Buderus Logamax plus GB142-24 Installation And Servicing Instructions page 32

9 Start-up procedure
Loosen the screw plug on the measuring nipple for
the burner pressure by two rotations (fig. 30, 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. 30, pos. 2).
Switch on the heating system using the main switch.
Press the "Chimney Sweep"
approx. two seconds) until the display shows the
decimal point.
Press and hold the "Chimney Sweep"
"Service" buttons (for approx. five seconds) until
the display shows "
Set the appliance to partial load "
"Chimney Sweep"
"Reset" button (lower values).
Read out the differential pressure.
The differential pressure (p
-0.2 inch W.C. (- 5 Pa) (±0.2 inch W.C. = ± 5 Pa)
(read-out on pressure gauge: -0.4 – 0 inch W.C.=
-10 – 0 Pa).
Enter the value measured in the start-up report.
If the gas/air ratio is not correct it can be adjusted
using the adjustment screw (fig. 31, pos. 1). The
adjustment screw is located behind the cover screw.
Repeatedly press the "Service"
temperature indication is displayed.
Press the "Chimney Sweep"
decimal point is cleared from the display.
Switch off the heating system using the main switch.
Remove the measurement set-up, tighten the screw
in the burner pressure measuring nipple.
Switch on the heating system using the main switch.
We reserve the right to make any changes due to technical modifications!
32
button and hold it (for
and
" (e. g. ).
" by pressing the
button (higher values) or the
– p ) must be
Gas Air
button until the
button until the
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Fig. 30 Checking the gas/air ratio
+
= higher values
Fig. 31 Setting the gas/air ratio
Buderus Hydronic Systems • http://www.buderus.net
1
2
= lower values