Checking And Adjusting The Gas/Air Ratio - Buderus Logamax Plus GB142-24 Installation Instructions Manual

8 Start-up procedure
 Press the "Chimney Sweep"
approx. two seconds) until the display shows a decimal
point.
 Measure the gas connection pressure as soon as the
"Burner" LED lights and enter this value in the start-up
report.
The inlet gas pressure must be:
– for natural gas - min. 3.5 to 10.5 inch W.C (8.7 to
26.1 mbar), nominal supply pressure 7.0 inch W.C.
(17,4 mbar)
– for LPG - min. 8.0 to 13.0 inch W.C. (19.9 to 32.3 mbar),
nominal supply pressure 11.0 inch W.C. (27.4 mbar).
 Repeatedly press the "Service"
temperature indication is displayed.
 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 pressure is too
high.
8.8

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. 36, pos. 1).
 Set the pressure gauge to zero.
 Use a hose to connect the plus terminal of the pressure
gauge to the burner pressure measuring nipple (fig. 36,
pos. 2).
34 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
d
button and hold it (for
e
button until the
d
button to end the
Fig. 36 Checking the gas/air ratio
1
2