Honeywell SV2 Series User Manual page 105

Control Startup Delay and Enriched Mixture (Ramp Period + Hold On Period + Ignition Period + Ignition Setpoint
parameters)
The SV2 Series control offers the possibility to enrich the fuel/air mixture during the Ignition Period. The mixture can be
made rich during the Ignition Period relative to the amplification setting for the appliance RUN mode or the start load.
By entering a percentage larger than 100% in the Ignition Setpoint field (Refer to
be increased during the Ignition Period. This occurs after the Ramp and Hold On Periods have expired.
After the Ignition Period has elapsed, the SV2 Series controller will control the amplification factor to the value required
during normal burner operation (RUN mode).
For example, this setting can be used to assure a successful burner ignition during extreme start-up conditions.
Fig. 60: Control startup delay with enriched mixture (increased amplification factor).
Control Startup Delay and Leaner Mixture (Ramp Period + Hold On Period + Ignition Period + Ignition Setpoint
parameters)
The SV2 Series control also offers the possibility to set the fuel/air mixture leaner during the Ignition Period. The
mixture can be made lean during the Ignition Period relative to the amplification setting for the appliance RUN mode or
the start load.
By entering a percentage lower than 100% in the Ignition Setpoint field (Refer to
be decreased during the Ignition Period. This occurs after the Ramp and Hold On Periods have expired.
After the Ignition Period has elapsed, the SV2 Series controller will control the amplification factor to the value required
during normal burner operation (RUN mode).
SV2 Series Safety Shut-off Valves
V2F, V2V
SV2 SERIES SAFETY SHUT-OFF VALVES USER MANUAL
105
Fig. 60), the amplification factor will
Fig. 61), the amplification factor will