PB-1525 Wood Pellet Burner System: Installation and Operation Manual
Rev 1.0, OCTOBER 2011
Page 33 of 67
Purging 348
0 65°F _
Resets: 14
Disa End
Figure 3.7: PB-1525 Burner Controller in the Purging State
As depicted above, the System State is “Purging”. The unit is running he
combustion blower at high speed and continues to monitor the flame
sensor to ensure all fuel in the burn chamber is extinguished. If the system
senses the presence of flame or intense glowing embers within the burn
chamber it will revert back to the Shutting Down State. Disabling the unit
in this state will cause the system to continue the full purge, then the
system will ignore the thermostat (See the section on System Disabled).
ALARM
The Alarm state indicates the system has detected a problem and has
shut down. Following the detection of an alarm condition the unit will run
the combustion blower for a set period of time on the Low Speed setting.
The display will indicate the type of alarm and may suggest a potential
cause for the condition. For example, if flame is lost during the Firing State,
the alarm will read: “Lost flame – No Fuel?” The only way to reset the
system and exit the Alarm State is to cycle the power. This can be
accomplished by removing the larger, 7-Pin cable from the burner unit
and plugging it back in. When powered back up the alarm will be
cleared and the system will run normally. Figure 3.8 below illustrates the
controller in the Alarm state.
