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Hot Water Boiler with Steel Body, Automatic Fuel Feed Operation and Maintenance Manual
Example: If the boiler with 80.000 kcal / h capacity is to be operated with closed expansion system; 3
bar, safety valve must be used. The building to which this boiler is connected should be installed with
80 liters in 4 floors and 100 liters closed expansion in 5 floors.
Wiring diagram with closed expansion tank
Open expansion tank systems:
At the top of the system, the roof is put on the level difference and works open to the atmosphere.
An expansion tank is placed at a slightly higher point than the highest point of the dispensing system
to collect the expanded water volume. The water that expands in the boiler is stored in the
expansion tank by means of a travel safety pipe. When the water in the installation is cooled, the
water of the installation is completed by the expansion tank by means of the return safety pipe. As
the expansion tank also opens the system to the atmosphere, it ensures the safety of the system by
preventing the pressure in the heating installation to rise above atmospheric pressure. The venting
pipes are opened from the expansion tank to the atmosphere and the air in the system is discharged.
It is recommended to use separate expansion tanks according to their capacities for each boiler in
the installation. That is, it is not correct to connect the two boilers to a single expansion tank. There
are return and return safety pipes for each boiler and expansion tank. Valves, check valves etc. on
these safety pipes. No fittings such as material should not be installed. Safety pipes must reach the
