Proven Pre-Purge Sequence - ProFire PF3100 Product Manual

13.7 PROVEN PRE-PURGE SEQUENCE

The Proven Pre-Purge sequence is a collection of sub-states that ensures a proper pre-purge for all forced draft
heating applications. The safety outputs are held de-energized through all the Proven Pre-Purge sub-states. The
sub-states are detailed in the sections below:
13.7.1 REQUEST PURGE POSITION STATE
The controller transitions to the Request Purge Position sub-state to ensure that all FARC channel outputs are
driven to their respective Purge Positions before initiating a pre-purge. All safety outputs are held de-energized
for the duration of the Request Purge Position sub-state.
13.7.1.1 SAFETY OUTPUT BEHAVIOR – REQUEST PURGE POSITION STATE
Card
PF3101-00 BMS Controller card
PF3102-00 Ion Pilot card
PF3102-01 UV Pilot card
13.7.1.2 TRANSITIONS TO THE REQUEST PURGE POSITION STATE
From Scenario
Startup Checks Absence of airflow proven
13.7.1.3 TRANSITIONS FROM THE REQUEST PURGE POSITION STATE
To Scenario
Any
Lockout Controller stopped by user
Purge position not proven
Waiting Any
Prove Airflow Purge position proven
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Startup Checks
Proven Pre-Purge
Request Purge Position
Prove A irflow
Pre-Purge
Request Pilot Position
Output
Pilot
SSV1
SSV2
Valve
Coil
Ignition Enable
Condition
No alarm or wait conditions present
Condition
Alarm condition present
Any
Any
Wait condition present
No alarm or wait conditions present
PF3100 Product Manual
Lockout
Waiting
Ignition
Output State
De-energized
De-energized
De-energized
De-energized
De-energized
Open
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