Fu kang nuan feng Guan

The first floor is wrong. Antifreeze should be changed every two years. Its shelf life is two years.

Do not add water in summer. The temperature is already very high, it is easy to boil, and the consumption of water is also great.

Who wants to drain the water from the left bottom? Use siphon method. Unscrew the waterproof switch counterclockwise. Don't open the water tank cover yet. Open the bleed screw of the warm water pipe, then open the cylinder above the thermostat, and let go of the screw and the bleed switch on the left side of the water tank. Finally, open the water tank cover to complete the drainage.

Screw on the air bleed screw, and screw on the air bleed screw if water overflows from the air outlet on the left side of the water tank. Keep adding water. The waste screw on the thermostat overflowed with water. Tighten the waste screws. Finally, find a coke bottle, cut off the bottom of the coke bottle, press the water inlet of the water tank and continue to add water until water overflows from the outlet of the warm air pipe. Don't unscrew the screw at this time, wait for a while and there will be no bubbles. The water column is tightened and the abandoned screws are exhausted. Just close the water tank cover.