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Installation Instructions VRC 630 0020095108_00
7 Operating the controller
7.3.5 Menu C8: Setting the minimum temperature
Heating appliance
C8
Parameters
Switching hysteresis
8 K
Minimum temperature
15°C
Cylinder starting output
1
>Select temperature
Settable
parameters
Description
Setting
range
Factory
setting
Switching
hysteresis
Only with switching boilers or cascades (switching or modulating)
The boiler or cascade is:
switched on when the low-loss header temperature is 1/3 of the hyste-
resis below the calculated target flow temperature
switched off when the low-loss header temperature is 2/3 of the hyste-
resis above the calculated target flow temperature
Too small a hysteresis can result in constant cycling of the boiler.
–
–
1..20 K
8 K
Minimum
temp.
To protect the boiler from, e.g., corrosion
Corrosion is to be expected if the boiler is permanently operated in the con-
densate range, e.g. due to high water contents
15 ...65° C
15 °C
Cylinder star-
ting output
Only for cascades
Aim of this function is to provide the cylinder charging output quickly.
Defines the number of boiler stages or heating appliances which will be used
to start the cylinder charging
1 ... number
of boilers
1
Table 7.14 Settable parameters in Menu C8
Содержание VRC 630
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