Vaillant VRC 430f Installation Manual download pdf (Page 37)

17Installation Instructions VRC430 0020042468_02

Summer/Winter changeover

In the display 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 default setting is switches off automatic changeo-

ver (Selection: Off).

If the VRC 430 is equipped with the external sensor

VRC 9535 which receives the DCF77 time signal, sum-

mer/winter changeover takes place automatically; in

this case there is no way to switch off the automatic

changeover option (Selection: Off).

Flow temperature

See Heating flow temperature.

Hot water generation

Your boiler heats the water in the domestic hot water

cylinder to the selected target temperature. If the tem-

perature in the domestic hot water cylinder falls by spe-

cific value, the water is heated up again to the target

temperature. Time windows can be programmed for hot

water generation.

Time window

You can specify three time windows per day for heating,

hot water generation and the circulation pump (see op-

erating instructions Section 4.7.1).

Every heating time window is assigned a target value.

The hot water target value is used as a basis for gener-

ating hot water (screen 10 "Hot water parameters").

The time windows specify the time for the circulation

pump.

In automatic mode the system is controlled as per the

specified values in the time windows.

Circulation pump

When you turn on the hot water tap it can take a few

moments - depending upon the length of the pipe - be-

fore hot water comes out. A circulation pump pumps hot

water through the pipes in the hot water circuit. This

ensures that hot water is immediately available when

you turn on the tap. Time windows can be programmed

for the circulation pump.

Appendix

Glossary

1 2 ... 32 33 34 35 36 37 38 39 40

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