Vaillant ecoTEC plus VU GB 656/4-5 A Installation And Maintenance Instructions Manual - page 18
6 Start-up
18
Installation and maintenance instructions ecoTEC plus 0020214491_01
– Fernox F2
– Sentinel X 100
– Sentinel X 200
Additives for frost protection intended to remain
permanently in the system
– Adey MC ZERO
– Fernox Antifreeze Alphi 11
– Sentinel X 500
▶
If you have used the above-mentioned additives, inform
the operator about the measures that are required.
▶
Inform the operator about the measures required for frost
protection.
6.5
Reading off the filling pressure
1
2
The product has an analogue pressure gauge (1) and a di-
gital pressure display.
▶
To read off the digital value, press
(2).
If the heating installation is full, the indicator on the pressure
gauge must point to the upper half of the grey area when the
heating installation is cold in order to ensure that it operates
smoothly. This corresponds to a filling pressure 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.
6.6
Reading off the filling pressure
The product comes with a digital pressure indicator.
▶
To read off the digital value for the filling pressure, press
the
button briefly.
◁
The display will show the filling pressure for approx-
imately 5 seconds.
If the heating installation is full, the filling pressure must be
between 0.1 MPa and 0.2 MPa (1.0 bar and 2.0 bar) to en-
sure it operates properly.
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering
the heating installation.
6.7
Preventing low water pressure
To prevent damage to the heating installation that is caused
by low filling pressure, the product is fitted with a water
pressure sensor. If the filling pressure falls below 0.06 MPa
(0.6 bar), the product indicates low pressure by displaying a
flashing pressure value. If the filling pressure falls below 0.03
MPa (0.3 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 on the display until a pressure of
0.11 MPa (1.1 bar) or higher has been reached.
▶
If you notice frequent losses in pressure, determine and
eliminate the cause.
6.8
Filling and purging the heating installation
1
1.
Flush the heating installation thoroughly before filling it.
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.
Observe the information on the topic of treating
(→ Page 17) heating water.
4.
Connect the filling and drainage tap in the heating in-
stallation to a heating water supply in accordance with
the relevant standards.
5.
Open the heating water supply.
6.
Open all thermostatic radiator valves.
7.
If necessary, check that both service valves on the
product are open.
8.
Slowly open the filling and drainage tap so that the wa-
ter flows into the heating installation.
9.
Purge the lowest radiator until water flows out of the
purging valve without bubbles.
10. Purge all other radiators until the heating installation is
completely filled with water.
11. Close all purging valves.
12. Monitor the rising filling pressure in the heating installa-
tion.
13. Fill with water until the required filling pressure is
reached.
14. Close the filling and drainage tap and the heating water
supply.
15. Check all connections and the entire system for leaks.
16. To purge the heating installation, select the check pro-
gramme P.0.
◁
The product does not start up, the internal pump
operates intermittently and purges either the heating