Commissioning Notes - Siemens QGO21 Series Basic Documentation

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Building Technologies Division

1.5 Commissioning notes


To prevent the collection of condensate inside the QGO21, do not put the burner
into operation before the sensor's heating up phase is completed
During the sensor's heating up phase, temperature differences between the inner and
outer electrode generate thermo-electric voltages which, in that phase, falsify the
acquired oxygen value.
When commissioning the control system, the heating up times must therefore be
observed.
It is also recommended to keep the sensor activated during short burner off periods
(2 days).
Prior to commissioning, make the following mounting final checks:
Check to ensure that the sensor is correctly fitted to the mounting flange
-
- Ensure that the signal and power supply lines are correctly connected
Electronic circuit
Activate the electronic circuit (LMV52, PLL52)
-
Wait until the sensor has reached its normal operating temperature, the residual
-
oxygen content is displayed on the associated control unit (LMV52 with PLL52) and
has stabilized. For more details, refer to the Basic Documentation of the associated
control unit (LMV52 with PLL52)
Oxygen Sensor QGO21...
1 Safety notes
CC1P7845en
06.12.2017