Setting The Heating Partial Load; Setting Of Pump Overrun And Pump Operating Mode; Setting Of Maximum Flow Temperature; Setting Of Burner Anti-Cycling Time - Vaillant ecotec plus Installation And Maintenance Instructions Manual

7.2.1

Setting the heating partial load

The output of the boilers is set at 35 kW in the factory.
You can specify a value that corresponds to the kW
output of the boiler under diagnosis point "d. 0".
7.2.2 Setting of pump overrun and pump operating
mode
The pump overrun time for the heating operation is set
at the factory to a value of 5 minutes. It can be adjusted
through a range of 2 – 60 minutes under diagnosis point
"d. 1". Under diagnosis point "d.18", you can set the over-
run behaviour of the pump to a different mode.
Overrun: Once the heating requirement has ended, the
pump runs on for the time specified under "d. 1".
Run on: The pump is switched on if the rotary knob for
setting the heating flow temperature is not at the
left-hand stop and the heat requirement is enabled by
an external controller.
Intermittent: This pump operating mode is useful for
removing residual heat after charging when the heat
demand is extremely low and large temperature spreads
exist between the charging and heating mode target
values. This avoids underheating of the living spaces. In
the event of a heat demand the pump is switched on
every 25 minutes for 5 minutes once the overrun time
has elapsed
7.2.3

Setting of maximum flow temperature

The maximum flow temperature for the heating is set at
the factory to 75 °C. Under diagnosis point "d.71" it can
be set to between 40 and 85 °C.
7.2.4

Setting of burner anti-cycling time

To prevent frequent switching on and off of the burner
(energy loss), an electronic restart lockout is activated
for a specific period each time the burner is switched
off. The burner anti-cycling time can be modified to suit
the conditions of the heating installation.
The burner anti-cycling time is only activated for the
heating operation.
Hot water operation during a burner anti-cycling time
does not affect the timer. The maximum burner
anti-cycling time can be set to a value of between 2 and
60 min under diagnosis point d.2 (factory setting:
20 min). The individual effective anti-cycling time is
calculated from the current target flow temperature and
the set maximum burner anti-cycling time.
The timer can be reset or cancelled by pressing the fault
clearance key and also by activating summer mode for a
short time (by briefly turning the nominal flow
potentiometer to the left-hand stop then back to the
starting position). The remaining burner anti-cycling
time following a regular shutdown in heating mode can
be called up under diagnosis point "d.67".
Installation and maintenance instructions ecoTEC plus 0020214490_00
Adapting the boiler to the heating installation 7
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