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PYROGAS VARINO 65 - 300
We reserve the right to make changes to dimensions and construction 19 Edition 02.09.2015
© Copyright YGNIS AG CH-Ruswil
7. Operating conditions
7.1. Fuel
The PYROGAS VARINO condensing unit is intended for use with gas as specified on the type plate.
Important: The use of other gases such as for instance biogas is not permitted.
7.2. Combustion air
The combustion air should not contain large amounts of dust.
Furthermore, the combustion air must be free of halogens (chlorine and fluorine compounds). An excessive
presence of halogen in the combustion air leads to great corrosion damage. Make sure that no paints, thinners,
cleaning agents, degreasing agents, solvents, chlorine containers, etc. are stored in the boiler room!
7.3. Filling the installation and water quality
The installation must be thoroughly rinsed before it is finally filled.
When filling for the first time and refilling, check the quality of the water in accordance with the values
recommended in chapter 4.2. Poor water quality leads to damage in heating installations from calcification and
corrosion. On the other hand, the service life, functional reliability and efficiency can be increased using
appropriately treated water.
During the filling process, the circulation pumps should be switched off and all ventilating valves opened, so that
the air in the system can completely escape. The filling process is finished when the operating pressure has
been reached.
7.4. Requirements for operation
The maximum operating pressure and the minimum and maximum temperatures to be observed are listed
in chapter 4.1.
Never switch off the mains voltage except for maintenance work on the control panel. The oxygen sensor must
always be heated, even during summer operation (otherwise there is a risk of condensation forming inside the
sensor).
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