01/2005 - Art. Nr. 13 010 553B
46
Start up
NC9 GX107/8
106 Filter
119 Pressaure take offs
F4
Pressure switch
Y15 Safety valve
Y13 Nominal valve
104 Pressure controller
D2
p
G
p
S
4
7
10
15
4
7
10
15
20
mbar
mbar
Important
All measurements are to be performed
using precision pressure gauges.
Ignition pressure setting: screw PS
Ignition pressure is set to 4mbar or
40daPa.This function ensures reduced
pressure on ignition for a few seconds,
increasing then to rated pressure
PG
.
The sector graduated from 4 to 15mbar
(i.e.40 to 150daPa), shows the settings
required for screw
PS
according to the
rated burner output.
Rated pressure setting: screw PG
The sector graduated from 4 to 20mbar
(i.e. 40 to 200daPa) shows the setting
required for screw
PG.
Adjust according to rated burner output
(table page 50).
Important
:
pS
must always be beneath
pG
.
Gas pressure switch F4
Purpose
This device controls the minimum
distribution pressure (see table).
This step is performed after setting the
required power rating.
Adjustment
·
Remove the cover.
To increase factory-set pressure:
·
Turn disc
E
clockwise (
+
) and vice
versa.
Each turn alters the pressure value
by approximately 40daPa.
Allow for the differential (15 to
25daPa).
10
40
20
30
p
n
p
min
20
25
37
17
20
25
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