commissioning Operation
commissioning Operation 4 - Checking the CO2 at minimum gas flow With the Test function active, rotate the encoder to select the icom and . The boiler is forced to the minimum power. Wait 1 minute for the boiler to stabilise before carrying out the combustion analyses. 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 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. 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 Converting the appliance from Natural gas to LPG These appliances are designed to operate with different gas types. The appliance must only be converted for use with a different gas type by a Gas Safe Registered installer. To convert the appliance to LPG: (use these instructions in conjunction with the Instruction sheet supplied with the LPG Kit). 1. Electrically isolate the appliance 2. Turn off the gas supply (fig 1) 3. Remove the outer case, lower the front control panel and remove the front combustion chamber panel. 1 4. Remove the green silencer (fig 2) 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). CLAS HE EVO 38 CLAS HE EVO 30 CLAS HE EVO SYSTEM 30 CLAS HE EVO 24 CLAS HE EVO SYSTEM 24 CLAS HE EVO SYSTEM 18 5. Disconnect the gas supply from the venturi assembly (fig 3) 6. Inset the correct diaphragm (depending on the output of the appliance) into the venturi spigot 4 2 7. Reassemble the gas supply onto the venture assembly (fig 4) 8. Turn on gas supply and test for tightness 9. Purge gas supply 10. Turn the electrical supply on to the appliance. 11.Commission the appliance, check the working pressure is adequate then test and adjust the CO2 values at maximum and minimum output described in the commissioning section of the appliance installation instructions. Ensure the flue gas analyser used is calibrated and set for the gas group the appliance is being adjusted for. 12. Check the appliance for gas leaks using gas leak detection fluid. 13. Affix the label to the appliance that is supplied with the conversion kit. 3 36
commissioning Table summarising changes parameter CLAS HE EVO CLAS HE EVO SYSTEM 18 24 30 38 G20 G31 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 45,67 70,69 Slow ignition 220 55 55 60 60 Minimum fan speed (%) 233 19 18 18 19 Maximum central heating fan speed (%) 234 85 76 78 78 Maximum D.H.W fan speed (%) 232 85 91 86 93 Maximum heating power adjstment 231 55 55 60 60 Gas valve restrictor (ø) 3.8 2.9 5.0 3.6 5.7 4.3 6.6 5.0 Gas flow max/min (15°C, 1013 mbar) (nat - m3/h) (GPL - kg/h) max D.H.W 1.90 1.40 2.75 2.02 3.17 2.33 4.02 2.95 max C.H 1.90 1.40 2.33 1.71 2.96 2.17 3.28 2.41 min 0.48 0.35 0.58 0.43 0.69 0.50 0.79 0.58 AUTO function This is a function which enables the boiler to automatically adapt its operation routine (the temperature of the heating elements) in line with the outdoor conditions, in order to achieve and maintain the requested room temperature conditions. Depending on the peripheral units connected and the number of zones controlled, the boiler adjusts its flow temperature automatically. The various corresponding parameters should therefore be set (see adjustments menu). To activate the function, press the AUTO button. Example 1: Single zone system (high-temperature) with on/off room Thermostat: In this case the following parameters must be set: 4 21 - Activation of temperature adjustment using sensors - Select 1 = Basic temperature adjustment 2 44 - Boost Time (optional) The wait time for the flow temperature increase in steps of 4°C may be set. The value varies according to the type of system and installation. If the Boost Time value = 00 the function is not activated. Example 2: Single zone system (high-temperature) with on/off room Thermostat + outdoor sensor: In this case the following parameters must be set: 4 21 - Activation of temperature adjustment using sensors - Select 3 = outdoor sensor only 4 22 - Temperature adjustment curve selection - Select the relevant curve according to the type of system, installation, heat insulation used in the building, etc. 4 23 - Perform a parallel curve shift if necessary, increasing or decreasing the set-point temperature (this may also be modified by the user, using the heating temperature adjustment knob, which, with the Auto function activated, is used to shift the curve in a parallel manner). Example 3: Single zone system (high-temperature) with REMOCON remote Control + outdoor sensor In this case the following parameters must be set: 4 21 - Activation of temperature adjustment using sensors - select 4 = outdoor sensor + room sensor 4 22 - Temperature adjustment curve selection - Select the relevant curve according to the type of system, installation, heat insulation used in the building, etc 4 23 - Perform a parallel curve shift if necessary, increasing or decreasing the set-point temperature. (This may also be changed by the user by the encoder which, with the Auto function activated, is used to shift the curve in a parallel manner.) 4 24 - Influence of room sensor - used to adjust the influence the room temperature has on the calculation of the set-point flow temperature (20 = maximum, 0 = minimum). Note: See page 39 for details on accessing menus. 37
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