IDEAL EVO S 50 Installation And Servicing page 28

EVO S - Installation and Servicing
4.5.2. Changing the ignition, pre-ventilation, minimum and maximum speeds
4.5.3. Adjustment of the gas valve
R2
figure 11 - EVO S 50 settings
28 / 136
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
G20
50
G31
G20
70
G31
G20
95
G31
R1
U0561579-#
9504 9512
3130 3130
2790 2470
2450 2300
2770 2770
2750 2350
2750 2550
- 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
ratio in the exhaust gases: on the gas duct,
remove the plug from the opening and insert the
CO measurement sensor into the centre of the
2
flow in the exhaust duct.
- Check the CO value at maximum power Qmax
2
and, if necessary, adjust the gas flow screw R1 of
the valve in order to obtain the CO
table below.
- Change to minimum power Qmin and check that
the CO value is within the range in the table
2
below. If necessary, use the setting adjustment
screw R2.
9524 9529
1920 7250
1840 6900
1760 5480
2770 5330
1750 6450
2550 6250
values in the
2
00RNO0333-B (U0625869)
2