Sequence Of Operation - Slant/Fin LX-90 Installation And Operating Instructions Manual

36
CONTROL LOCKOUT
DISPLAY SHOWS
ERROR "A 33"
CONTROL LOCKOUT
DISPLAY SHOWS
ERROR "A 03"
LYNX BOILER SEQUENCE OF OPERATION
THERMOSTAT CALLS FOR HEAT
CIRCULATOR(S) ON
COMBUSTION BLOWER ON
(AT MEDIUM SPEED)
NO
BLOWER SPEED CONFIRMED?
5 SECOND PRE-PURGE PERIOD
NO
WATER HIGH LIMIT
CLOSED?
TRIAL FOR IGNITION
SPARK IGNITOR ENERGIZED
FOR 3.5 SECONDS
GAS VALVE OPENS
FOR 2.5 SECONDS
SPARK CONTINUES FOR
2.5 SECONDS
SPARK IGNITOR DE-ENERGIZED
GAS VALVE REMAINS OPEN FOR
3.5 SECONDS
FLAME SIGNAL SENSED?
GAS VALVE REMAINS OPEN. CONTROL
CONTINUOUSLY MONITORS
THERMOSTAT, HIGH LIMIT, WATER
SENSORS, BLOWER SPEED, FLAME
SIGNAL, AND LWCO (IF USED).
THERMOSTAT CALL FOR HEAT ENDS
GAS VALVE CLOSES
10 SECOND BLOWER POST PURGE.
15 SECOND CIRCULATOR POST PURGE.
YES
YES
YES
CONTROL LOCKOUT
DISPLAY SHOWS
ERROR "A 01"
NO
3 TRIALS FOR
IGNITION WITH NO
FLAME SENSED?
2 TIMES RETRIALS
FOR IGNITION
GAS VALVE CLOSED.
BLOWER POST PURGE
10 SECONDS.
Lynx
YES