Weishaupt W-FM 100 Installation And Operating Instruction page 136

6 Operation
83054802 1/2018-07 La
Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
Switch-off threshold (ThresholdOff)
Parameter ThresholdOff stipulates the switch-off threshold for the boiler cold
start function.
The switch-off 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 .
When the boiler temperature reaches the switch-off threshold set, the W-FM stops
the cold start sequence and the load control is activated.
Additional sensor (AdditionalSens)
If a pressure sensor is connected to input X61, the cold start function requires an
additional sensor at input X60 [ch. 3.3.20].
The additional sensor connected is defined in parameter AdditionalSens .
If the additional sensor has been defined, the setpoint set under Setp
AddSensor is deemed as the reference value for the boiler cold start function.
Temperature at additional sensor (Temp. ColdStart)
Parameter Temp. ColdStart shows the current temperature at the additional
sensor.
Setpoint for additional sensor (Setp AddSensor)
Parameter Setp AddSensor stipulates the setpoint for the boiler cold start
function if an additional sensor is defined.
Release stages (Release Stages)
In parameter Release Stages , stage 2 and stage 3 can be blocked for boiler
cold start function. The parameter is only effective in multi-stage operation.
Setting
No release
Release
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Function
Boiler cold start function is only carried out with stage 1.
Stage 2 and stage 3 are blocked for the boiler cold start
function. Parameters MaxTmeStage and Stage-
Setp_Stage have no effect.
The boiler cold start function starts in stage 1. The next
stage switches, when the boiler temperature reaches the
current cold start setpoint or the residence time is ex-
ceeded.