Sequence Of Operation Of Galaxy Ii Boilers - Slant/Fin GALAXY II GXHII-95 Installation And Operating Instructions Manual

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SEQUENCE OF OPERATION FOR GALAXY II BOILERS
CIRCULATOR IS OFF UNTIL
BOILER WATER TEMPERATURE
REACHES 120˚F
L.P. PROPANE GAS
(S8600H) IGNITION TRIAL
CONTINUES FOR 90 SEC-
ONDS. AFTER TRIAL FOR
IGNITION, SYSTEM SHUTS
OFF. AFTER 5 MINUTES
MODULE RE-INSTATES
TRIAL FOR IGNITION. IF
PILOT FLAME NOT ESTAB-
LISHED, IGNITION TRIAL,
SYSTEM SHUT-OFF AND 5
MINUTES WAIT SEQUENCE
REPEATS CONTINUOUSLY.
SPARK GENERATOR OFF. MAIN VALVE OPERATOR OPENS. MODULE MONITORS PILOT FLAME.
WHEN THERMOSTAT IS SATISFIED OR WHEN HIGH LIMIT, LOW LIMIT, OR LOW WATER CUT-OFF CONTACTS ARE OPEN,
VALVE OPERATORS CLOSE, VENT DAMPER CLOSES. CIRCULATOR OFF. SYSTEM GOES TO STANDBY.
THERMOSTAT CALLS
FOR HEAT
HIGH-LIMIT CONTACTS CLOSED?
VENT DAMPER RELAY ENERGIZED.
VENT DAMPER MOTOR MOVES OPEN VENT DAMPER.
IGNITION CONTROL ENERGIZED
SPARK GENERATOR MODULE POWERED
S8600H OR S8600M: IGNITION SPARK STARTS AND PILOT VALVE OPERATOR OPENS.
NO
THE PILOT FLAME ESTABLISHED?
LOW LIMIT (FOR BOILERS WITH
TANKLESS COIL) CALLS
OR
FOR HOT WATER
YES
END SWITCH CLOSES.
YES
GALAXY II
NO
NO FURTHER
ACTION
NATURAL GAS (S8600M)
IGNITION SPARK CON-
NO
TINUES. PILOT VALVE
REMAINS OPEN UNTIL
SYSTEM IS RESET.