Ariston EGIS PREMIUM S 25, Installation And Servicing Instructions

Page: 41 / 52

41
commissioning
Operation 4 - Checking the CO2 at minimum gas fl ow
Whit the Cleaning function active,
press the button 1 to select the icom
(Minimum Power)
Wait 1 minute for the boiler to stabilise
before carrying out the combustion
analyses.
If the CO2 value (%) read di
ff ers by
0.5 % from the value found whilst adjusting the maximum gas fl ow,
then adjust the gas valve following the instructions below, otherwise
move directly onto operation 5.
Adjusting the gas valve to minimum gas fl ow
Remove cap and adjust screw
2
by turning anti-clockwise in
increments to reduce the CO2
level. Wait 1 minute after each
adjustment for the CO2 value to
stabilise.
WARNING! this adjustment is
sensitive: a rotation of a 1/4
turn corresponds to 0.4% of
CO2.
Once the CO2 value is close to
the values given in the setting
table, re fi t cap 2, then close
the casing cover and measure the fi nal CO2 value (%) after waiting one
minute. If the value measured corresponds to the value given in the table,
adjustment is complete, otherwise start the setting procedure again.
Attention! If the value of the CO2 at the minum power has been
changed, it is necessary repet the adjusting at maximum gas fl ow.
Operation 5 - Ending the adjustment
Exit cleaning mode by pressing RESET.
Stop the draw-o ff .
Verify and repair any leaks of gas.
Re fi t the front panel to the device.
Re fi t the blanking cover for the combustion outlets.