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We reserve the right to make changes without any prior notice.
Translation from original instructions
Check:
-
that the hydraulic connections have been made properly, according to the instructions given on the inlet / output plates
and that a mechanical filter has been installed at the unit’s inlet (a mandatory component, whose absence will invalidate
the warranty);
- that the hydraulic system has been vented, eliminating any excess air, loading it gradually and opening the venting
devices on the top;
- that the pump has been bled properly;
- that the installer has organised a storage tank with the appropriate capacity for the volume of the system’s water.
7.1.1 Checking the pre-charge of the expansion vessel
The values of the pre-charge pressure and the maximum pressure at which it can operate are stated on the label present
on the expansion vessel.
The pre-charge pressure of the expansion vessel must be adjusted to the hydraulic pressure at the point of installation.
At the time of installing the unit, make sure the pre-charge value is equal to the hydrostatic pressure value at the point of
installation increased by a precautionary pressure value (at least 0.3 bar), to ensure there are no areas under vacuum in
the system.
where
- pVE: new pre-charge pressure of the expansion vessel [barg]
-
Hmax: difference in level between the highest point of use and the installation level of the unit [m]
If the calibration value obtained from the calculation is lower than the pre-charge value stated on the label, keep the existing
pre-charge value.
The maximum value of the pre-charge pressure corresponds to the calibration pressure of the safety valve.
The checking of the pre-charge must be done for each installed vessel