Instructions for High Altitude Conversion
9
We reserve the right to make any changes due to technical modifications!
Instructions for High Altitude Conversion for Sealed Combustion Gas Boiler GA244 • Issue 02/2004
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
10.
Check manifold pressure. Set the manifold pressure
according to the values in Table 3. To adjust the
manifold pressure (Fig. 8,
Pos. 5
) remove the
capscrew from the gas control. Turn the pressure
regulating adjusting screw clockwise to increase, or
counterclockwise to decrease the manifold
pressure. This adjustment must be made while the
boiler is in operation.
11.
After adjustment, record pressure in the start-up
procedure, and install the capscrew on the gas
control (Fig. 8,
Pos. 5
).
12.
Observe the pilot flame (Fig. 9,
Pos. 2
) through
viewing port (Fig. 7,
Pos. 1
) in the burner cover
plate. The flame should envelop the flame sensor ½
- 1-½ inch, see (Fig. 9,
Pos. 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. Turn the inner adjustment screw
(Fig. 8,
Pos. 4
) clockwise to decrease, or
counterclockwise to increase the pilot flame. After
adjustment, replace the cover screw and tighten
firmly (Fig. 8,
Pos. 4
).
13.
Observe the main burner flame (Fig. 10,
Pos. 1
)
through the viewing port (Fig. 7,
Pos.
1) in the
burner cover plate. The flame should have a
smooth, firm contour and must be mostly blue in
color. If the main flame is satisfactory, go to step 14.
If the main burner flame is lazy, yellow, or lifting off
the burners, turn the gas control knob (Fig. 8,
Pos. 1
) clockwise to “OFF“. Shut off the main gas
piping shutoff valve. Disconnect all electric power to
the appliance and call your service 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
shut-off valve.
The main burner and pilot flame (Fig. 9,
Pos. 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. 11,
Pos. 1
) clockwise to "OFF".
GA244
Natural gas
[inch W.C.]
Propane
[inch W.C.]
37
3.77
8.03
44
3.65
7.63
53
3.73
8.11
62
3.77
6.15
Table. 3 Required manifold pressure
Fig. 9
Proper pilot flame
Item. 1:
1/2“ to1 1/2“
Item. 2:
Flame
1
2
Fig. 10
Main burner
Item. 1:
Main burner flame
1
