Installation requirements: 1. There is a place, which has suitable area and can get enough sunshine. 2. Such place must meet some loading conditions. (Average loading is 200kg/square meter) 3. Heating tank must have special tank place or equipping basis, which has some loading ability. 4. System pressure is ordinary, water pressure on roof is not lower than 0.1Mpa (1kg/square centimeter) 5. In order to get hot water at any time, we suggest you'd better combine with regular resource, such as oil fire, gas fire or electric fine. When the sunlight is not enough, we may use auxiliary heating system, controlling parts start auxiliary heating equipment automatically to raise the water temperature in tank when the temperature is lower than fixed temperature at fixed time. When water temperature arrives at fixed temperature, it will stop heating automatically. Also such system has the lowest water level, so it may ensure not to dry burning or avoid stopping supplying water at busiest time. Such two equipments can ensure heating system to supply lasting constant water (Thinking about the power when using electricity or the safety protection steps when using oil and gas). Regular Maintenance Items 1. You must often check and make record, so that you may supply examined data. 2. You must do some regular cleaning according to your own surroundings so you get the best heating effect. 3. You must wipe off the scale in system regularly by way of your own water quality and system. 4. You must make antirust repair of steel construction in system according to your own natural conditions. 5. You must check the pipe routine's insulating layer in system before winter. 6. You have to change leakage of oil or destroyed evacuated collector heaters on time.