Important
For use with G31 gas, add two extra turns to the OFFSET
adjustment screw.
1 Gas flow rate setting screw
The settings screw is screwed down as far as it will go and is then
unscrewed according to the number of turns given in the above
table.
2 OFFSET setting screw:
1
.
Remove the plug
2
.
Use a 4 mm hexagonal spanner
3 Gas supply pressure outlet
1 Gas flow rate setting screw
The settings screw is screwed down as far as it will go and is then
unscrewed according to the number of turns given in the above
table.
2 OFFSET setting screw:
1
.
Remove the plug
2
.
Use a flat-blade screwdriver
3 Sealed chamber pressure signal
4 Gas supply pressure outlet
For more information, see
Checking the gas inlet, page 56
7.4.5
CO
2
checking and setting values
Tab.29 Checking and setting values for gas type G20
Unit
SIRIUS THREE FS
50
SIRIUS THREE FS
70
SIRIUS THREE FS
90
SIRIUS THREE FS
110
Diameter of the Venturi
mm
24
30
34
38
Diameter of the nozzles
mm
3.70 (no. 2)
5.30 (no. 2)
5.60 (no. 2)
6.40 (no. 2)
Maximum CO
ppm
< 250
< 250
< 250
< 250
Fig.67
Description of the gas valve for
SIRIUS THREE FS 50 and SIRIUS
THREE FS 70
MW
-3
0
0
0
0
4
5
-0
3
1
2
3
Fig.68
Description of the gas valve for
SIRIUS THREE FS 90 and SIRIUS
THREE FS 110
MW
-3
0
0
0
0
4
7
-0
3
3
1
2
4
7 Commissioning
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