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We reserve the right to make any changes due to technical modifications!
Installation, Operation and Maintenance Manual Sealed Combustion Gas Boiler Logano GA244 • Issue 02/2004
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
Maintenance12
START
Thermostat (Controller) calls for heat
Fan motor starts operating.
Spark generator powered
• Pilot valve opens.
If flame current sensed
• Spark generator off
• Main valve operator opens
Main burner operation
• S 8600 H monitors pilot flame current
Thermostat (controller) satisfied
Main and pilot valve close, burners shut off.
Fan motor is shut off.
Pilot burner operation
Pilot burner light,S 8600 H senses
flame current.
or
Pilot burner does not light.
S 8600 H trial for ignition continues for
90 seconds and locks out.
END
Stage 1
Trial for ignition
Stage 2
Main burner
operation
Power interuptions
System shuts off. Restarts
when power restored?
Pilot flame failure
Main valve closes,
S 8600 H starts trial for
ignition.
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