Vaillant VRC 630, Operating Manual

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To operate them more conveniently, remote control
devices can be connected for the first eight heating cir-
cuits.
Each mixer circuit can, as required, be switched
between:
Heating circuit (radiator circuit, underfloor circuit,
etc.)
Fixed value control,
Return flow boost,
Hot water circuit (in addition to integrated hot water
circuit).
Several modulating Vaillant boilers or one and two-
stage heating appliances can be connected using modu-
lating bus couplers (accessory).
The maximum number of boilers/heating appliances
that can be connected depends on the bus coupler
installed.
Bus coupler Maximum number of boilers/heating appli-
ances
that can be connected
VR 30, VR 32 8
VR 31 6
Table 3.1 Maximum number of boilers/heating appliances that
can be connected
With the remote telephone contact connection (floating
contact input), the operating mode of the controller can
be changed from any location by telephone via the tele-
SWITCH telephone remote control switch.
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3.2 Overview of functions
The controller provides the following options for con-
trolling your heating installation and hot water genera-
tion:
Off
Heating installation switched off or hot water genera-
tion with active frost protection
One-time Cylinder Charging
Allows the DHW cylinder to charge up once, indepen-
dently of the current timer programme
Holiday function / Holiday programme
Independent control of the room temperature during
your absence;
only in the
Auto and Eco modes
Frost protection function
Protection from frost damage in the Off and Eco modes
(outside the time slots);
The boiler must remain switched on
Heating curve
The basis of weather compensation; improves the mat-
ching of the heating output to the outside temperatures
Advance function
Allows you to continue the heating and hot water times
beyond the next switch-off time up to the next heating
start
Energy saving function
Allows the target room temperature to be reduced for a
set period
Weather compensation
Automatic changing of the heating water temperature
(flow temperature) depending on the outside tempera-
ture by means of a heating curve
Time slot
Individually settable time settings for the heating instal-
lation, the hot water generation and the operation of a
circulation pump
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Installation Instructions VRC 630 0020095108_00
Equipment and functional description 3