Vaillant home combi, Installation And Maintenance Instructions Manual

Page: 18 / 52

7 Start-up
18
Installation and maintenance instructions HOME 0020224355_00
7.4 Avoiding danger arising from insufficient
water pressure
The filling pressure must be between 0.10 and 0.15 MPa
(1.0 and 1.5 bar).
Note
If the heating flow temperature is shown in the
display, press and hold the
and buttons
at the same time for longer than five seconds, or
temporarily deactivate heating mode in order to
display the pressure.
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering
the heating installation.
If the water pressure falls below 0.05 MPa (0.5 bar), the
value flashes in the display.
If the water pressure falls below 0.03 MPa (0.3 bar), the
product switches off. The display shows 0.0 MPa (0.0 bar).
Fault F22 will be stored in the fault list.
▶
Top up the water in the heating installation to start up the
product again.
◁
The pressure value flashes in the display until a
pressure of 0.05 MPa (0.5 bar) or higher has been
reached.
7.5 Switching on the product
▶
Switch on the product via the main switch installed on-
site.
7.6 Filling and purging the heating installation
Preliminary work
▶
Flush the heating installation through.
1
1
1. Check the silicone hose connection (1) between the
pump's automatic air vent and the hydraulic console.
2. Remove the caps from the automatic air vents.
3. Fill with water until the required filling pressure is
reached.
–
Recommended filling pressure: 1 … 1.5 bar
◁
The heating and hot water functions cannot be activ-
ated.
◁
The pressure value flashes in the display until a
pressure of 0.05 MPa (0.5 bar) or higher has been
reached.
◁
An automatic air vent function is activated if the
pressure exceeds 0.05 MPa (0.5 bar) for longer than
15 seconds.
4. Purge each radiator until the water escapes normally,
and then retighten the system's purging valves.
5. Check that all connections are leak-tight.
Conditions : If the noise persists in the boiler
▶
Purge the product again by activating check programme
(P.07) and then (P.06) .
Check programmes
–
Overview (
→
Page 30)
7.7 Filling the condensate siphon
C
2
3
1
A
B
1. Unclip the lower section of the siphon (1) from the up-
per section of the siphon (2) .
2. Remove the float (3) .
3. Fill the lower section of the siphon with water up to 10
mm below the upper edge of the condensate drain pipe-
work.
4. Re-insert the float (3) .
Note
Check that the float is present in the con-
densate siphon.
5. Clip the lower section of the siphon (1) into the upper
section of the siphon (2) .
7.8 Filling the hot water circuit
1. Open the water tap to fill the hot water circuit.
2. Close the water tap once the appropriate volume of
water has flowed out.
◁
The hot water circuit is filled.
3. Check all connections and the entire system for leak-
tightness.