Operating instructions

GALAXY 18
SEQUENCE OF OPERATION FOR GALAXY BOILERS EQUIPPED WITH CONTINUOUS BURNING PILOT
(HONEYWELL OR WHITE RODGERS)
LIGHTED PILOT HEATS THERMOCOUPLE AND KEEPS PILOTSTAT OPEN.
HIGH-LIMIT CONTACTS CLOSED?
LOW WATER CUT-OFF (WHEN USED) CONTACTS CLOSED?
PRESSURE CUT-OUT (WHEN USED) CONTACTS CLOSED?
VENT DAMPER RELAY ENERGIZED.
VENT DAMPER MOTOR MOVES OPEN (VENT DAMPER OPENS).
END SWITCH CLOSES.
MAIN VALVE OPERATOR OPENS.
LIT PILOT IGNITES MAIN BURNERS.
IF PILOT SHOULD BLOW OUT, THERMOCOUPLE WILL SHUT OFF MAIN BURNERS.
WHEN THERMOSTAT IS SATISFIED MAIN VALVE OPERATOR CLOSES. VENT DAMPER CLOSES.
CIRCULATOR OFF. SYSTEM GOES TO STANDBY WITH LIT PILOT.
THERMOSTAT CALLS FOR
HEAT
LOW LIMIT (FOR TANKLESS COIL)
CALLS FOR HOT WATER
IF BOILER SHUTS DOWN ON HIGH LIMIT OR OTHER LINE VOLTAGE SAFETY CONTROLS, THE
DAMPER WILL REMAIN OPEN
NO FURTHER
ACTION
OR
NO
YES
HIGH-LIMIT CONTACTS CLOSED?
LOW WATER CUT-OFF (WHEN USED) CONTACTS CLOSED?
PRESSURE CUT-OUT (WHEN USED) CONTACTS CLOSED?
VENT DAMPER RELAY ENERGIZED.
VENT DAMPER MOTOR MOVES OPEN VENT DAMPER.
END SWITCH CLOSES.
IGNITION CONTROL ENERGIZED
SPARK GENERATOR MODULE POWERED
S8600F OR S8600M: IGNITION SPARK STARTS AND PILOT VALVE OPERATOR OPENS.
S8670E: IGNITION SPARK AND PILOT VALVE OPERATOR DELAYED FOR 30-70 SECONDS.
L.P. PROPANE GAS
(S8600M AND S8670E)
IGNITION TRIAL
CONTINUES FOR 90
SECONDS. AFTER TRIAL
FOR IGNITION, SYSTEM
SHUTS OFF. AFTER 5
MINUTES MODULE
RE-INSTATES TRIAL FOR
IGNITION. IF PILOT FLAME
NOT ESTABLISHED,
IGNITION TRIAL, SYSTEM
SHUT-OFF AND 5
MINUTES WAIT
SEQUENCE REPEATS
CONTINUOUSLY.
NATURAL GAS (S8600F)
IGNITION SPARK CON-
TINUES. PILOT VALVE
REMAINS OPEN UNTIL
SYSTEM IS RESET.
SPARK GENERATOR OFF. MAIN VALVE OPERATOR OPENS. MODULE MONITORS PILOT FLAME.
THERMOSTAT CALLS FOR
HEAT
MODELS WITH
VENT DAMPERS
LOW LIMIT (FOR TANKLESS COIL)
CALLS FOR HOT WATER
THE PILOT FLAME ESTABLISHED?
WHEN THERMOSTAT IS SATISFIED VALVE OPERATORS CLOSE, VENT DAMPER CLOSES. CIRCULATOR OFF. SYSTEM GOES TO STANDBY.
IF BOILER SHUTS DOWN ON HIGH LIMIT OR OTHER LINE VOLTAGE SAFETY CONTROLS, THE DAMPER WILL REMAIN OPEN
NO FURTHER
ACTION
OR
NO
NONO
YES
YES
SEQUENCE OF OPERATION FOR GALAXY BOILERS EQUIPPED WITH HONEYWELL INTERMITTENT
PILOT IGNITION SYSTEM (IID)