Ariston CLAS ONE R 24 Installation And Servicing Instruction page 31

Operation 4 - Checking the CO2 at minimum gas flow
With the Test function active, press the 2
icom and . The boiler is forced to the minimum power.
Wait 1 minute for the boiler to stabilise before carrying out the
combustion analyses.
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 turn
corresponds to 0.2% of CO2.
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 flow.
Operation 5 - Ending the adjustment
Exit cleaning mode by pressing RESET.
Stop the draw-off.
Verify and repair any leaks of gas.
Refit the front panel to the device.
Refit the blanking cover at combustion test point.
button to select the
If the CO2 value (%) read
differs by 0.5 % from the
value found, then adjust
the gas valve following the
instructions below, otherwise
move directly onto operation
5.
Adjusting the gas valve to
minimum gas flow
menu 2 - Boiler parameters
submenu 3 - parameter 1 Maximum Heating Power adjustment
submenu 2 - parameter 0 Soft light Ignition
submenu 3 - parameter 5 Heating ignition delay
Maximum Heating Power adjustment
The maximum heating power can be adjusted to between the
maximum power allowed by the boiler and the minimum power).
The display shows the value between 100% ("100" on the
display) and 0% ("0") of this interval.
To check the maximum heating power, access menu 2/sub menu
3/parameter 1, check the value and, if necessary, modify it as
indicated in the Gas Regulation table below. (See page 40 for
more details).
Checking slow ignition power
The soft light can be adjusted between the maximum power
(shown on the display as "100", i.e. 100%) and the minimum
power (shown on the display as "1", i.e. 1%).
To check the slow ignition power, access menu 2/sub menu 2/
parameter 0.
Heating ignition delay adjustment
This parameter – menu 2/sub menu 3/parameter 5 - can be used
to manually (0) or automatically (1) set the delay time before the
subsequent reignition of the burner after it has switched off on
reaching the desired temperature in central heating mode.
By selecting manual, it is possible to set the delay in minutes
using the successive parameter (menu 2/sub menu 3/parameter
6), to a time between 0 and 7 minutes.
Automatic selection means that the boiler will establish the
delay time based on the set-point temperature
3.4
COMMISSIONING
21.4
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