Coasts Swimming Pool and Spa Heater B-M3 2.7-3.3kw. Brand New in Box. DESCRIPTION: This thermostat is designed specifically for the hot tub, the thermostat is installed in the pipeline jacuzzi. When adding hot water bath, start the pump, the thermostat automatically heat insulation work, so the water temperature bath maintained at 39 degrees Celsius, give your Jacuzzi to create a more comfortable environment Note: 1. Do not allow any electrical appliances (such as lights, telephone, hair dryer, radio or television) in the bathtub, "1.5 meters (5 feet) or less. 2. The thermostat should not be used in salt water, acidic water or alkaline water, can not be used in other places chemically corrosive gases or solvents 3.COASTS thermostat outlet to the bath tub in the middle of the pipe or valve or check valve can not be installed Feature: 1.The initial set temperature settings: COASTS equipped with ultra-high temperature protection thermostat switch, thermostat to limit overheating and protect users against danger, however, users should be done after the installation is complete, the first under the premise of safety checks to ensure that the operation of the thermostat's normal function,By using the tub filled with water to a suitable level and start the system automatically checks and let the system run until the thermostat temperature stabilized at the highest level and display lights go out, use an accurate thermometer to measure the water temperature should be at 40 °C 2.COASTS thermostat operation is fully automated, clockwise, the heating is on, indicator light, temperature reaches a preset temperature, will remain at that temperature 3.The thermostat can be maintained within a temperature not exceeding 40 °C (104 °F) range. If cold water is started, will be 6 ~ 8 °C / h elevated temperatures 4.Automatic heating: thermostat will first reach the preset temperature, then stop working until the temperature dropped a few degrees, the thermostat