Vaillant sensoCOMFORT VRC 720/3 Operating And Installation Instruction Download

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0020334316_02 Operating and installation instructions

Dew point offset: K

Safety margin that is added to the current dew point. Prerequisite:

–

The

Cooling possible:

function has been activated.

–

The

Dew point monitoring:

function has been activated.

Factory setting: 2 K

Ext. heat demand:

Display showing whether a heat demand is present at an external
input.
When installing an FM5 or FM3 functional module, external inputs
are available, depending on the configuration. You can connect an
external zone controller, for example, to this external input.

DHW temperature: °C

Desired temperature of the domestic hot water cylinder. The heat-
ing circuit is used as a domestic hot water circuit.

Actual cylinder temperature: °C

Current temperature in the domestic hot water cylinder.

Pump status:

Display of the current control command at the heating pump.

Mixing valve status: %

Display of the current control command at the mixing circuit.

Zone

Zone activated:

Deactivate zones that are not required. All existing zones appear
in the display. Prerequisite: The existing heating circuits are activ-
ated in the

Circuit type:

function.

Factory setting:

Yes

Zone assignment:

Assign the system control and/or remote control to the selected
zone. The system control and/or remote control must be installed
in the selected zone. The control system also uses the room tem-
perature sensor for the assigned unit. The remote control uses all
of the values for the assigned zone. The

Room temp. mod.:

func-

tion is ineffective if you have not assigned any zones.

Zone valve status:

Display of the current control command at the zone valve

DHW

Cylinder:

If there is an existing domestic hot water cylinder, the

Active

set-

ting must be selected.
Factory setting:

Active

Target flow temperature: °C

Target value for the flow temperature during cylinder charging

Cylinder charging pump:

Display of the current control command at the cylinder charging
pump

Circulation pump:

Display of the current control command at the circulation pump

Anti-legio. day:

Define the days on which you want the anti-legionella function to
run. On these days, the water temperature is increased to above
60 °C. The circulation pump is activated. The function ends after
120 minutes at the latest.
If the

Absence

function is activated, the anti-legionella function is

not carried out. As soon as the

Absence

function ends, the anti-

legionella function is carried out.
Heating installations with heat pumps use the back-up boiler for
legionella protection.
Factory setting:

Off

Anti-legio. time:

Define the time at which you want the anti-legionella function to
run.
Factory setting: 04:00

Cylinder charging hysteresis: K

Start of cylinder charging = Desired temperature

–

hysteresis value

Factory setting:

–

5 K for a conventional heat generator

–

7 K for a heat pump

Red. cyl. charging hysteresis: K

Define when cylinder charging should start after a significant draw-
off (e.g. showering).
Start of reduced cylinder charging = Reduced domestic hot water
temperature

–

hysteresis value

Factory setting: 5 K

Min. temp. after 13 hrs: °C

If the cylinder temperature exceeds the set temperature value and
no water has been drawn for 13 hours, cylinder charging starts.
Factory setting: 43 °C

Min. temp. after 24 hrs: °C

If the cylinder temperature exceeds the set temperature value and
no water has been drawn for 24 hours, cylinder charging starts.
Factory setting: 38 °C