CLAS HE R - Installation & Servicing Manual

commissioning menu 2 -

commissioning menu 2 - Boiler parameters NOTE: To access the menus, see page 42 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% (“99” on the display) and 0% (“0”). 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). Checking slow ignition power The soft light can be adjusted between the maximum power (shown on the display as “99”, 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 (0), 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. 38 35 30 25 24 18 12 gas setting parameters 12 kW 18 kW 24 kW G20 G31 G20 G31 G20 G31 lower Wobbe index (15°C, 1013 mbar) (MJ/m3) 45,67 70,69 45,67 70,69 45,67 70,69 slow ignition 220 50 60 50 60 50 60 minimum fan speed(%) 233 00 00 02 02 05 05 maximum output fan speed (%) 234 70 70 80 80 85 85 gas valve restrictor(ø) 4,40 3,10 NO 3,80 NO 3,80 gas flow max/min (15°C, 1013 mbar) (nat - m3/h) (GPL - kg/h) max D.H.W 1,27 0,93 1,90 1,40 2,65 1,94 max C.H. 1,27 0,93 1,90 1,40 2,33 1,71 min 0,32 0,23 0,48 0,35 0,58 0,43 38

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 flue 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. 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 commissioning Maximum or 12 kW 18 kW 24 kW minimum CO 2 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 N.B: when the front combustion chamber panel is open, the CO2 value drops by 0.3%. If the values taken differ 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. 8 2 50 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. Maximum gas flow 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. Only a 2.5 mm allen key must be used. Do not use a screwdriver Minimum gas flow 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 differ 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 allen key) - unscrew to lower the CO2 value - tighten to increase the CO2 value 51 Only a 4 mm allen key must be used. Do not use a screwdriver 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. 39