Buderus Logano GA244 Installation, Operation And Maintenance Manual page 30

11 Placing the Boiler in Operation
counterclockwise to decrease the manifold
pressure. This adjustment must be made while the
boiler is in operation.
11. After adjustment, record pressure on the form on
page 33, and install the capscrew (Fig. 26, Item. 5)
on the gas control valve. Shut the test port screw for
manifold pressure measurement.
12. Observe the pilot flame (Fig. 27, Item. 2) through
viewing port (Fig. 27, Item. 1) in the burner cover
plate. The flame should envelop the flame sensor
1/2 to 1 1/2 inch, see (Fig. 27, Item. 1). If the pilot
flame is satisfactory then go to step 13. If the pilot
flame is too small or too large, adjust the pilot using
pilot adjustment screw. Turn the inner adjustment
screw (Fig. 26, Item. 4) clockwise to decrease, or
counterclockwise to increase the pilot flame. After
adjustment, replace the cover screw (Fig. 26,
Item. 4) and tighten firmly.
13. Observe the main burner flame (Fig. 28, Item. 1)
through the viewing port (Fig. 25, Item. 1) in the
burner cover plate. The flame should have a
smooth, firm contour and must be mostly blue color.
If the main burner flame is satisfactory then go to
step 14. If the main burner flame is lazy, yellow, or
lifting off the burners, turn the gas control knob
(Fig. 26, Item. 1) to "OFF". Shutt off the main gas
supply shut-off valve. Disconnect all electric power
to the appliance and call your technician or gas
supplier.
14. The ignition safety shut-off must be tested. Test the
safety shut-off by shutting off the main gas piping
shutoff valve.
The main burner and pilot flame (Fig. 27, Item. 2)
will extinguish. Within six (6) seconds the gas control
main gas solenoid should close and make an
audible sound. The ignition will spark.
After 90 seconds, the module should go into lock out
mode and the spark should stop. Disconnect the
electric power to the appliance. Open the main gas
shutoff valve. Turn on the electric power to the unit.
A normal operating sequence should occur. If the
gas control functions satisfactorily then go to step
15. If the gas control does not function satisfactorily,
immediately turn the gas control knob (Fig. 29,
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
30
2
1
Fig. 27 Pilot flame
Item. 1: 1/2" to 1 1/2"
Item. 2: Pilot flame
1
Fig. 28 Main gas burner
Item. 1: Main burner flame
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de