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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
Maintenance
12
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.
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.
Spark across ignitor/sensor gap
(look through sight glass)
NO
NO
Turn gas supply on.
Pilot burners lights.
