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SV2 Series Safety Shut-off Valves
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Control Possibilities Via Parameter Settings
The fuel/air ratio valve control offers many settings to tune your appliance to your requirements. Following is an overview of the
available settings. The Screen shots were taken from the dedicated SV2 Series HMI/PC Tool user interfaces and are shown in
the sequence in which they appear in the Guided Valve Setup. Refer to
Fig. 51
.
Fig. 51: Fuel-Air Setup sequence.
OEM Setup
The parameters that define the threshold for the S1 (air) signal can be set via the OEM Setup page or OEM tab of the HMI/PC
Tool. The following settings are available, as shown in
Fig. 52
.
Air Proving During Pre-Purge or Burner Ignition
With both safety valves closed during pre-purge or the burner ignition sequence, the FARMOD sensor signals provide
information about the actual air flow through the appliance. The SV2 Series control offers settings in the OEM Setup
to store the expected airflow level during burner pre-ignition with user-specified thresholds. If the measured airflow
signal is outside of the specified limits, the SV2 Series control will lockout.
The air proving ignition values are set via the OEM parameters of S1 pre-ignition lower threshold and S1 pre-ignition
upper threshold.
Air Proving During Burner Operation
During the commissioning of the appliance, the S1 (air) signal at minimum burner load and maximum burner load
including thresholds is stored. Via OEM Setup parameters, thresholds can be set for the minimum and maximum S1
(air) signal. If one of the S1 signals including thresholds is exceeded (at minimum or maximum burner load), the SSOVs
will be closed, but no lockout will occur.
The air proving values during burner operation are set via the OEM parameters of S1 minimum threshold and S1
maximum threshold.