Buderus Logano GA244 Installation, Operation And Maintenance Manual page 46

12 Maintenance
Spark across ignitor/sensor gap
(look through sight glass)
Turn gas supply on.
Pilot burners lights.
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
46
NO
Checking the S 8600 ignition module.
•
Check for 24 V between terminals 3 and 4 of the terminal strip.
(Power supply to S8600 ignition module)
If present:
•
Check wiring between terminal strip and S8600 module.
•
Check position of ignition cable plug on ignition sensor ceramic
insulator.
•
Check ignition cable, ground wiring, ignition sensor ceramic
insulator and gap. Set gap to 3 - 4 mm. (1/8" to 1/6").
•
Check boot of the ignition cable for signs of melting or
buckling.
•
If everything checks okay, replace S8600 ignition module.
Checking the flame roll-out switch.
•
Check for 24 V between terminals 2 and 3 of terminal strip.
If no 24 V present, check wiring between terminal strip and flame
roll-out switch. Check for continuity of flame roll-out switch.
If open circuit, replace flame roll-out switch.
Checking the pressure switch.
• Check for 24 V between terminals 1and 2 of terminal strip.
If no 24 V present, do following:
• Check wiring between pressure switch and terminal strip on boiler block.
• Check exhaust and air intake piping for blockage.
• Check air intake hose of boiler for blockage and ensure full
diameter.
• Check for blocked heat exchanger of the boiler.
• Check total length of exhaust and air intake piping versus
listed tables Table 7 to Table 9 on page 24 and page 25.
If everything checks okay: replace pressure switch.
NO
Checking gas valve and S 8600 module.
•
Check that all manual gas valves are open, supply tubing and pressures
are good and pilot burner orifice is not blocked.
•
Before first start-up, purge the air from gas supply pipe.
•
Check electrical connections between module and pilot operator on gas
control.
•
Check for 24 V across MV-MV/PV terminals on module. If voltage is fine,
replace gas control. If not, replace module.
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de