68
6 Commissioning
6.8.2 Check Shut-Off Limits on TPS Output of VMS
NOTICE
Repeat this method for all relevant operating modes (curve sets).
With the adjusted limits towards excess air, it has to be ensured that the flame burns reliably
and stably, and also the flame produces no CO from excess air. If this is not ensured, the
above described inspection has to be executed towards excess air instead of air deficiency.
Switch (1) to FIRING RATE
Run to firing rate point to be checked
Wait until the system has run through that point
Switch (2) to SETTING
Adjust setpoint value (4) of the three-point step channel
in air deficiency direction (for dead band setting, see
parameters 62-76)
Check combustion
Reset setpoint value (4) to original value
In this way run all channels in succession to the limit at
the various firing rate points -normally at low, medium
and full firing rate.
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