Cascade - Domestic Hot Water; Cascade - Dhw Priority (Rev. 3.0.0.12377); Limitation Of The Max Power For Dhw (Rev. 4.0.905.16570) - Bosch SSB1000 SA Manual

12 | BURNERS cascade
3 .3 .1 Cascade – domestic hot water
Settings
In the installer DHW menu of the managing burner control the DHW_
Mode should be set.
Available DHW modes in cascade are mode 1 or 2.
Dependent Burner
In case a burner is set as dependent (Address = 2-8/16) the DHW
setpoint is always provided by the managing burner, the internal control of
the setpoint functions are disabled.
3 .3 .2 Cascade – DHW priority (Rev . 3 .0 .0 .12377)
Three possible level of DHW and CH heating priority are configurable:
• DHW Priority - BOTH [0]: When both CH and DHW demand have
to be served the priority it is given to the DHW demand for a given
interval (indicated with parameter DHW_Max_Priority_Timer ).As
soon as the interval has expired the priority switches to CH demand.
The interval time will be reloaded and priority will switch again after
the interval is over.
• DHW Priority - CH [1]: The priority is permanently given to CH
Demand.
• DHW Priority - DHW [2]: The priority is permanently given to DHW
Demand.
• DHW/CH Parallel[3]: The priority us permanently given to DHW
Demand. But Under the following condition the CH pump can started:
Setpoint_CH < SystemTemp.
Relevant variables
Specific Parameters Level
DHW Priority
2: Installer
Both, CH or DHW priority,
Parallel
DHW Max Priority
Timer
[min]
2: Installer
Interval time for switching
the priority
6720892984 (2019/02) US
(Default) Value Range
2 0..3
60 1..60
3 .3 .3 Limitation of the MAX power for DHW (Rev . 4 .0 .905 .16570)
When demand change from CH to DHW all burners in the boiler stop
and start DHW demand with a limit amount of burner. The parameter N_
Max_Active_Dep_DHW indicates the number of burners available for
DHW. This number will be always be limited in the control to the amount
of burners that is available in the cascade.
Relevant variables
Specific Parameters Level
N_Max_Active_Dep_
DHW
2: Installer
Max amount of active burners
per boiler for serve DHW
demand
(Default)
Range
Value
1 0..16
SSB