When control voltage is switched on, and oxygen sensor is activated, heating is on and
oxygen sensor is ready for operation.
Activate oxygen sensor during first start-up, and always after power failure, to start
heating. Oxygen sensor is ready for operation when 1292 °F is reached. It takes
approx. 10 min to reach the temperature.
Oxygen sensor is self testing. Self test monitors aging of the device, based on
measurement cell resistance and response time. If measurement cell resistance and
response time exceed 400Ω and 25 seconds, self test gives an alarm, and sensor must
be changed.
O
2
module settings are in the following menu level:
Description
Params. & Display
O2 Module
Displayed Values
Actual O2 Value
Actual O2 Value
O2 Setpoint
O2 Setting
SupplyAirTemp
Supply air
temperature in °F
FlueGasTemp
Flue gas
temperature °F
CombEfficiency
Combustion
efficiency
QGO SensorTemp QCO-sensor
temperature °F
QGO HeatingLoad Control value of
QGO... heating,
0,1%
QGO Resistance
Internal resistance
of QGO's Nernst
cell
Self test is made at 23-intervals. Test requires constant O
2
level, for e.g. after pre-
purge or on steady load. If constant O
2
level is not reached within 24 hours, burner
control locks down operation load to reach constant O
2
level for next test. If burner is in
stand by mode, test is made during next burner start-up.
Flue gases containing aggressive acids may considerably shorten the
useful life of the oxygen sensor.
O
2
module can be connected with burner combustion air and flue gas temperature
sensors. If sensors are connected, warning is displayed when flue gas temperature is
too high, and combustion efficiency will be calculated and displayed.
Check that the oxygen value, sensor temperature, heating efficiency,
and resistance values are displayed. If temperature sensors have been
connected and activated, the values should be displayed.
M4263 2206EN
49 (102)
