Bosch SSB1000 SA, Manual, Page: 7 / 84

SSB 6720892984 (2019/02) US
STAND-ALONE BOILER (Burners Cascade) - SYSTEM ARCHITECTURE | 7
2 .2 .2 Setpoints on touch screen
The following table describes the setpoints that are shown on ver 2.d or higher:
CH mode
Cascade screen – System setpoint
Cascade system supply setpoint
Boiler screen – Boiler Setpoint Cascade
boiler supply setpoint
Module screen – Module Setpoint
Burner supply setpoint
No demand CH Mode X setpoint Frost Protection Setpoint Frost Protection setpoint
Frost CH Mode X setpoint Frost Protection Setpoint Frost Protection setpoint
0 Parameter CH setpoint
Cascade system supply setpoint
+
increase calculated by the boiler cascade
controller
Cascade boiler supply setpoint
+
increase calculated by the burner/module
cascade controller
1 Calculated outdoor setpoint
2 Calculated outdoor setpoint
3 Calculated outdoor setpoint
4 0-10V input setpoint
Emergency
Cascade
See above Cascade System Emergency Setpoint
Cascade boiler supply setpoint
+
increase calculated by the burner/module
cascade controller
Emergency
Boiler
See above Boiler Emergency Setpoint Boiler Emergency Setpoint
The following table describes how the setpoint is limited in a cascade system:
E2_Ch_Max_Setpoint 90°C / 194°F = Absolute maximum setpoint
Controller maximum setpoint = 90°C / 194°F E2_CH_Reset_Curve_Boiler_Maximum
CH Control range
Controller minimum setpoint = 30°C / 86°F E2_CH_Reset_Curve_Boiler_Minimum
E2_Ch_Min_Setpoint 20°C / 68°F = Absolute minimum setpoint
2 .3 2 Burners Cascade with Touchscreen and Building Management System (BMS)
Single boiler containing up to 2 modules/burners
BMS bus
Cascade bus
Module / burner 1
Touch Screen
RS485
RS232
Module / burner 2