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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
Flow temperature setpoint in case of fixed value with adaption
If the flow temperature setpoint is predefined via parameterization, the value can be
adapted depending on the demand for heat. This function ensures that the heat request
sent to the heat source during the entire heating season does not always represent the
high setpoint required for the very cold season.
The function requires no outside sensor.
Adaption can be deactivated (---).
Line no. Operating line
HK1 HK2 HK3
744 1044 1344 Swi-on ratio room stat
Adaption of the setpoint is subdivided into 2 functions:
Dynamic readjustment of flow temperature setpoint
If the current flow temperature setpoint is too low, dynamic readjustment adapts the
current demand for heat.
To make the readjustment, the room thermostat’s current cold-warm time ratio is
compared with the target value.
If, during Comfort phases, the cold phase is too long, the setpoint is increased.
If a cold-warm time ratio is not yet available when switching to Comfort, the setpoint is
increased if the room thermostat remains in the Cold state for more than 2 hours.
To prevent the flow temperature from rising too quickly in the case of very short warm
phases, dynamic readjustment is activated after 30 minutes at the earliest.
Midnight adaption for the next day
Based on the demand for heat of the previous day, midnight adaption readjusts the
amount of heat required for the next day.
This adaption changes the parameterized flow temperature setpoint.
The adapted value is stored and used should a power failure occur.
For adaption, a cold-warm time ratio of the room thermostat is predefined as a target
value (1…99%).
If, during Comfort phases, the cold phase is too long, the setpoint is raised.
If the cold phase is too short, the setpoint is lowered.
Parameterized boost heating is taken into consideration when calculating the required
readjustment.
The setpoint is readjusted at midnight.
If, at midnight, the room thermostat is in the Warm state, the setpoint readjustment is
not made until the room thermostat switches to the Cold state.
Swi-on ratio room stat
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