Operational alarm over a binary input
The inputs for the operational alarm are marked in the wiring diagrams (section 12) with BE2
BM_K1 for Boiler 1 and with BE1 BM_K2 for Boiler 2.
Function
WE
Configuration
Operational alarm K1, 2
ON
Co1, Co2* -> Fb01 = ON
* Only in systems Anl 4 to 7
Operational alarm after start-up
Function
WE
Configuration
Operational alarm K1, 2
ON
0 s
Co1, Co2* -> Fb01 = OFF
Start-up time for boiler / 0 to 5400 s
* Only in systems Anl 4 to 7
5.11 Return flow sensor acting as a thermostat
The return flow sensors can optionally be replaced by thermostats. For this purpose, the inputs
for the return flow sensors are defined as binary inputs. The thermostats are connected to the
same terminals as the return flow sensors.
Function
WE
Configuration
Return flow sensor RüF1, 2
ON
Co1, Co2* -> Fb04 = OFF
StEiG: Thermostat closes
FALL: Thermostat opens
* Only in systems Anl 4 to 7
EB 5474 EN
41
Boiler functions
