Note: When you make order of pool heater(spa heater),please leave massage about the pipe connection diameter you need:48mm or 50mm? or we will send 48mm. Thank you! Specification: Operating: touch screen Storage / Tankless: Storage Voltage (V): 220V Capacity: less than 2640 gallon of water/10CBMFunction: Wet Steam Feature: Computer Control Panel Power: 15kw Advantages: A. Manual reset temperature control switch Once unexpected high temperature 60 degrees occurs, the temperature switch cuts off the system. B.Unique control system ST and PHS are the newest generation with our unique control system. With this advanced control system, the traditional mechanical water flow sensor is replaced by modern digital temperature sensor, and the features of the temperature C. Sensor technique are: a,The flow-temperature sensor is always under the control of software, accurately monitoring the temperature status of the whole system, and then adjust the settings to maintain the water temperature and protect the heater from unexpected situations. b,No mechanical sensors, avoid any mechanical failure to affect the function of the heater. c,Avoid affection of ion accumulation to mechanical sensors. d,Greatly reduce unnecessary circulation cycles, prolong the life of circulation pumps and save more energy. 2. Intelligent self-diagnose function The control system keeps on monitoring the running status of every parts of the heater, and quickly reacts and displays corresponding hint message for any incident, so as to avoid any damage or malfunction happens. If any fault happens, the heater is stopped immediately, and corresponding hint message will display on the panel for user or technician to decide where the fault is. The safety of customer is the top priority.