS170 approved? No, we do not have DIBt certification for this article. Involve your chimney sweep in your planning before installation so that nothing stands in the way of acceptance afterwards. There are clear regional differences on which Elektrotechnik-Schabus has no influence.

🛒 purchase & service

11. What is included? A 230V transmitter and a 230V built-in receiver, a 4m control cable, mounting material and description

12. Are there spare parts? Yes. The receiver can be ordered separately (model FGS170-E item 300701) and is set to your existing coding. For transmitters, relays or supply lines, please contact our support.

13. How long is the guarantee valid? You receive a 2-year warranty in accordance with legal regulations.

14. Who will support me if I have any questions or problems? Our technical support is available by phone or email. You can find the contact details on our website.