Checking And Adjusting The Gas/Air Ratio - Buderus GB142-60 Instruction

LP conversion
3
Press the "Chimney Sweep"
measurement procedure.
Close the gas shut-off valve.
Remove the connection hose again and tighten the
screw plug on the testing nipple.
Open the gas shut-off valve again.
CAUTION
– Contact the relevant gas utility company
if the required inlet gas pressure is not
available.
– Install a gas pressure regulator before
the gas burner fitting if the supply pres-
sure is too high.
3.3 Checking and adjusting the gas/air
ratio
Switch off the heating system using the main switch.
Loosen the screw plug on the measuring nipple for
the burner pressure by two rotations (fig. 7, pos. 1).
Set the pressure gauge to zero.
Use a hose to connect the plus terminal of the pres-
sure gauge to the burner pressure measuring nipple
(fig. 7, pos. 2).
Switch on the heating system using the main switch.
Press the "Chimney Sweep"
(for approx. two seconds) until the display shows the
decimal point.
Press and hold the "Chimney Sweep"
e
vice" buttons (for approx. five seconds) until the
display shows "Lxx" (e. g. L80).
Set the boiler to partial load "L30" by pressing the
d
"Chimney Sweep"
c
"Reset" button (lower values).
8 GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
d
button to end the
d
button and hold it
d
and "Ser-
button (higher values) or the
Fig. 7 Checking the gas/air ratio
+
= higher values
1
2
= lower values