Bedienungsanleitung Vaillant VRC 430f (Seite 39 von 40) (Englisch)

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19Installation instructions VRC 430f 0020042470_01

heating flow temperature is adjusted in the event of

deviation.

– Thermostat

The in-built temperature sensor measures the current

room temperature in the reference room. If the meas-

ured value is below the target room temperature the

heating flow temperature is increased and if the value

is above the target room temperature the appliance is

switched off.

The use of the switch-on room temp., in combination

with careful selection of the heating curve, leads to opti-

mum control of the heating system.

Room target temperature

The room target temperature is the temperature that

should prevail in your apartment and is specified at the

controller. Your appliance supplies heat until the interior

temperature matches the room target temperature.

When entering time programmes the room target tem-

perature is also referred to as the comfort temperature.

Set values

Set values are desired values that you specify in the

controller, e.g. the room target temperature or target

temperature for water heating.

Summer/Winter changeover

In the screen

1 "Basic Data" in the menu point "Mode

selection" you can determine whether the changeover

from summer to winter should take place automatically

(Selection: Auto).

The factory setting (as-supplied condition) is for auto-

matic changeover not to take place (Selection: Off).

If the VRC 430f is equipped with the wireless outdoor

sensor VR 21 that receives the radio time signal DCF77,

the summer/winter changeover takes place automatical-

ly; it is not possible to shutdown the automatic

changeover (selection: Off) in this case.

Flow temperature

See Heating flow temperature.

Water heating

The water in the hot water cylinder is heated to the se-

lected target temperature by the appliance. If the tem-

perature in the hot water cylinder falls by a specific

amount the water is heated again until it reaches the

target temperature. Time windows for water heating

can be programmed.

Time window

Three time windows can be programmed per day for the

heating, water heating and circulation pump (see

operating instructions Section 4.7.1).

A target value is allocated to each time window

programmed for the heating.

In the case of water heating the hot water target tem-

perature applies for all time windows (Screen

10 "Hot

water parameters").

In the case of the circulation pump the time windows

determine the operating times.

In automatic mode the system is controlled is in accord-

ance with the specified values in the time windows.

Circulation pump

Depending on the length of the pipe, there may be a

brief delay before hot water flows when the hot water

cock is opened. A circulation pump circulates hot water

via your hot water pipe. This means that hot water is

available instantly when the water cock is opened. Time

windows can be programmed for the circulation pump.

Appendix

Glossary

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