Vernet Thermocontact Fan 92 °C / 82 °C – M22x150

The Calorstat by Vernet 92 °C / 82 °C thermocontact fan with an M22x150 thread activates the cooling fan when the temperature reaches 92 °C, then shuts it off when the temperature drops back down to 82 °C at the thermocontact.

These temperatures are fixed and cannot be adjusted. The 10 °C difference between activation and deactivation—known as hysteresis—limits repeated cycling when the temperature fluctuates around the activation threshold.

Selecting the Appropriate Temperatures for the Engine

Each engine has an optimal operating temperature range defined by its manufacturer. The choice of thermocontact must meet the engine’s requirements and be consistent with the thermostat, the radiator, and the location of the thermocontact within the cooling system. An earlier fan activation is not always beneficial.

The thresholds of 92 °C for activation and 82 °C for deactivation correspond to the temperature at the thermocontact. These thresholds alone do not define the engine’s optimal temperature and should not be confused with the thermostat’s opening temperature, which regulates the flow of cooling fluid.

Mounting Tips for the Calorstat by Vernet Thermocontact

Use a cooling hose adapter with an M22x150 thread, suitable for the hose’s inner diameter, or use an available location with the same thread on the cooling system. The sensor element of the thermocontact must be in contact with the cooling fluid. Check the available space and ensure a proper seal for the mounting.

Installation with a relay: The thermocontact must be connected to the control circuit of a relay, not to the power circuit. It controls the relay coil, while the relay’s power contacts supply power to the fan. Do not power the fan motor directly through the thermocontact.

Use a relay, a protective fuse, and cables with a cross-sectional area suitable for the fan’s consumption, taking its starting current into account. Follow the wiring diagrams for the relay and the vehicle.

Technical Specifications of the Calorstat by Vernet Thermocontact

• Brand: Calorstat by Vernet.
• Manufacturer part number: TS1151.
• Product type: cooling fan thermocontact.
• Activation temperature: 92 °C.
• Shut-off temperature: 82 °C.
• Temperature settings: fixed thresholds, not adjustable.
• Switching hysteresis: 10 °C.
• Thread: M22x150, corresponding to a nominal diameter of 22 mm and a pitch of 1.5 mm.
• Mounting: on a hose adapter or any available location with an M22x150 threaded hole.
• Electrical connection: relay control circuit; direct power supply to the fan is prohibited.

Key features of the Calorstat by Vernet thermocontact

• Automatic fan activation and shutdown based on temperature.
• Separate thresholds to limit frequent switching.
• Fixed calibration requiring no temperature adjustment.