COAST 11KW 220V POOL HEATER THERMOSTAT SWIMMING POOL SPA ELECTRIC WATER HEATER PUMP The ST series pool heaters are special used for small pool less than 5CBM, massage pool and hot spring to heat and keep warm; Meanwhile, can be a assistant for heat pump in heating. This product adopts latest constant temperature controller, temperature sensor replaces traditional magnetic flow switch, it improves greatly of trouble free in working time, adaptability of water environment and stability. Important: 1. Read through the manual carefully to know better about the heater’s installation and operation, and check the parameters before installation. 2. Check the circulation system first before turn on the heater. 3. Never disassemble the heater when connecting to power supply. 4. Never turn on the heater without water 5. No power switch is designed for the heater. The front panel switch can only turn off the controller, thus you should cut off the main power supply before performing maintenance or repair. 6. Proper grounding is important. 7. Start the circulation pump for at least 2 minutes before turn on the heater, and turn off the circulation pump at least 2 minutes after turn off the heater. 8. Once unexpected high temperature 60℃（140℉）occurs, the temperature switch cuts off the system. You need to cut off the main power supply, resolve the fault and wait the temperature to fall below normal temperature, then press the ‘Reset’ button to restart the heater. Control system automatically heat-up procedure 1. Preparation stage Once reconnected to power or if the water temperature is 1℃ below the user setting temperature at least 10 minutes after entering the waiting stage, the heater enters the preparation stage.‘PUMP WORKING’indicator lights. If hint message ‘’ does not appear on the panel within 2 minutes, and the water temperature is 1℃ below the user setting temperature after 2 minutes, the heater enters next stage pre-heat stage.