60
• Low Fire Rate: The lowest firing rate the IFC controls
to during a heating cycle.
• High Firing Rate: The maximum firing rate that an
installed appliance can attain based on manifold ori-
fices and the high pressure switch setting.
• Ignition Firing Rate: The target firing rate at which
the appliance always lights off. The appliance stays at
this firing rate until the Ignition Stabilization Period
expires. It then moves to the target firing rate called for
by the operating sequence.
• Target Firing Rate: The firing rate that the IFC con-
trols the inducer to attain at a given time in the operat-
ing sequence.
• Heat Fan On Delay: The period between proof of the
supervised main burner flame and the activation of the
blower motor at the low heat speed.
• Heat Fan Off Delay: The period between the loss of
supervised main burner flame after the call for heat has
ended and the deactivation of the blower motor.
• 2
nd
Stage On Delay: This applies to systems config-
ured for 1-stage thermostats. The length of time oper-
ating in normal low fire mode before switching to mid
fire mode.
• Auto Restart Delay: The time delay waited before the
control is able to perform a new trial for ignition in the
case of Soft Lockout.
• Soft Lockout: A state caused a system fault such as
loss of flame or pressure switch failure .
• Hard Lockout: A state caused by a failure internal to
the control or by a system fault such as a flame rollout
• Fault Debouncing Time: The period between a sys-
tem fault occurring and the IFC recognizing the fault
has occurred. This time varies depending on the spe-
cific fault.
• Factory Shared Data: Data used by a ClimateTalk™
device for specific configuration parameters. This data
will be programmed in at the Goodman factory.
Heat Exchanger Prepurge 15 sec ---
HSI Warm Up 17 sec Same for all trials
Ignition Activation Period 3 sec ---
Flame Recognition Period 1 sec ---
Trial For Ignition 4 sec TFI = IAP + FRP
Gas Valve Sequence Period 12 sec ---
Ignition Stabilization Period 10 sec ---
Flame Debounce Period 2 sec
Time it takes to debounce
flame presence or failure
Post-purge 29 sec ---
Inter-purge 30 sec ---
Auto Restart Delay 60 min ---
Ignition Retries 2 3 trials total
Ignition Recycles – Flame Failure 2 3 flame losses total
Flame Failure Response Time 2 sec max @ 1uA
Other Parameters
---
Low Fire Rate 35% % of target high fire rate
Ignition Fire Rate 80% % of target high fire rate
High Fire Rate 100% ---
Ignition Activation Chart
Ignition Retries:
When flame is not sensed during the Trial for Ignition Period:
• The valve is de-energized.
• The inducer remains energized at ignition speed dur-
ing the Inter-purge Period.
• The circulator if already running remains energized at
the current CFM for the circulator fan off delay period.
• When the Inter-purge Period expires, the control pro-
ceeds to the HSI Warm-up and then a new Trial for
Ignition is started again for up to a maximum of two
additional trials (3 attempts total). After the third Trial
for Ignition has failed to light the burner the IFC pro-
ceeds to Soft Lockout through the Post-purge where
the inducer remains energized at the ignition speed.
Error code “E0” is flashed during the Soft Lockout pe-
riod.
The retry count is cleared if flame is sensed for longer
than 10 seconds after exiting Trial for Ignition, or upon
exit of Soft Lockout.
Ignition Recycles:
When flame is established during Trial for Ignition, and then
lost:
• The gas valve is de-energized.
• The inducer moves to the ignition speed and holds for
the Inter-purge Period.
ABBREVIATIONS & OPERATION
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