Vaillant ecoTEC VU 656/4, Инструкция по установке и обслуживанию

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Installation and maintenance instructions ecoTEC 0020029173_01
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
overrun 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
differences 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 blocking 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 locking time can be modified to suit the
conditions of the heating installation.
The burner blocking time is only activated for the
heating operation.
Hot water operation during a burner blocking time does
not affect the timer. The maximum burner locking 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 blocking time is calculated from the
current target flow temperature and the set maximum
burner blocking 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 locking time
following a regular shutdown in heating mode can be
called up under diagnosis point "d.67".
Adapting the boiler to the heating system 7