John Wood Atmospheric Gas (ENERGY STAR) - NEW - Manuel (Page 32)

32
SEQUENCE OF OPERATION CHART
Apply Power
to Appliance.
Is Damper
Closed?
Y
Is there a
Call for Heat.
Is Damper
Open?
Will not attempt to light. 2
flash error code. See
Corrective Action Table
on pages 30-31.
N
Damper Energizes.
Gas Valve attempts to open damper
for 30 seconds, displays 3 flash error
code, and then waits 2 mintues before
attempting to open damper again. See
Corrective Action Table pages 30-31.
N
Pilot Valve
Energizes
Does Pilot
Valve Open?
Spark Electrode
is Energized
Is
Pilot Flame
Sensed Within
1.5 min. ?
Main Valve
Energized
Does Main
Valve Open?
Is Main
Flame Sensed?
Is Demand for
Heat Satisfied?
Pilot & Main
Valve De-Energize.
Is Flame
Sensed?
Damper Energizes
and Closes.
Will not light. 8-4 flash
error code. See Corrective
Action Table on pages 30-31.
N
Will not light. 8-4 flash
error code. See Corrective
Action Table on pages 30-31.
N
Will not light. 8-4 flash
error code. See Corrective
Action Table on pages 30-31.
N
Will not light. 8-4 flash
error code. See Corrective
Action Table on pages 30-31.
N
Water heater will continue to
operate normally until
demand is satisfied.
N
Wait for flame lost, 5 flash
error code. See Corrective
Action Table, pages 30-31.
Y
Damper closes, displays 6-4
Flash Error Code, and gas
control valve goes into 20
minute lockout. See Corrective
Action Table, pages 30-31.