Weishaupt W-FM 100 Installation And Operating Instruction page 135

83054802 1/2018-07 La
Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
Activate boiler cold start function (ColdStartOn)
Parameter ColdStartOn activates or deactivates the boiler cold start function.
Switch-on threshold (ThresholdOn)
Parameter ThresholdOn stipulates the switch-on threshold for the boiler cold
start function.
If the boiler temperature is below the switch-on threshold at heat demand, the W-
FM carries out the cold start sequence.
The switch-on threshold is given as a percent value and relates to the current set-
point W1 or W2. If an additional sensor is connected to input X60, the switch-on
threshold relates to the setpoint set under Setp AddSensor .
Load stage (StageLoad)
Parameter StageLoad stipulates the stage for load increase in modulating oper-
ation.
When the boiler temperature reaches the next setpoint step StageSetp_..., the
burner capacity increases by the percentage point set.
If the next setpoint step is not reached, the capacity increases after the residence
time Maxtme_... set has elapsed.
Setpoint stage (StageSetp_...)
The parameters stipulate the step for the setpoint increase.
Parameters
StageSetp_Mod
StageSetp_Stage
The setpoint step is given as a percentage value and relates to to current set-
point W1 or W2. If an additional sensor is connected to input X60, the switch-on
threshold relates to the setpoint set under Setp AddSensor .
When the boiler temperature reaches the current cold start setpoint, the cold start
setpoint increases by the step set.
In addition, the burner capacity in modulating operation increases by the load step,
in multi-stage operation the next stage switches.
Residence time (MaxTme_...)
The residence time stipulates the minimum time after which the burner capacity is
increased.
If the boiler temperature does not reach the current cold start setpoint after this
time has elapsed, the burner capacity is increased and the time starts again. In
modulating operation, the burner capacity increases by the load step set, in multi-
stage operation the next stage switches.
Parameters
MaxTmeMod
MaxTmeStage
135-228
Function
Setpoint step for modulating operation
Setpoint step for multi-stage operation
Function
Minimum time for modulating operation after which the
burner capacity is increased.
Minimum time for multi-stage operation after which the
next stage switches, provided that the stages have been
released in parameter Release Stages.
6 Operation