Atlantic Boilers VF 40 - Page 31

page 32/41
- Setting up a replacement gas valve
Before starting up the burner, adjust
the gas valve screw as the table below
- S tart the burner at maximum output
Using an analyser, measure the %CO2
Adjust the gas valve screw to a setting within the table below
- A djust the burner to minimum output
And repeat the exercise as described above
- Return to maximum and minimum settings
In turn, until the positions are stabilised
Return the boiler to normal setting
VF
gas
valve
Gas
Adjustment to regulator
CO
2
Pmax
CO
2
Pmin
60
GB-WND
055
D01 S20
G20 Screw R1 1.5 turn clockwise 8,7 - 8,9 8,4 - 8,6
100
SIT 822
Novamix
G20 Screw R1 1.5 turns anti-clockwise 8,7 - 8,9 8,4 - 8,6
1 – upstream gas tapping
2 – mid stream gas tapping
3 – air tapping
5 – gas screw adjustment R1
6 – air screw adjustment R2
VF 100
+
R1
-
+
R2
-
VF 60
air tapping gas tapping
gas screw adjustment
-
R1
+
-
R2
+
air screw adjustment
tapping to measure %CO2
flue gas outlet