As a control valve and a temperature valve, when the temperature of the medium is lower than 0℃, a heater needs to be installed in front of the electric two-way valve to prevent the electric two-way valve from freezing and cracking;
If working in a heating system, it is best to install the electric two-way valve in the return water circuit, because the return water temperature is relatively low, and the service life of the washers in the electric two-way valve will be longer;
In order to ensure the reliability of the use of the electric two-way valve, it is recommended that the medium flowing through the valve be treated with water quality;
When the valve is installed in a horizontal pipe, the angle between the installation position and the vertical plane shall not exceed 85°;
拨动手动操作杆时应尽量缓慢移动，当手动杆沿箭头指向慢慢移动并按进缺口内卡住，阀门处于常开状态，每当电流首次通过电动阀时，手动杆会再设定至自动位置。
红线为220V火线（L）直接接入温控器火线接口；
蓝线为零线(N)，盘管、二通阀、温控器串联；
Green, brown, yellow, and corresponding temperature controllers are connected to the high, medium and low levels of fan coil units respectively;
The black line in the figure is the "open" interface between the two-way valve's live wire and the thermostat;
The control line is a national standard line of 6 colors and 1.0 square meters.
