Properly installed, the thermostat / thermal link combination type 161 491 may be used for applications where a fixed temperature needs to be monitored or controlled and a maximum temperature must not be exceeded, for example in household appliances such as dishwashers and washing machines, small electrical appliances such as coffeemakers, steam generators, etc. Or in electrically monitored Water heaters.
Structure and Function
A vaulted bimetal disc is used as temperature sensing element in the thermostat. The disc is placed in direct contact with the mounting Plate of the combination therefore reacting quickly to changes in temperature. Upon reaching the preset temperature the bimetal Disc operates and opens the electrical circuit. Upon cooling, the disc snaps back into its original position thereby closing the circuit Again. The switching temperature is freely selectable within a wide range. The thermal link, has a solder insert in the mounting plate which is in direct thermal contact with the surface that is to be monitored. When the preset temperature is reached, the solder melts causing a pin to move which results in the electrical contacts opening. Resetting is not possible. 5 different preset solder temperatures are available. The two components thermostat and thermal link have a common mounting plate, which is responsable for thermal conduction. This Ensures that the thermal information for thermostat and thermal link always comes from exactly the same source.
- Easy mounting - Equal heat transmission - High holding temperature Th - High force to open contact - Rolling contact action - High durability
Several fixing arrangements and terminal Variants are described on the back page.