Vaillant ecoTEC VU User Manual

Adapting the boiler to the heating installation
48 Installation and maintenance instructions ecoTEC 0020173113_01
11
T
Feed
(target)
[°C]
Set maximum burner anti-cycling time [min]
1 5 10 15 20 25 30 35 40 45 50 55 60
20 2.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0
25 2.0 4.5 9.2 14.0 18.5 23.0 27.5 32.0 36.5 41.0 45.0 50.0 54.5
30 2.0 4.0 8.5 12.5 16.5 20.5 25.0 29.0 33.0 37.0 41.0 45.0 49.5
35 2.0 4.0 7.5 11.0 15.0 18.5 22.0 25.5 29.5 33.0 36.5 40.5 44.0
40 2.0 3.5 6.5 10.0 13.0 16.5 19.5 22.5 26.0 29.0 32.0 35.5 38.5
45 2.0 3.0 6.0 8.5 11.5 14.0 17.0 19.5 22.5 25.0 27.5 30.5 33.0
50 2.0 3.0 5.0 7.5 9.5 12.0 14.0 16.5 18.5 21.0 23.5 25.5 28.0
55 2.0 2.5 4.5 6.0 8.0 10.0 11.5 13.5 15.0 17.0 19.0 20.5 22.5
60 2.0 2.0 3.5 5.0 6.0 7.5 9.0 10.5 11.5 13.0 14.5 15.5 17.0
65 2.0 1.5 2.5 3.5 4.5 5.5 6.5 7.0 8.0 9.0 10.0 11.0 11.5
70 2.0 1.5 2.0 2.5 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
75 2.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
11.2 Effective burner anti-cycling times
11.1.6 Setting the maintenance interval
You can define maintenance intervals for the ecoTEC. After
the set burner operating hours have elapsed, in addition to
the current flow temperature, the maintenance symbol
(open-end spanner) appears in the display and this shows
that the boiler must be serviced. The display on the eBUS
controller (accessory) shows the information "Maintenance"
"MAIN".
Heat demand
Number of
persons
Burner operating hours until the
next inspection/service
(depending on the system type)
5.0 kW
1 - 2
2 - 3
1,050 h
1,150 h
10.0 kW
1 - 2
2 - 3
1,500 h
1,600 h
15.0 kW
2 - 3
3 - 4
1,800 h
1,900 h
20.0 kW
3 - 4
4 - 5
2,600 h
2,700 h
25.0 kW
3 - 4
4 - 6
2,800 h
2,900 h
> 27.0 kW
3 - 4
4 - 6
3,000 h
3,000 h
11.3 Guideline values for operating hours
> Set the operating hours until the next service using diag-
nosis code "d.084".
Guideline values for the setting can be found in
¬ table 11.3. The values stated correspond to an average
boiler operating time of one year.
You can set the operating hours in increments of ten from
0 to 3,000 h.
If you do not enter a figure under diagnosis code "D.084"
but instead enter the symbol "–", then the "Maintenance
display" function is not active.
i
On completion of the set operating hours, you
must set the maintenance interval again in diag-
nosis mode.
11.1.7 Setting the by-pass valve
The boilers have a by-pass valve.
The pressure is adjustable in the range between 17.0 MPa
(170 mbar) and 35.0 MPa (350 mbar). Approx. 25.0 MPa
(250 mbar) is pre-set (mid-position). The pressure changes
by approx. 1.0 MPa (10 mbar) each time the adjusting screw
is rotated. By turning right, the pressure increases and turn-
ing left decreases it.
1
11.1 Setting the by-pass valve

Vaillant ecoTEC VU Specifications

General

Brand	Vaillant
Model	ecoTEC VU
Category	Boiler
Language	English