Pre-control with 2 valves connected in series
SERV setting value
No.
Function
95
+49
Dependent on the external temperature, the controller determines whether domestic-hot-water heating
has priority or is handled in parallel to heating circuit 1. Domestic-hot-water heating has priority if the
external temperature lies above this setting value (depending on the configuration of the system, it may
be possible that the flow temperature of the heating-system water reaches a value corresponding to
SERV 91 or SERV 93; refer also to PRO time programs)
+49: always in parallel
–49: always with priority
(–49...+49) (° C)
96
–49
Dependent on the external temperature, the controller determines whether domestic-hot-water heating
has priority or is handled in parallel to heating circuit 2. Domestic-hot-water heating has priority if the
external temperature lies above this setting value (depending on the configuration of the system, it may
be possible that the flow temperature of the heating water reaches a value corresponding to SERV 91 or
SERV 93; refer also to PRO time programs)
+49: always in parallel
–49: always with priority
(–49...+49) (° C)
SERV setting value
No.
Function
97
10
Secondary pre-control
If a final control element is provided on the primary as well as on the secondary side, the flow-
temperature setpoint of the pre-controlled (intermediate) circuit can be set higher than the
flow-temperature setpoint "behind" the secondary valve by means of this value.
(1...29) (K)
98
8
Secondary return-temperature limitation
A limiting value below the limiting value of the primary circuit can be assigned to the return temperature of
the secondary side if a final control element is provided on the primary as well as on the secondary side,
and if a return-temperature sensor is provided in the return line of the circuit controlled by the secondary
valve
(1...29) (K)
R
–
48
–
7 000458 003
