Ariston CLAS HE R 12 Installation And Servicing Instructions

39
commissioning
Test function and combustion analysis
The boiler has two pressure test points to measure
the combustion gas temperature, the combustive air
and the concentrations of O2 and CO2 on the outside
of the ue gas header.
To access these pressure test points, unscrew the
screw which holds the blanking cover and its seal
together.
Checking the gas setting
To carry out combustion analysis, the test function
must be activated.
Maximum gas ow combustion analysis
Activate the test function at the maximum heating
power, press the + button.
Wait for the boiler to stabilise before carrying out the
combustion analysis. Check the CO2 value according
to the table opposite.
N.B: when the front combustion chamber panel is
open, the CO2 value drops by 0.3%.
If the values taken dier from the table, adjust the gas
valve following the procedure described below.
Adjust the CO2 content to
± 0.2 by turning setting
screw 50 (2.5 mm allen key)
- tighten to lower the CO2 value
- unscrew to increase the CO2 value
Set the content by turning the screw about a 1/4 of a
turn then wait after each change for approximately 1
minute for the CO2 value to stabilise, then repeat.
Minimum gas ow combustion analysis
Activate the test function at minimum power by
pressing the - button.
Wait for the boiler to stabilise before carrying out the
combustion analysis. Check the CO2 value according to
the table above.
Important: do not remove silencer 13
N.B: when the combustion chamber is open, the
CO2 value drops by 0.3%.
If the values taken dier from the table, adjust the gas
valve following the procedure described below.
To adjust the CO2 value, remove cap
2, adjust the CO2
content to ± 0.2 by turning setting screw 51 (4 mm al-
len key)
- unscrew to lower the CO2 value
- tighten to increase the CO2 value
Set by turning the screw about a 1/4 of a turn then wait
after each change for approximately 1 minute for the
CO2 value to stabilise, then repeat.
Once the settings and analyses are complete, exit test
mode, and reposition the blanking cover and its seal
correctly.
Maximum or
minimum CO
2
12 kW
18 kW
24 kW
CO
2
(%)
G20
9.0 ± 0.2
9.2 ± 0.2
9.3 ± 0.2
G31
10.2 ± 0.2
10.3 ± 0.2
10.2 ± 0.2
8
50
Only a 2.5 mm allen
key must be used. Do
not use a screwdriver
2
Only a 4 mm allen key
must be used. Do not
use a screwdriver
51
Test function
The PCB allows the appliance to be forced to minimum
or maximum power.
Activate the test function by pressing the Reset
button for 5 seconds, the boiler switches to maximum
heating power, the following appears on the display:
To select the function at maximum domestic hot
water, press the button, the following appears
on the display :
To select the function at minimum domestic hot
water, press the button, the following appears
on the display :
The function is automatically deactivated after 10
minutes or by pressing the Reset button.
Note: the appliance can be forced to minimum or
maximum power from menu 7 (see the section on
the display - setting - diagnostics menu).
WARNING! By activating the test function, the
temperature of the water sent to the installation is
limited to 88°C; caution is therefore required with
regard to low-temperature installations.

Ariston CLAS HE R 12 Specifications

General

Brand	Ariston
Model	CLAS HE R 12
Category	Boiler
Language	English