Lauda M Operating instructions

Hello! I'm your chat assistant and I'm ready to help you with your questions regarding the LAUDA thermostats. This document provides operating instructions for the immersion thermostats T and B and the compact thermostats Series T and B M 3, M 12, M 20, and M 25. The document details safety procedures, installation instructions, and operational guidelines for these devices. The manual emphasizes the use of non-flammable liquids and discusses the safety features, including over-temperature and low-level protection. I'm ready to answer your questions!
What type of liquid can I use in the thermostat?

What should I do if the red fault lamp lights up?

How do I connect an external system?

How do I set the temperature on a B-unit?