20
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Subject to change due to technical improvements
Expert maintenance after 10,000 kg Maintenance
Differential pressure transmitter
The "Measuring orifice" signal from the differential
pressure transmitter must show a
measured value
of 0 Pa
when the
boiler is switched off
and both
hoses are disconnected
. The measurement must
be calibrated in the event of deviating measured
values. The "Service" access level is required to
do this.
Differential pressure transmitter
Calibrating the differential pressure measurement
Switch off the boiler with the on/off button
. As soon as the
boiler status is "Switched
off"
,
detach both hoses from the differential
pressure transmitter
.
Using the "Service" access level, tap the [Inputs]
line in the boiler's text menu. Select [Measuring
orifice] from the submenu and read the current
value.
For a
correct measurement
, the
value for the
[Measuring orifice] parameter must be 0 Pa
.
2
x
If a
deviating value
is shown, the
measurement
must be calibrated
.
Tap the
[Offset] parameter
twice and
enter the
difference from the target value of 0 Pa
in the
settings window, e.g.:
Measuring orifice 2 Pa --> Offset = -2
Measuring orifice -4 Pa --> Offset = 4
If a deviation of more than +/- 10 Pa is shown, the
differential pressure transmitter must be replaced.
Blow out the hoses on the differential pressure
transmitter and reconnect them. The hoses may
not be kinked or crossed.
The boiler can then be returned to operation.