Vaillant VRC 630, Operating Manual

Page: 121 / 152

67
Installation Instructions VRC 630 0020095108_00
Operating the controller 7
Heater C8
Cascading parameters
Switch-on delay
5 min
Switch-off delay 5 mins
> Set time delay
Information Description
Setting
range Factory
setting
Switch-on delay
Switch-off delay Only for cascades
With switch-on delay: Waiting time after switching on a stage or unit
until the next stage is switched on
With switch-off delay: Waiting time after switching off a stage until the
next stage is switched off
Longer waiting times give the system more time to stabilise
If the waiting time is too short, this leads to over or undershooting of
the flow temperature and to continuous cycling of the units in the cas-
cade.
1 ... 90 Min 5 mins
Table 7.14 Settable parameters in Menu C8 (continued)
Heater C8
Information
System set temp.
90°C
Low loss header temp.
ACTUAL
30°C
heating mode status
Boiler sequence 1 2 3 4
Information Description
System set temp. Displays the current system target temperature
Low loss header
temp. ACTUAL
Displays the temperature of sensor VF1 (in the low-loss header)
Status Displays the current status of the heating installation (e.g. heating mode)
Boiler seq
Only for cascades
Displays the current sequence in which the boilers are switched on
Table 7.14 Settable parameters in Menu C8 (continued)