Sequence Of Operation Flow Chart - Polaris PGC Instruction Manual

SEQUENCE OF OPERATION FLOW CHART

If tank temperature drops below Operating Set Point minus
Normal State of all pressure switches and ECO are checked
Water is heated to
set point
24 V Gas Control Valve
de-energized
60 second Post Purge cycle
Water heater goes
into standby mode
Differential setting a heating cycle is activated
Control System performs diagnostic checks
Pressure Switches and ECO are verified closed
Combustion Blower is energized
30 Second Pre-Purge cycle
Igniter is energized
24 V Gas Control Valve is energized
gas flows to Main Burner
Is flame sensed at the Main Burner ?
(control system monitors the flame sensor)
YES
NO
NO
24 V Gas Control Valve
de-energized
60 second Inter-Purge cycle
Retries up to
two more times
Control System
Locks Out
"Ignition Failure"
Fault Msg is
displayed
Figure 45
49
Control System Locks Out
Displays Fault Msg