Control Operations Guide Bosch Buderus SSB255 | SSB399 | SSB512 Boilers | 19
Bosch Thermotechnology Corp. | 03.2018
Data subject to change
Parameter Description
Max. Setpoint Off set UP.
(parameter #80)
See Parameter #79 for explanation of Off set UP and Off set Down. Default value of Off set UP is 18 °F. Adjustable
from 0 °F to 36 °F.
Start Modulation Delay Factor
(parameter #81)
The Managing boiler will calculate the diff erence between the System Target Setpoint and the measured System
Supply Temperature once a period of time equal to Delay Period Start Next Boiler x Start Modulation Delay Factor has
passed. Default value for Modulation delay is 5. Adjustable from 0 to 60.
Next Boiler Start Rate
(parameter #82)
"The percentage of burner power a boiler must reach before the Managing boiler will begin the process of bringing on
the next boiler within the cascade. See Parameter
#75 for further information on the amount of time which must pass at this power percentage before the next boiler in
the cascade rotation is enabled. Default value is 80%. Adjustable from 10% to 100%."
Next Boiler Start Rate
(parameter #83)
The percentage of burner power a boiler must reach before the Managing boiler will begin the process of turning
off the last boiler enabled within the cascade rotation sequence. See Parameter #76 for further information on
the amount of time which must pass at this power percentage before a boiler is turned off . Default value is 30%.
Adjustable from 10% to 100%.
Boiler Rotation Interval
(parameter #84)
The amount of time (in Days) which will defi ne the boiler rotation interval. Default value is 1 day. Adjustable from 0
(disable rotation) to 30 days.
Domestic Hot Water Boiler Assign
(parameter #85)
Not available
Table 14
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