Vaillant sensoCOMFORT VRC 720/3 Operating And Installation Instruction Download

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Operating and installation instructions 0020334316_02

Cylinder charging offset: K

Desired tempe offset = flow temperature for the domestic
hot water cylinder.
Factory setting:

–

25 K for a conventional heat generator

–

10 K for a heat pump

Max. cyl. charging time:

Setting the maximum time at which the domestic hot water cylin-
der can be charged without interruption. If the maximum time or
the target temperature is reached, the system control enables the
heating function. The

Off

setting means that the cylinder charging

time is not restricted.
Factory setting:

–

60 mins for a conventional heat generator

–

90 mins for a heat pump

Cyl. charg. anti-cycl. time: min

Setting the time period during which the cylinder charging is
blocked after the maximum cylinder charging time has elapsed.
During the blocked time, the system control enables the heating
function.
Factory setting: 60 min

Parallel cylinder charging:

When charging the domestic hot water cylinder, the mixing cir-
cuit is heated in parallel. The non-mixed heating circuit is always
switched off during cylinder charging.
Factory setting:

Buffer cylinder

Cylinder temp., top: °C

Actual temperature in the upper section of the buffer cylinder

Cylinder temp., bottom: °C

Actual temperature in the upper section of the buffer cylinder

DHW temp. sensor, top: °C

Actual temperature in the upper part of the domestic hot water
section of the buffer cylinder

DHW temp. sensor, bottom: °C

Actual temperature in the lower part of the domestic hot water sec-
tion of the buffer cylinder

Heating temp. sensor, top: °C

Actual temperature in the upper part of the heating section of the
buffer cylinder

Heating temp. sensor, bottom: °C

Actual temperature in the lower part of the heating section of the
buffer cylinder

Solar cylinder, bottom: °C

Actual temperature in the lower section of the solar cylinder

Max. DHW targ. flow temp.: °C

Setting the maximum buffer cylinder target flow temperature for the
domestic hot water station. The set maximum target flow temperat-
ure must be lower than the maximum flow temperature for the heat
generator.
If the maximum target flow temperature is set too low, the
domestic hot water station cannot reach the target temperature.
While the target temperature is not reached, the system control
does not enable the heat generator for heating mode.
You can find the maximum flow temperature in the installation in-
structions for the heat generator.
Factory setting:

–

80 °C

–

65 °C if basic system diagram 8 is selected

Max. temp. of cylinder 1: °C

Setting the maximum cylinder temperature. The solar circuit stops
the cylinder charging as soon as the maximum cylinder temperat-
ure has been reached.
Factory setting: 75 °C

Solar circuit

Collector temperature: °C

Display of the current temperature at the solar collector

Solar pump:

Display of the current control command at the solar pump

Solar yield sensor: °C

Display of the current temperature at the solar yield sensor

Solar flow rate quantity:

Entering the volume flow to calculate the solar yield. If a solar
pump station is installed, the system control ignores that value that
has been entered and uses the volume flow that is supplied from
the solar pump station.
The value 0 means the automatic recording of the volume flow.
Factory setting:

Auto