Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 139

External blocking/mixer CLOSED
Press the following keys:
1. "Device settings".
2. "Programming".
3. "System definition".
4. y/x for "Ext.blocking/
Miclose" (7015).
5. l/m for the selected value.
No. Function of the system components
0 Heating circuits with mixer M2/M3 – control mode
No heat pump blocking
1 Heating circuit with mixer M2 – moves into the CLOSED position
Heating circuit with mixer M3 – control mode
No heat pump blocking
2 Heating circuit with mixer M2 – control mode
Heating circuit with mixer M3 – moves into the CLOSED position
No heat pump blocking
3 Heating circuit with mixer M2/M3 – moves into the CLOSED position
No heat pump blocking
4 Heating circuits with mixer M2/M3 – control mode
Heat pump blocking
5 Heating circuit with mixer M2 – moves into the CLOSED position
Heating circuit with mixer M3 – control mode
Heat pump blocking
6 Heating circuit with mixer M2 – control mode
Heating circuit with mixer M3 – moves into the CLOSED position
Heat pump blocking
7 Heating circuit with mixer M2/M3 – moves into the CLOSED position
Heat pump blocking
System definition control settings
(cont.)
6. "BACK" to confirm.
Delivered condition:
Setting range:
Note
& The parameter "Ext. blocking" takes
higher priority than "Ext. demand".
& See also parameter "Set flow tem-
perature for external demand" on
page 156.
4
0 to 8
139