Buderus Logano GA124 Installation And Maintenance Instructions Manual page 42

9 Placing the heating system in operation
15. Observe ignition flame through the sight glass
( Fig. 39, page 40) in the burner housing.
16. The flame must envelope the flame guard 1/2 to
1 1/2 inches. If this is the case continue with step 20.
17. If the ignition flame is too small or too large, the
pressure for the pilot burner must be adjusted with
the corresponding adjustment screw.
USER NOTE
The adjustment screw is behind the
ignition gas pressure adjustment safety
screw ( Fig. 40, page 41).
18. Remove safety screw for pilot ignition pressure
setting ( Fig. 40, page 41). Turn the inner
adjustment screw clockwise to reduce the ignition
flame and counterclockwise to enlarge the ignition
flame.
19. After adjustment tighten the ignition gas pressure
adjustment safety screw (
20. Observe main burner flame through the sight glass
( Fig. 39, page 40) in the burner housing. The
flame must have a steady and fixed contour and
generally has a bluish color. If the main burner flame
meets the requirements, proceed with step 21. If the
main burner flame is too weak or is yellow or goes
out, turn the ON/OFF switch (
the gas valve clockwise to OFF. Close the gas valve
and disconnect the heating system from the power
supply and contact the customer service technician
or the gas company.
Checking flame sensor
21. Test the safety switch by closing the gas valve. The
main burner flame (
( Fig. 41) are extinguished. After six (6) seconds
at the most the main gas solenoid valve on the gas
valve must close with an audible noise.
22. After 90 seconds the automatic igniter must switch
to lock status and stop generating sparks.
23. Disconnect the heating system from the power
supply. Open main gas valve. Switch on unit power
supply. A normal operating cycle must follow.
24. If the gas valve operates correctly, proceed to step
25. If the gas valve does not operate correctly,
switch ON/OFF switch (
clockwise to the OFF position immediately. Close
main gas valve. Disconnect heating system from the
power supply and inform the customer service
technician or LP gas company.
42 Installation and maintenance instructions Logano GA124 special gas-fired boiler • Issue 04/2005
Fig. 40, page 41) again.
Fig. 40, page 41) on
Fig. 42) and the ignition flame
Fig. 43) on the gas valve
1
Fig. 41 Correct pilot flame setting
1 1/2 to 1 1/2 inches
2 Pilot flame
1
Fig. 42 Main burner
1 Main burner flame
We reserve the right to make any changes due to technical modifications.
2