L.B. White Premier 350 Owner's Manual And Instructions page 31

-- Ignition control module sends high voltage to the igniter
electrode.
-- Igniter sparks.
-- Ignition control module sends 24 volts to the gas control
valve through the high limit switches.
-- Gas control valve opens.
-- Ignition occurs.
-- Igniter continues to spark until fl ame proving occurs.
-- Ignition spark is cut off.
-- Gas valve stays open.
-- Room warms to desired temperature.
-- Thermostat is satisfi ed.
-- Gas control closes, burner shuts down.
-- Fan motor continues to run for 1 minute,
cooling the heat chamber.
-- Fan motor stops.
-- Heater shuts off.
-- Process starts again on a call for heat.
IGNITION FAILURE SEQUENCE:
-- Trial for ignition takes approximately 10 seconds.
-- If ignition module does not sense a fl ame within the
ignition trial, the module goes into safety lockout (3 fl ash
pattern.)
-- Gas valve closes.
-- Ignition spark shuts off.
-- Fan motor stops.
-- To retry for ignition, the systems must be reset:
-- Turn the thermostat down and then up to call for heat
or unplug heater and plug it back in or
-- Position selector switch to off and then back to on.
Premier Ductable Heaters
Owner's Manual • Premier 350
31