• Ignition Position: Sets the air fuel valve position at which the unit will ignite. This
allows you to set the air fuel valve position during the ignition sequence
(Range: 5% to 60%)
• Ignition Blower Voltage: Sets the blower voltage during ignition.
(Range: 0.25 to 10.0 V)
• Low Fire Timer: Specifies how long to remain in the low fire position after ignition,
before going to the desired output. (Range: 2 to 600 sec.)
• Ignition Hold Timer: Sets the length of time the unit stays in ignition position. (Range:
0 to 60 sec.)
• IGN Time Setting: Displays (read-only) the maximum allowable time between
confirmation of gas valve opening (POC) and a stable flame detected; some legacy units
allowed up to 7 seconds.
Operating Control
The Operating Control screens provides parameters to view or modify operating levels that
apply to this unit only.
1. Go to: Main Menu → Advanced Setup → Performance → Fire Control → Operating
Control.
Figure 6.6.3.3: Fire Control: Operating Control Levels
2. The following operating control parameters are available:
• Start Valve Position: Specifies the valve position at Start Level.
(Range: 0 or Stop Valve Position to 40%)
• Stop Valve Position: Allows the Stop Level to be set to a valve position.
(Range 0% to Start Valve Position)
• Max Valve Position: Sets the maximum allowable valve position for the unit. (Range:
40 to 100%)
• Standby Blower Voltage: Sets the blower voltage when the unit is in Standby Mode,
during which the blower motor remains “ON” at low speed, to limit power cycles. AERCO
recommends keeping the default. However, individually vented units in positive pressure
boiler rooms may set this between 2.00 and 0 volts to compensate.
(Range: 0.0 to 10.0V)
• Vlv Position Change Rate: Defines the rate at which the valve position will
progress from one step to the next. (Range: 0.5 to 60 sec.)
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