External Extension - Viessmann VITOCAL 300-A Installation And Service Instructions Manual

Output lag heat pump
Press the following keys:
1. "Device settings".
2. "Programming".
3. "System definition".
4. y/x for "Output lag heat
pump" (700B).

External extension

The external extension H1 can be
used for the following functions:
& Swimming pool water heating
& Cascade control
& Externally changing operating
modes
& Ext. demand
& External mixer OPEN
& External blocking
& External mixer CLOSE
Note
Only one function (e.g. external
demand) or one component (e.g.
swimming pool water heating) can be
connected to external extension H1.
The functions can also be connected
directly in the control unit (see
page 89).
External operating mode changeover heating circuits
Select how system components
should be affected by operating mode
changeover; see the following table.
System definition control settings
(cont.)
5. l/m for the required value
6. "BACK"
Delivered condition
Setting range
Press the following keys:
1. "Device settings".
2. "Programming".
3. "System definition".
4. y/x for "Ext. extension"
5. "YES"
6. "BACK"
In parameters "Ext. demand" or
"Ext. blocking", additionally set the
effect the changeover should have.
(average value, in the
example 12 kW).
to confirm.
10 kW
0 to 255 kW
(7010).
to enable.
to confirm.
135