When the boiler is not hot and the cause is not related to the package or the engine of the building, or when half of the boiler is cold and the other half is hot, the radiator is ventilated. You have to ventilate it. To drain the air trapped inside the piping network and radiators, turn off the circulator pump and use the radiator vent valve to empty the air inside. Ventilation valves are available in two types, manual and automatic.

پشتیبانی و خدمات دهی نوین امداد با سال سابقه کار از معتبرترین و باکیفیت ترین تعمیرات محصولات لوازم خانگی را بر عهده دارد . این مرکز با داشتن متخصص‌ترین و با سابقه ترین تعمیرکاران توانسته است. گام به گام با فناوری روز دنیا کار سرویس و تعمیرات را داشته باشد.

معتبرترین و باکیفیت ترین محصولات لوازم خانگی را بر عهده دارد . این مرکز با داشتن متخصص‌ترین و با سابقه ترین تعمیرکاران توانسته است. گام به گام با فناوری روز دنیا کار سرویس و تعمیراترا درتهران ، پردیس ، لواسان، رودهن ، دماوند ، پرند ، اسلام شهر ، پاکدشت ، رباط کریم، نوشهر  عهده‌دار شود.

In fact, it is a special elbow that is installed on the return pipe of the radiator, this part is used to balance the system artificially, it is also used when removing the radiator. The structure of the locking knee is similar to a radiator valve, and on one side it has a tube-shaped nut that is mounted on the radiator, and on the other side, which has a gear-like position on the inside, it is placed on the radiator outlet pipe.

Winter mode: the boiler provides hot water for central heating system in the winter season. When the hot water tap is opened, the flow switch is activated by the flow of water through the switch, and by sending the command to the electronic control board, the central heating circuit is temporarily cut off and the capacity of the device is fully utilized to supply the hot water consumed. Immediately after the hot water tap is closed, the central heating circuit automatically switches ON and directs hot water to the radiators.