Vaillant VRC 630, Operating Manual

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60
Installation Instructions VRC 630 0020095108_00
7 Operating the controller
Settable
parameters
Description
Setting
range Default
setting
Room thermostat
control Requirement: the controller is wall-mounted or the VR 90 remote
control unit is connected
Determines whether the temperature sensor in the controller or in
the remote control unit is used.
None
Temperature sensor is not used for control
Thermostatic control
The built-in temperature sensor measures the current room tempe-
rature in the reference room. This value is compared with the tar-
get room temperature and, if there is a difference, results in
adjustment of the heating flow temperature by means of the so-
called "Effective target room temperature".
Effective target room temperature = set target room temp. + (set
target room temp - measured room temp.)
The effective target room temperature is then used for controlling
instead of the set target room temperature.
Thermostat
Same as thermostatic control, however the heating circuit is also
switched off when the measured room temperature is greater than
the set target room tempe 3/16°C.
When the room temperature falls 4/16°C below the set target room
temperature again, the heating circuit is switched on again.
The use of room thermostat control, in combination with careful
selection of the heating curve, leads to optimum control of the hea-
ting installation.
–
–
–
–
–
–
–
–
–
none/
room
temp./
thermos-
tat n/a
Remote control Indicates whether a remote control unit is configured
Cannot be set –
– Yes/No –
Target flow temp. Displays the flow temperature for the heating circuit calculated by
the controller on the basis of the specified parameters – – –
Current flow temp. Displays the actual flow temperature of the heating circuit – – –
Fixed value day Mixer circuit is controlled at the daytime fixed value – 5 ...90° C 65°C
Fixed value night Mixer circuit is controlled at the night time fixed value – 5 ...90° C 65°C
Pump delay time Every 15 minutes, each circuit is checked to see whether the
measured flow temperature is 2K above the calculated target value. If
this happens three times in succession, the pump in the affected cir-
cuit is switched for the set time. The mixer remains in its current posi-
tion – 0 ... 30
min 0 min
Cylinder ACT Displays the current cylinder temperature (hot water temperature);
(cannot be set) –
Status load pump Status of the charging pump (cannot be set) – On/Off
Return temperature Target temperature of the mixer circuit when used for return tempe-
rature control – 15 ...60° C 30 °C
Return temperature
ACTUAL Measured return temperature –
Table 7.9 Settable parameters in Menu C2 (continued)