ProFire PF3100 Product Manual page 95

13.7.3 PRE-PURGE STATE
The controller transitions to the Pre-Purge sub-state to ensure that adequate airflow is detected for the duration
of the pre-purge time. The fan (HFV) output is held energized, and the output positioners are held at their
respective purge positions. All safety outputs are held de-energized for the duration of the Pre-Purge sub-state.
13.7.3.1 SAFETY OUTPUT BEHAVIOR – PRE-PURGE STATE
Card
PF3101-00 BMS Controller card
PF3102-00 Ion Pilot card
PF3102-01 UV Pilot card
13.7.3.2 TRANSITIONS TO THE PRE-PURGE STATE
From Scenario
Prove Airflow Airflow has been proven
13.7.3.3 TRANSITIONS FROM THE PRE-PURGE STATE
To Scenario
Any
Controller stopped by user
Lockout
Airflow not proven for duration of
purge
Purge position not proven for
duration of purge
Waiting Any
Request Pilot Pre-purge has completed
Position successfully
Pre-purge has completed
Ignition
successfully
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Output
Pilot
SSV1
SSV2
Valve
Coil
Ignition Enable
Condition
No alarm or wait conditions present
Condition
Alarm condition present
Any
Any
Any
Wait condition present
FARC enabled, AND
No alarm or wait conditions present
FARC disabled, AND
No alarm or wait conditions present
PF3100 Product Manual
DOC-001149 v8.0
Output State
De-energized
De-energized
De-energized
De-energized
De-energized
Open
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