External Blocking/Mixer Closed - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

System definition control settings
External demand/mixer OPEN
Delivered condition
Value Function of the system components
Heating circuits with mixer M2/M3 – control mode
0
No heat demand to the heat pump
Heating circuit with mixer M2 – moves into the OPEN position
1
Heating circuit with mixer M3 – control mode
No heat demand to the heat pump
Heating circuit with mixer M2 – control mode
2
Heating circuit with mixer M3 – moves into the OPEN position
No heat demand to the heat pump
Heating circuit with mixer M2/M3 – moves into the OPEN position
3
No heat demand to the heat pump
Heating circuits with mixer M2/M3 – control mode
4
Heat demand to the heat pump
Heating circuit with mixer M2 – moves into the OPEN position
5
Heating circuit with mixer M3 – control mode
Heat demand to the heat pump
Heating circuit with mixer M2 – control mode
6
Heating circuit with mixer M3 – moves into the OPEN position
Heat demand to the heat pump
Heating circuit with mixer M2/M3 – moves into the OPEN position
7
Heat demand to the heat pump

External blocking/mixer CLOSED

Select how the "Ext. blocking" or
"Mixer CLOSE" functions should
affect the heat pump.
138
(cont.)
4 Setting range
Note
& Parameter "Ext. blocking" takes
priority over "Ext. demand" (see
page 138).
& See also "Set flow temperature for
external demand" on page 156.
!
0 to 7
Please note
The system frost protection
may no longer be ensured.