Main Light Off - ProFire PF2200-SB Product Manual

2.2.8 MAIN LIGHT OFF

Once the system has a proven flame and all conditions are satisfied, the system enters the Main Light
Off state. If the system entered the Main Light Off state from the Ignition state, the Main Light Off state
is held for a configurable amount of time (Main Startup Delay Time). This parameter is configurable
during commissioning and is intended to give the appliance time to establish draft and heat up before
the mains are turned on. If the system entered the Main Light Off state from a Process Control state,
the Main Startup Delay Time will be set to a fixed 5 seconds – since draft has already been established
and the appliance is already warm.
In addition to the minimum time requirements, the Main Light Off state also has the option of proving
the light off position. When Proof of Main Light off position (POLO) is enabled, the Main Light Off state
will hold until either the position has been proven or 60 seconds have elapsed. If the position cannot
be proven in the allotted time, the system will alarm. For more details on the Proof of Main Light Off
input, see section 2.1.
Any alarms or waits that occur during Main Light Off still will force the system to transition to Alarm
state or Waiting state, respectively.
In the Main Light Off state, the status of each powered outputs is as follows:
Powered Output
Pilot 1
Pilot 2
Coil 1 /2
SSV
HFV
Status
Energized
De-energized if disabled
Energized if enabled
De-Energized
Section 2: PF2200-SB PRODUCT DESCRIPTION
V 4.0
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