2. The temperature is different. The big cycle is that after the water temperature reaches a certain temperature, the thermostat automatically opens at a higher temperature. Small circulation is when the water temperature is low.
3. The large cycle is to let the water enter the fan heater and then return to the studio to cool down, and the thermostat is closed when the small cycle works. There is a small tube (return pipe) under the thermostat that does not enter the fan heater circulation, which is called small circulation.
Extended data:
Matters needing attention in waterway construction:
1. Generally, water reform can take the roof or floor according to different places. Hot and cold water outlets must be horizontal, generally hot on the left and cool on the right, and the pipeline laying should be horizontal and firm. The layout should be safe and reasonable. The position of pipe clamp and the slope of pipeline shall meet the specification requirements. All kinds of valves should be installed in correct and upright positions for easy use and maintenance.
2. Inlet water shall be equipped with an indoor master valve. Before installation, check the water pipes and connectors for damage, sand holes and cracks.
3. The installation position of the water meter should be convenient for reading, and the distance between the water meter and the valve and the wall should be appropriate for easy use and maintenance.
4. Such as drinking fountains and water purifiers. If they are all installed in the kitchen, we should consider reserving the location and water source of water supply in advance.
Both cold water pipes and hot water pipes are plugged into the wall. Check the groove depth when slotting, and the hot and cold water pipes cannot be in the same groove.
6. The shower mixing valve is positioned right and left, installed in the middle of the bathtub (determine the size of the bathtub first), and the height is on the bathtub 150-200mm. The outlet of the jacuzzi is reserved according to the model. The hole spacing of the water mixing valve is generally kept at (concealed) 150mm and (exposed) 100 mm, and the outlet position of the connecting rod shower should be determined according to the height of the room and the personal needs of the owner.
References:
Baidu encyclopedia-hydropower transformation