7 Commissioning [specialist]
2014/11
99640766x-mub-en – V03
17
7.1
Filling the primary circuit
WARNING
Danger of scalding due to hot water!
The system is under pressure. By opening the pressure relief valve, hot water
with a temperature of up to 90 °C may exit and cause personal injury.
Open the pressure relief valve slowly and with sufficient distance.
If the storage tank is (partly) filled
Primary circuit
1.
Slowly open the ball valves (A) and (H).
2.
Open the check valves (B) and (G) at the
opening mechanism (180°, see page 16).
3.
Fill the storage tank using the already existing fill
valves until an operating pressure of about
1.5 bars* is reached.
Use appropriate water according to VDI 2035 /
ÖNorm H5195-1.
4.
Vent the pipe system at the designated points
on site.
5.
Check the operating pressure of the storage tank
after the venting and increase the pressure
if necessary.
6.
Put the check valves (B) and (G) into operating
position (0°, see page 16).
* 1.5 bars in the primary circuit = recommended minimum value
The pressure also depends on the individual system pressures and on the components of
the heating installation!