Function
WE
Configuration
Boiler sensor KF1, 2
ON
Co1, Co2* -> Fb03 = OFF
StEiG: Thermostat closes
FALL: Thermostat opens
*Only in systems Anl 4 to 7
5.9
Modulation feedback
The modulation feedback in systems Anl 3, 6 and 7 can be implemented by a potentiometer (1
to 2 k
Ω
) or by a limit switch for maximum boiler capacity output.
Modulation feedback with potentiometer
The inputs for the potentiometer are marked in the wiring diagrams (–> section 12) with SG_K1
(potentiometer 1) and with SG_K2 (potentiometer 2).
Function
WE
Configuration
Modulation feedback K1, 2
ON
Co1, Co2* -> Fb07 = ON
* Only in system Anl 7
Note!
In system Anl 7, the binary input BE4 can be used either for modulation feedback, for external
DHW demand or for external change in lag/lead sequence.
5.10 Operational alarm
The boiler controller waits for an operational alarm before it continues (–> section 5.1). The
operational alarm can optionally be issued over a binary input or after fixed time entered in
Start-up time for boiler parameter.
40
EB 5474 EN
Boiler functions
