Siemens LMV5 Series Technical Instructions page 206

Technical Instructions
Document No. LV5‐1000

If a combustion air temperature sensor is installed and activated, the air temperature will be
recorded when the last point is entered into the O
the following menu path:
Params & Display > O2Contr/Alarm > Gas/Oil Settings > Startmode > Adjust. Temp O2
This is the temperature that will be compared against the current air temperature to perform
temperature compensated light‐off if parameter StartMode is set to "IgnLoadTC" or "IgnPtWithTC"
(LMV52.440 only).

When terminal X5‐03.2 is properly configured (see Section 3 ‐ Parameters), it can be energized to
cause a deactivation of the O
Control Curve. The O
deactivation via X5‐03.2 occurs without a notification being displayed on the AZL52.

Pre‐purge must be set so that 20.9% (+/‐ 2.0% O
lockout or deactivation will occur depending on the setting of parameter OptgMode.

When using the LMV52.440 on low or ultra‐low NOx mesh burners, a StartMode of "IgnPtWithTC" is
typically used combined with adjusting O2InitOffset in the negative direction (more rich). If done
properly, this should make the transition from light‐off position to low fire richer than normal
operation so that the transition is stable and reliable under varying environmental conditions. While
the burner is being held at Point 2 awaiting NumberTauSuspend to expire, the O2InitOffset will
gradually dissolve and the %O
modulate.

The AGO gas collector should be mounted per the requirements shown below:
Section 6 Page 34 SCC Inc.
trim. When this is done, the LMV52 will operate on the O
2
rich and lean limits will be active as long as there is a valid O
2
will be trimmed to setpoint before the burner is released to
2
HOME
Control Curve. This temperature is stored under
2
) is read by the QGO20 sensor. If this is not met, a
2
LMV Series
Ratio
2
signal. This
2