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Building Technologies
19.4 O2 trim control
19.4.1 Operating modes of O2 trim controller / O2 alarm
The O2 trim controller or O2 alarm can be deactivated or activated in various operating
modes by setting a parameter.
Caution!
The ratio control curves must always be adjusted such that there are sufficient
amounts of excess O2 available, irrespective of environmental conditions!
man deact
Both the O2 trim controller and O2 alarm are deactivated.
The system operates along the parameterized ratio control curves.
O2 Alarm
Only the O2 alarm is active.
Prior to startup, the QGO20 must have reached its operating
temperature. If not, startup is prevented. If the O2 alarm responds, or
if an error occurs in connection with O2 measurement, the PLL52 or
the QGO20, safety shutdown is initiated, depending on the reading of
the repetition counter, followed by lockout, if necessary
O2 Control
Both the O2 trim controller and the O2 alarm are active. Prior to
startup, the QGO20 must have reached its operating temperature. If
not, startup is prevented. If the O2 alarm responds, or if an error
occurs in connection with O2 measurement, the PLL52 or the
QGO20, safety shutdown is initiated, depending on the reading of the
repetition counter, followed by lockout, if necessary
conAutoDeac
Both the O2 trim controller and the O2 alarm are active (option
automatic deactivation). Startup takes place before the QGO20 has
reached its operating temperature.
Caution!
Accumulation of condensate inside the QGO20!
If the mains voltage is switched off in advance, then starting up
before the QGO20 has reached its operating temperature may
lead to an accumulation of condensate inside the QGO20, which
could damage it. The QGO20 must be heated to at least 300°C to
ensure no condensate can accumulate.
Display on the AZL52:
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Basic Documentation LMV5...
19 O2 trim control with LMV52 and PLL52
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