15 SECOND PREPURGE
IS NEGATIVE PRESSURE SYSTEM CLOSED?
(BOTH ON 2 STAGE HT)
THE SYSTEM WILL ATTEMPT TO LIGHT 3 TIMES (4 TIMES 2 STG HT) WITH A 60 SECOND
INTER-PURGE BETWEEN TRIES. IF AFTER THE THIRD TIME THE BURNERS
DO NOT LIGHT, THE SYSTEM WILL LOCK OUT. THE SYSTEM
WILL ATTEMPT TO LIGHT 3 TIMES (4 TIMES 2 STG HT ) EACH HOUR UNTIL THE BURNERS LIGHT
OR THE THERMOSTAT IS RESET.