Buderus Logano G124X II/SP Installation And Maintenance Instructions Manual page 34

11 Placing the heating system in operation
15. Observe pilot flame through the sight glass
( Fig. 29, page 32) 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 pilot 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 pilot
burner pressure adjustment safety screw
( Fig. 30, page 33).
18. Remove safety screw for igniter orifice pressure
setting ( Fig. 30, page 33). Turn the inner
adjustment screw clockwise to reduce the pilot flame
and counterclockwise to enlarge the pilot flame.
19. After adjustment tighten the pilot gas pressure
adjustment safety screw (
again.
20. Observe main burner flame through the sight glass
( Fig. 29, page 32) 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 (
on the gas fitting 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 shut-off.
The main burner flame (
flame ( Fig. 31) are extinguished. After six (6)
seconds at the most the main gas solenoid valve on
the gas fitting must close with an audible noise.
22. After 90 seconds the ignition module 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 fitting operates correctly, proceed to step
25. If the gas fitting does not operate correctly,
switch ON/OFF switch (
clockwise to the OFF position immediately. Close
main gas shut-off. Disconnect heating system from
the power supply and inform the customer service
technician or LP gas company.
34 Installation and maintenance instructions Logano G124X II/SP special gas-fired boiler • Issue 04/2005
Fig. 30, page 33)
Fig. 30, page 33)
Fig. 32) and the ignition
Fig. 33) on the gas fitting
1
Fig. 31 Correct pilot flame setting
1 1/2 to 1 1/2 inches
2 Pilot flame
1
Fig. 32 Main burner
1 Main burner flame
We reserve the right to make any changes due to technical modifications.
2