1. This electrothermal element installed position contact surface should be smooth and non-convex phenomenon. 2. This heating element should be dried to avoid soaking in water to affect its insulation performance. 3. Installation should first check the installation location and the specifications of the electrical components are consistent, the use of the voltage is consistency. 4. After installation, the internal six foot bolts should be inspected again, the wiring seat bolt and the wiring bolt are locked tightly, lest the thermal contraction affect the life span of the product. 5. Should be used under the specified voltage.