Checking Leak-Tightness; Adapting The Unit To The Heating Installation; Activating Diagnostics Codes; Burner Anti-Cycling Time - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

Note
The actual reading on the digital pressure
gauge should ideally be 0,05 MPa (0,5 bar)
plus an additional pressure corresponding
to the highest point of the system above the
base of the boiler – 10 m head equals an ad-
ditional 1 bar reading on the pressure gauge.
The minimum pressure should not be less
than 0,1 MPa (1 bar) in any installation. If
the system is to be treated with an inhibitor it
should be applied at this stage in accordance
with the manufacturer's instructions
8. Install the front casing.
9.11

Checking leak-tightness

▶
Check the gas pipe, the heating circuit and the hot water
circuit for leak-tightness.
▶
Check that the flue system has been installed correctly.
9.11.1 Checking the heating mode
1. Activate the heating mode on the user interface.
2. Turn all thermostatic valves on the radiators until they
are fully open.
3. Allow the product to operate for at least 15 minutes.
4. Fill and purge the heating installation. (→ Page 29)
5. Call up the status codes. (→ Page 26)
Status codes – Overview (→ Page 49)
◁
If the product is working correctly, the display shows
S.04.
9.11.2 Checking the hot water generation
1. Activate the hot water handling mode on the user
interface.
2. Open a hot water valve completely.
3. Call up the status codes. (→ Page 26)
Status codes – Overview (→ Page 49)
◁
If the product is working correctly, the display shows
S.14.
10 Adapting the unit to the heating
installation
10.1

Activating diagnostics codes

You can find the setting options in the diagnostics codes in
the installer level.
▶
Set a diagnostics code. (→ Page 26)
32
10.2

Burner anti-cycling time

To prevent frequent switching on and off of the burner and
thus prevent energy losses, an electronic restart lockout
is activated for a specific period each time the burner is
switched off. The burner anti-cycling time is only active for
the heating mode. Switching on domestic hot water mode
during the burner anti-cycling time has no effect.
10.2.1 Setting the maximum burner anti-cycling
time
1. Set a diagnostics code. (→ Page 26)
T Set maximum burner anti-cycling time [min]
Flow
(tar-
get)
1
[°C]
30 2.0
35 2.0
40 2.0
45 2.0
50 2.0
55 2.0
60 2.0
65 2.0
70 2.0
75 2.0
Set maximum burner anti-cycling time
T
Flow
[min]
(target)
[°C]
35
30 29.0
35 25.5
40 22.5
45 19.5
50 16.5
55 13.5
60 10.5
65 7.0
70 4.0
75 1.0
2. If required, adjust the maximum burner anti-cycling time
using diagnostics code d.02.
10.2.2 Resetting the remaining burner anti-cycling
time
▶
Press and hold the
seconds.
◁
All symbols are shown in the display.
Installation and maintenance instructions ecoTEC sustain 0020253094_05
5 10 15 20 25
4.0 8.5 12.5 16.5 20.5
4.0 7.5 11.0 15.0 18.5
3.5 6.5 10.0 13.0 16.5
3.0 6.0 8.5 11.5 14.0
3.0 5.0 7.5 9.5 12.0
2.5 4.5 6.0 8.0 10.0
2.0 3.5 5.0 6.0 7.5
1.5 2.5 3.5 4.5 5.5
1.5 2.0 2.5 2.5 3.0
1.0 1.0 1.0 1.0 1.0
40 45 50 55
33.0 37.0 41.0 45.0
29.5 33.0 36.5 40.5
26.0 29.0 32.0 35.5
22.5 25.0 27.5 30.5
18.5 21.0 23.5 25.5
15.0 17.0 19.0 20.5
11.5 13.0 14.5 15.5
8.0 9.0 10.0 11.0
4.5 5.0 5.5 6.0
1.0 1.0 1.0 1.0
button for more than three
30
25.0
22.0
19.5
17.0
14.0
11.5
9.0
6.5
3.5
1.0
60
49.5
44.0
38.5
33.0
28.0
22.5
17.0
11.5
6.5
1.0