Metal-Fach SEMAX OPTI 16, Руководство по эксплуатации, Страница: 24 / 52

METAL-FACH Heating Technology
22
Requirements for the expansion vessel
(Installer)
Each open system heating installation should be equipped with an expansion vessel , whose task is to take over
the increase in the volume of water filling the installation and to vent it. This vessel should be installed at the
highest point of the installation, possibly in a vertical line above the boiler (s).
The volume of the expansion vessel can be estimated by assuming the unit capacity for one kW of thermal
efficiency is 1-2 dm
3
.
expansion vessel is equipped with a spigot for connecting a safety riser pipe, a safety downpipe and an overflow
pipe and the associated venting.
The diameter of the vent pipe and the overflow pipe must be at least:
[mm]
- boiler capacity [kW]
The most important requirements for safety devices are as follows:

dish the expansion tank should have a volume of about 3.5% of the water volume contained in the
heating system, including the boiler,

each boiler should absolutely have a safety pipe and an overflow pipe,

the installation should be equipped with a signal and expansion pipe as well as a connector for venting
the expansion vessel .
If several boilers are installed, each of them should be equipped with a safety pipe in accordance with the rules
provided in accordance with PN-91 / B02413 - protection of open system water heating. No shut-off valves may
be installed on the safety and overflow pipes, and the pipes and the vessel must be protected against freezing.