Buderus Logano GC124 II/SP Installation And Service Instructions Manual page 32

12 Final start-up procedures for GC124 II models
8. Observe main burner flame through the sight glass
( Fig. 22, page 30) in the burner plate. The flame
must show a steady and stable body and generally
be of bluish color. If the main burner flame meets the
requirements, proceed to step 9. If the main burner
flame is weak, yellow, or goes out, turn the ON/OFF
knob ( Fig. 26) on the gas valve clockwise to OFF.
Close the gas shut-off and disconnect the heating
system from the main power source and contact the
customer service technician or the gas company.
Checking flame rod
9. Test the flame rod by closing the gas shut-off. The
main burner flame (
are extinguished. After no more than six (6) seconds
the main gas solenoid valve on the gas valve must
close with an audible noise. If the gas valve does not
operate correctly, turn ON/OFF knob on the gas
valve clockwise to the OFF position immediately.
Close the main gas shut-off and disconnect the
heating system from the main power source and
contact the customer service technician or the gas
company.
10. After 90 seconds the igniter stops generating sparks
for five (5) seconds.
11. Disconnect the heating system from the main power
source. Open main gas shut-off. A normal operating
cycle must follow.
12. If the main burner flame lights and burns to spec,
proceed to step 13. If not, turn knob on gas valve
clockwise to OFF position immediately. Close main
gas shut-off. Disconnect heating system from the
power source and inform the customer service
technician or gas company.
13. Turn gas valve ON/OFF knob clockwise to OFF
position.
14. Close main gas shut-off.
15. Disconnect heating system from the power source
and set the thermostat to the lowest setting.
16. Remove pressure measuring nipple and pressure
gauge for measuring gas pressure and orifice
pressure from the gas valve, and close the openings
with the screw plugs.
32
Fig. 25) and the ignition flame
Installation and maintenance instructions Gas Boiler Logano GC124 II/SP • Issue 07/2006
1
Fig. 25 Main burner
1 Main burner flame
1
Fig. 26 GC124 II gas valve
1 ON/OFF knob (shown in ON position)
We reserve the right to make any changes due to technical modifications.