4 | Parameters overview
70 B1820023_en | Service handbook Lambdatronic H 3200 - T4e
Start priority of the master boiler 1
Start priority of slave boiler 1 1
Start priority of slave boiler 2 1
Start priority of slave boiler 3 1
Sensor input of the top sensor switch
NOTICE!This is displayed only for the master boiler
and hydraulic system 0 or variant 1.
Specifies the input of the top sensor switch to which the
connection is made.
Sensor input of the bottom sensor switch
Specifies the input of the bottom sensor switch to which
the connection is made.
Hysteresis for regulating range
NOTICE!Only for boilers that have no storage tank.
The parameter relates to the actual temperature of the
cascade (average of all boilers that are currently active).
▪ State “Cold start”: As long as the current temperature
of the cascade is lower than the setpoint temperature
less the hysteresis value for the control range, further
boilers will be started after a delay. As long as the
current temperature of the cascade is higher than the
setpoint temperature less the hysteresis value for the
control range, the system switches to the “control
range” status.
▪ Status “Control range”: The boilers that were started
will run. As long as the current temperature of the
cascade is lower than the setpoint temperature less the
hysteresis value for the control range, the system
switches to the “cold start” status. As long as the
current temperature of the cascade is higher than the
setpoint temperature plus the hysteresis value for the
control range, the system switches to the “shutdown”
status.
▪ Status “Shutdown”: After a delay, each boiler will be
shut down in succession. As long as the current
temperature of the cascade is lower than the setpoint
temperature plus the hysteresis value for the control
range, the system switches to the “control range”
status. As long as the current temperature of the
cascade is higher than the setpoint temperature plus
the hysteresis value for the control range and the
hysteresis value for the quick output reduction, the
system switches to the “quick shutdown” status.
▪ Quick shutdown status: After a delay, each boiler will
be shut down in succession. As long as the current
temperature of the cascade is lower than the setpoint
temperature plus the hysteresis value for the control
range and the hysteresis value for the quick output
reduction, the system switches to the “shutdown”
status.
During a cascade, if boilers 3 and 4 have no storage tanks
they cannot be modulated and they are run at an elevated
boiler setpoint temperature (the setpoint temperature of
the cascade plus the hysteresis value for the control range
and the hysteresis value for the quick output reduction.
Hysteresis for quick output reduction
NOTICE!Only for boilers that have no storage tank.
The parameter relates to the actual temperature of the
cascade (average of all boilers that are currently active).
▪ State “Cold start”: As long as the current temperature
of the cascade is lower than the setpoint temperature
less the hysteresis value for the control range, further
boilers will be started after a delay. As long as the
current temperature of the cascade is higher than the
setpoint temperature less the hysteresis value for the
control range, the system switches to the “control
range” status.
▪ Status “Control range”: The boilers that were started
will run. As long as the current temperature of the
cascade is lower than the setpoint temperature less the
hysteresis value for the control range, the system
switches to the “cold start” status. As long as the
current temperature of the cascade is higher than the
setpoint temperature plus the hysteresis value for the
control range, the system switches to the “shutdown”
status.
▪ Status “Shutdown”: After a delay, each boiler will be
shut down in succession. As long as the current
temperature of the cascade is lower than the setpoint
temperature plus the hysteresis value for the control
range, the system switches to the “control range”
status. As long as the current temperature of the
cascade is higher than the setpoint temperature plus
the hysteresis value for the control range and the
hysteresis value for the quick output reduction, the
system switches to the “quick shutdown” status.
▪ Quick shutdown status: After a delay, each boiler will
be shut down in succession. As long as the current
temperature of the cascade is lower than the setpoint
temperature plus the hysteresis value for the control
range and the hysteresis value for the quick output
reduction, the system switches to the “shutdown”
status.
During a cascade, if boilers 3 and 4 have no storage tanks
they cannot be modulated and they are run at an elevated
boiler setpoint temperature (the setpoint temperature of
the cascade plus the hysteresis value for the control range
and the hysteresis value for the quick output reduction.
Delay for the request of the boiler from a flue gas
min. temp
For a cascade that has no storage tanks, the request for a
further boiler / switching off a boiler is subject to a delay.
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