Heating characteristic 2 (for heating circuit 2)
Limits for heating characteristic 1 (heating circuit 1)
SERV setting value
No.
Function
70
0.50
Curvature factor of the heating characteristic for heating circuit 2
The curvature factor takes account of the heat dissipating properties of the heating system. Particularly
for higher outdoor temperatures (typically 10...20 ° C), the secondary flow temperature can be modified
efficiently with this parameter if required.
0,00
1,00
=
=
straight heating characteristic (without curvature)
heating characteristic with maximum curvature
(0.00...1.00)
71
0.0
Influence of extraneous heat on heating characteristic 2 (heating circuit 2)
A continuous supply of extraneous heat (e.g. presence of people, heat dissipation of machines) can be
compensated for by shifting the base point of the heating characteristic towards lower outdoor
temperatures.
(0.0...4.9) (K)
72
–3
Room-temperature link-up for heating circuit 2, room temperature > room-temperature setpoint.
If a room-temperature signal is available for heating circuit 2 and if the room temperature is higher than
the corresponding setpoint, these deviations (per K) are compensated for automatically by reducing the
flow-temperature setpoint (according to heating characteristic 2).
0
–1
–9
=
=
=
function not active
function active with minimum influence
function active with maximum influence
(0...–9) (K/K)
73
0
Room-temperature link-up for heating circuit 2, room temperature < room-temperature setpoint.
If a room-temperature signal is available for heating circuit 2 and if the room temperature is below the
corresponding setpoint, these deviations (per K) are compensated for automatically by increasing the
flow-temperature setpoint (according to heating characteristic 2).
0
1
9
=
=
=
function not active
function active with minimum influence
function active with maximum influence
(0...9) (K/K)
SERV setting value
No.
Function
74
75
Max. limitation of flow-temperature setpoint for heating circuit 1
(20...149) (° C)
75
0
Min. limitation of flow-temperature setpoint for heating circuit 1
This value limits the sec. flow temperature to a min. setpoint value in the "normal operation" mode
(and "reduced operation" (see SERV 76) if set), but not in "OFF" mode. The min. limitation is cancelled as
soon as the heating limit for summer operation (PAR 4) is detected. A value of 0 must be specified if no
min. limitation is required.
(0...149) (° C)
76
0
Validity of min. limitation of the flow-temperature setpoint for heating circuit 1 during reduced operation.
0
1
=
=
min. limitation for this heating circuit when reduced operation is not activated
min. limitation for this heating circuit when reduced operation is activated.
(0/1)
R
–
42
–
7 000458 003
