DE DIETRICH INNOVENS MCA 25_28 BIC - Manual (Page 29)

6. Open the disconnector valves.
7. Close the disconnector valves when the manometer indicates a
pressure of 2 bar.
When water is added, air gets into the heating system.
Degas the installation. After the air has been vented, the
water pressure can drop below the required level. Check
the water pressure in the heating system. If the water
pressure is lower than 0,8 bar, more water should be
added.
8. After filling the installation, switch the boiler on.
Filling and bleeding the installation 2 times a year should
be sufficient to obtain an adequate hydraulic pressure. If it
is often necessary to top up the installation with water,
contact your fitter.
5.4 Bleeding the heating system
It is essential that you bleed any air in the calorifier, the conduits or
the taps to prevent the annoying noises likely to be produced during
heating or when tapping water. To do this, proceed as follows:
1. Open the valves on all radiators connected to the heating system.
2. Set the heating set point to as high a temperature as possible.
3. Wait until the radiators are hot.
4. Switch the boiler off.
T001618-A
1
2
T001619-A
2
1
2 bar
1 2
3
4
T000181-B
T000184-A
MCA 25/28 BIC 5. Checking and maintenance
31/08/2011 - 300024163-001-B 28