3KW Water Heater for Swimming Pool & Bath SPA

Overview: 3KW water heater designed for pool and spa baths with an ultra-high temperature protection thermostat to prevent overheating and protect users. Initial setup: after installation perform safety checks to confirm the thermostat operates normally. Fill the tub to the correct level and start the unit — it will run an automatic self-check and continue until the thermostat stabilizes at its highest setting and the display lights go out. Verify water temperature with a precise thermometer; the reading should be 40 °C. Operation: the thermostat runs fully automatically. Turn clockwise to switch heating on; the indicator light signals operation. Once the preset temperature is reached the heater will maintain that temperature. Temperature control: the unit keeps temperature from exceeding 40 °C (104 °F). When starting with cold water the temperature will rise at approximately 6 ~ 8 °C/h. Automatic cycling: the thermostat heats to the preset temperature, then stops until the water cools a few degrees, at which point it restarts automatically. Safety cutout: if water temperature climbs above 49 °C the ultra-high temperature switch will trip and cut power automatically.