Installation Manual - Unical Lattner Condensing Hot Water Boilers

Instructions for the installer3.28 - BURNER ADJUSTMENTWARNING!All the instructions indicated below are for theexclusive use of qualified LATTNER servicetechnicians or installers.All the boilers are supplied already calibratedand tested. If it is necessary to change thecalibration due to gas conversion or adaptationto the mains supply system, the gas valve mustbe re-calibrated.A) Max output adjustment- Connect a suitable C0 2gas analyser to the samplingpoint in the flue inlet/outlet terminal.MAXIMUM OUTPUTADJUSTMENT SCREW (A)B) Min output adjustment- By pressing the key “- decrease” again the boiler willoperate at the minimum output (led 1 blinking).1VIOLETLIGHTBLUE- Pressing simultaneously the keys + (plus) and –(minus) for at least 3 seconds the boiler will operatein the CH mode at the maximum output (led 1illuminated).- Check that the C0 2values are within the valuesindicated in the table “Burner pressures”- If necessary correct the value by turning the adjustmentscrew “A” in a CLOCKWISE direction to decrease thevalue and in an ANTICLOCKWISE direction in order toincrease it.1YELLOWVIOLETBLUE-To disenable the CHIMNEY SWEEPER MODEpress the keys + (increase) and – (decrease)simultaneously (led 1 off).1LIGHTBLUEVIOLETLIGHTBLUEYELLOWBLUEYELLOWBLUE- Check that the C0 2values are within the values indicatedin the table “Burner pressures”39