36 | Jaguar Model |
JAGUAR MODEL J-390 SEQUENCE OF OPERATION
CONTROL LOCKOUT |
| NO |
DISPLAY SHOWS |
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ERROR “A 33” |
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THERMOSTAT CALLS FOR HEAT
CIRCULATOR(S) ON
COMBUSTION BLOWER ON
(AT MEDIUM SPEED)
BLOWER SPEED CONFIRMED?
YES
5 SECOND
TRIAL FOR IGNITION - 6 SECONDS
SPARK IGNITOR ENERGIZED
CONTROL LOCKOUT
DISPLAY SHOWS
ERROR “A 01”
NO
CONTROL LOCKOUT
DISPLAY SHOWS 
NO ERROR “A 03”
GAS VALVE OPENS
WATER HIGH LIMIT CLOSED?
YES
GAS VALVE REMAINS OPEN
FOR 4 SECONDS
SPARK IGNITOR
3 TRIALS FOR | YES | |
IGNITION | ||
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WITH NO FLAME SENSED? |
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2 TIMES RETRIALS
FOR IGNITION
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| NO | GAS VALVE CLOSED. | ||
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FLAME SIGNAL SENSED? |
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| BLOWER POST PURGE | |
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| 10 SECONDS. | |||
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| YES |
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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.
