Vaillant VRC 630, Operating Manual

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Installation Instructions VRC 630 0020095108_00
7 Operating the controller
7.3.3 Menu C4: Setting the parameters for the
cylinder charging circuit
a
Danger!
Risk of being scalded by hot water!
There is a danger of scalding at the hot water
draw-off points when the temperatures are in
excess of 60 °C. Young children and elderly
persons are particularly at risk, even at lower
temperatures. When the anti-Legionella func-
tion is active, the DHW cylinder is heated to
over 65 °C for at least one hour.
Make the owner aware that the anti-Legio-
nella function is active.
Cylinder charging circuits C4
Parameters
Load pump overrun
5 mins
Parallel charging Off
> Set duration
Settable
parameters
Description Setting range
Factory
setting
Charging pump
overrun
(overrun not
available in con-
junction with VIH-
RL) The high flow temperatures required for cylinder charging conti-
nue to be delivered to the cylinder as far as possible by means of
the
charging pump overrun before the heating circuits, the direct
circuit in particular, are enabled again.
The boiler switches off when cylinder charging ends (hot water
temperature reached). The
cylinder charging pump overrun
begins and switches off again automatically after the set time.
–
–
0 ... 15 min 5 min
Parallel charging Parallel charging is applicable to all connected mixer circuits.
When parallel charging is enabled, the mixer circuit continues to
be supplied while the cylinder is being heated. This means: As long
as there is still a heat demand in the particular heating circuits,
the pumps in the mixer circuits will not be switched off.
HK1 is always switched off during cylinder charging.
The target flow temperature of the system corresponds to the
highest target flow temperature of all the circuits.
If, for example, a fixed-value circuit at 90 °C is active during cylin-
der charging, the target flow temperature is 90 °C.
–
–
–
–
OFF/ON Off
Table 7.12 Settable parameters in Menu C4
>