14
9.
Reduce the nozzle pressure at the
l.h.
gas train (BV1) with hexagon
screw
C
to 0 (no end-stop).
Note
Turning anti-clockwise: Nozzle pres-
sure decreases.
Note
The flame of the main burner extin-
guishes and the flame of the pilot burner
stays lit.
Adjusting the r.h. gas train (BV2)
0
1.
Remove the pressure gauge from
bottom test nipple
F
of the
l.h.
gas
train (BV1) and seal aperture with
screw.
0
2.
Open the screw at bottom test nip-
ple
F
of the
r.h.
gas train (BV2) by
one full turn.
0
3.
Connect the pressure gauge at bot-
tom test nipple
F
of the
r.h.
gas
train (BV2) to check the nozzle pres-
sure.
0
4.
Connect plug
B
to the
r.h.
gas train
(BV2).
0
5.
Counterhold Phillips screw
D
.
0
6.
Adjust the nozzle pressure at the
r.h.
gas train (BV2) with hexagon
screw
C
in accordance with the
value in the table on page 16.
0
7.
Check the setting values and record
them in the report.
0
8.
Pull one of the two plugs
a:Ö
E
from the modulation coil on the gas
train.
Note
The flame of the main burner extin-
guishes.
0
9.
Test the nozzle pressure at partial
load.
In case of deviation from the value
in the table on page 16:
■ Counterhold hexagon screw
C
.
■ Adjust the nozzle pressure at Phil-
lips screw
D
.
10.
Check the setting values and record
them in the report.
11.
Reconnect the plug
a:Ö
E
previ-
ously pulled from the modulation
coil on the gas train.
Adjusting the l.h. gas train (BV1)
0
1.
Disconnect plug
B
from the
r.h.
gas train (BV2).
0
2.
Remove the pressure gauge from
bottom test nipple
F
of the
r.h.
gas
train (BV2) and seal aperture with
screw.
0
3.
Connect the pressure gauge at bot-
tom test nipple
F
of the
l.h.
gas
train (BV1) to check the nozzle pres-
sure.
0
4.
Counterhold Phillips screw
D
.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 704 GB