Setting The Maintenance Interval; Setting The Pump Output; Setting The By-Pass Valve - Vaillant ecoTEC plus SERIES Installation And Maintenance Instructions Manual

Reset remaining burner anti-cycling time
You have two options to reset the remaining burner anti-
cycling time:
1st option
Menu ¬ Reset burner anti-cycling time
The current burner anti-cycling time appears in the display.
> Confirm the reset of the burner anti-cycling time by
pressing the right selector button
2nd option
> Press the fault clearance key (¬ Operating instructions).
11.1.6

Setting the maintenance interval

You can define maintenance intervals for the ecoTEC plus.
Using this function, the message that the boiler must be
serviced appears in the display after a defined, configurable
number of burner operating hours.
After the expiry of the set burner operating hours, the
maintenance symbol (open-end spanner) appears next to
the current flow temperature. The display on the eBUS con-
troller (accessory) shows the information "Maintenance"
"MAIN".
Number of
Heat demand
persons
1 - 2
5.0 kW
2 - 3
1 - 2
10.0 kW
2 - 3
2 - 3
15.0 kW
3 - 4
3 - 4
20.0 kW
4 - 5
3 - 4
25.0 kW
4 - 6
3 - 4
> 27.0 kW
4 - 6
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 operat-
ing 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.
Installation and maintenance instructions ecoTEC plus 0020116700_01
Adapting the boiler to the heating installation
( "Select").
Burner operating hours until the
next inspection/service
(depending on the system type)
1,050 h
1,150 h
1,500 h
1,600 h
1,800 h
1,900 h
2,600 h
2,700 h
2,800 h
2,900 h
3,000 h
3,000 h
11.1.7

Setting the pump output

The ecoTEC plus boiler is equipped with a 2-stage pump.
The output of the two-stage pump can be adjusted to the
requirements of the heating installation.
> If necessary, change the setting of the pump speed
according to the operating mode under diagnostic point
"D.019" (Setting options ¬ table 11.1).
D.019 Pump operating mode of 2-stage pump, settings:
0 Burner mode stage 2,
pump flow/overrun stage 1
1 Heating mode and pump flow/overrun stage 1,
DHW mode stage 2
2 Automatic heating mode,
pump flow/overrun stage 1,
DHW mode, stage 2
3 Stage 2
4 Rotational speed during heating mode depending on
heating partial load, otherwise always stage 1

11.1.8 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.
11.1 Adjusting the by-pass valve
> Regulate the pressure using the setting screw (1).
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