Viessmann VITOCAL 250-A - Auxiliary Functions

38
End heating mode:
■
Heating mode ends if the adjusted outside tempera-
ture is greater than or equal to the summer economy
mode temperature threshold (parameters 1395.1,
1396.1, 1397.1, 1398.1) plus 1 K.
Or
■
Heating mode ends if the adjusted outside tempera-
ture is greater than the set room temperature plus
the hysteresis of the outside temperature economy
function (parameters 2426.1, 2427.1, 2428.1,
2429.1).
Example for heating/cooling circuit 1
°C
t
A
B
C
D
E
F
G
AG G
K
Fig. 10
A
Cooling mode: Heating circuit pump running
(parameter 2413.0).
B
Cooling mode: Heating circuit pump is off (parame-
ter 2413.1).
C
Set room temperature for cooling
D
Set room temperature for heating
E
Heating mode: Heating circuit pump is off (param-
eter 1395.1 plus 1 K).
F
Summer economy mode heating limit (parame-
ter 1395.1)
G
Heating mode: Heating circuit pump is running
(parameter 1395.1 minus 1 K).
K
Adjusted outside temperature
Auxiliary functions
External demand
In conjunction with a WAGO gateway, an external
demand can be sent to the heat pump with a fixed set
flow temperature (parameters 1627.0, 1628.0, 1629.0,
1630.0).
External blocking
If contact 143.1/143.2 is closed, heating/cooling mode
is disabled. The instantaneous heating water heater
and external heat generator are also disabled (param-
eters 1232.0 and 2330.0).
Function description
Heating/cooling (cont.)
6218234
Functions