Switching On The Product; Filling And Purging The Heating Installation; Filling The Condensate Siphon; Filling The Hot Water Circuit - Vaillant ecoFIT pure 825 Installation And Maintenance Instructions Manual

7.6

Switching on the product

▶
Switch on the product via the main switch installed on-
site.
7.7

Filling and purging the heating installation

Preliminary work
▶
Flush the heating installation through.
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.00.
0020230531_01 ecoFIT pure Installation and maintenance instructions
7.8
1
1.
2.
3.
4.
5.
7.9
1.
2.
3.
7.10
The gas flow rate has been set during production and does
not require adjustment. With the front casing fitted check the
gas flow rate of the boiler as follows:
▶
Start up the product with the check programme P.01.
▶
In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermo-
stat.
▶
Wait at least 5 minutes until the boiler has reached its
operating temperature.
▶
Ensure that all other gas appliances in the property are
turned off.
▶
Measure the gas flow rate at the gas meter.
▶
Compare the measured values with the corresponding
values in the table.

Filling the condensate siphon

2
C
1
Unclip the lower section of the siphon (1) from the up-
per section of the siphon (2).
Remove the float (3).
Fill the lower section of the siphon with water up to 10
mm below the upper edge of the condensate drain pipe-
work.
Re-insert the float (3).
Note
Check that the float is present in the con-
densate siphon.
Clip the lower section of the siphon (1) into the upper
section of the siphon (2).

Filling the hot water circuit

Open the water tap to fill the hot water circuit.
Close the water tap once the appropriate volume of
water has flowed out.
◁
The hot water circuit is filled.
Check all connections and the entire system for leak-
tightness.

Checking the gas flow rate

Start-up 7
B
A
3
17