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00RNO0333-B (U0625869)
EVO S -
Installation and Servicing
4.5.2.
Changing the ignition, pre-ventilation, minimum and maximum speeds
Place the boiler in standby mode (see § 3.3.1 of the NAVISTEM B3000 boiler
command table instructions).
If necessary, press the ESC button to return to the main screen.
Open the
Settings / Safety unit
menu.
Adjust the pre-ventilation speed (9504), ignition speed (9512), minimum
speed (9524) and maximum speed (9529) settings:
Models
Gas
9504
9512
9524
9529
50
G20
3130
3130
1920
7250
G31
2790
2470
1840
6900
70
G20
2450
2300
1760
5480
G31
2770
2770
2770
5330
95
G20
2750
2350
1750
6450
G31
2750
2550
2550
6250
figure 11 -
EVO S 50 settings
4.5.3. Adjustment of the gas valve
- Before starting the burner, on the gas valve,
preset the gas flow rate, using the gas flow rate
adjustment screw R1, to the appropriate value
given in the table below.
- Start the burner at maximum power.
- Using a combustion analyser, measure the CO
2
ratio in the exhaust gases: on the gas duct,
remove the plug from the opening and insert the
CO
2
measurement sensor into the centre of the
flow in the exhaust duct.
- Check the CO
2
value at maximum power Qmax
and, if necessary, adjust the gas flow screw R1 of
the valve in order to obtain the CO
2
values in the
table below.
- Change to minimum power Qmin and check that
the CO
2
value is within the range in the table
below. If necessary, use the setting adjustment
screw R2.
R1
R2
U0561579-#
