Preventing Low Water Pressure; Flushing The Heating Installation For The First Time ("Cold"); Filling The Heating Installation - Vaillant ecoTEC pro 24 Installation And Maintenance Instructions Manual

Additives for cleaning measures (subsequent
flushing required)
–
Adey MC3+
–
Adey MC5
–
Fernox F3
–
Sentinel X 300
–
Sentinel X 400
Additives intended to remain permanently in the
installation
–
Adey MC1+
–
Fernox F1
–
Fernox F2
–
Sentinel X 100
–
Sentinel X 200
Additives for frost protection intended to remain
permanently in the installation
–
Adey MC ZERO
–
Fernox Antifreeze Alphi 11
–
Sentinel X 500
▶
If you have used the above-mentioned additives, inform
the end user about the measures that are required.
▶
Inform the end user about the measures required for frost
protection.
7.5

Preventing low water pressure

To ensure that the heating installation operates smoothly,
the indicator on the pressure gauge must point to the upper
half of the grey area or to the middle of the bar graph display
in the display (marked by the dashed limit values) when the
heating installation is cold. This corresponds to a filling pres-
sure of between 0.1 MPa and 0.2 MPa (1.0 bar and 2.0 bar).
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering
the heating installation.
If the filling pressure falls below 0.08 MPa (0.8 bar), the
product indicates low pressure by displaying a flashing
pressure value. If the filling pressure falls below 0.05 MPa
(0.5 bar), the product switches off. The display shows F.22.
▶
Top up the heating water to start the product up again.
The pressure value flashes in the display until a pressure of
0.11 MPa (1.1 bar) or higher has been reached.
7.6 Flushing the heating installation for the first
time ("cold")
Note
The complete heating system must be flushed
at least twice: Once with cold water and once
with hot water in accordance with the following
instructions.
1. Check whether all thermostatic radiator valves and both
service valves on the product are open.
2. Connect a hose to the drain valve that is located at the
lowest position in the heating system.
3. Open the radiator valves and the drain valves so that
the water can drain quickly. Start at the next point in the
system and open the purging valves on the radiators so
that the contaminated water can completely drain.
0020244995_02 ecoTEC pro Installation and maintenance instructions
4. Close the drain cocks.
5. Refill the heating system with water.
6. Check that the expansion relief valve of the heating
system is functioning correctly by turning the handle
on the valve.
7. Check the pressure in the heating system and top up
with water if necessary.
8. Close the filling valve and the cold water valve.
7.7

Filling the heating installation

1. Flush the heating installation through.
2. Undo the cap of the automatic air vent (1) by one to two
rotations and leave it open, as the product purges itself
via the automatic air vent even in continuous mode.
3. Select the check programme P.06.
◁
The diverter valve moves to the mid-position, the
pumps do not run and the product does not switch
to heating mode.
4. Observe the information on treating heating water.
(→ Page 18)
5. Connect the filling and drainage tap in the heating in-
stallation to a heating water supply, if possible with the
cold water valve, in accordance with the relevant stand-
ards.
6. Open the heating water supply.
7. Open all radiator valves (thermostatic radiator valves) of
the heating installation.
8. If necessary, check that both service valves on the
product are open.
9. Slowly open the filling and drainage tap so that the wa-
ter flows into the heating system.
10. Purge the lowest radiator until water flows out of the
purging valve without bubbles.
11. Purge all other radiators until the entire heating system
has been filled with water.
12. Close all purging valves.
13. Monitor the rising filling pressure in the heating installa-
tion.
14. Fill with water until the required filling pressure is
reached.
15. Close the filling and drainage tap and the cold water
valve.
16. Check all connections and the entire system for leaks.
Start-up 7
1
19