3KW Electric Water Heater Thermostat for Swimming Pool, Hot Tub & Spa — Fast Heating Bath Pool Equipment

Overview: 3KW electric heater with built-in thermostat designed for swimming pools, hot tubs and spa baths. It features automatic control and multiple safety protections to prevent overheating. Setup & first use: After installation, perform a safety check before operation. With the tub filled to an appropriate level, start the unit so it can run an automatic self-check. Let the system run until the thermostat stabilizes at its highest setting and the display lights go out. Verify the water temperature with an accurate thermometer — it should reach 40 °C. Operation: The thermostat is fully automatic. Turn the control clockwise to switch heating on; an indicator light shows when the element is active. Once the preset temperature is reached the heater will hold that temperature. Temperature behavior: The unit is intended to maintain water at or below 40 °C (104 °F). When starting from cold water, expect the water temperature to rise at approximately 6 ~ 8 °C/h. Safety cutoff: If water temperature exceeds 49 °C, the ultra-high temperature switch will trip and cut power automatically to prevent danger.