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TABLE OF CONTENTS
11.3 - Confi rming the boiler's gas type ........................................................................................................................................... 39
11.4 - Gas type conversion ............................................................................................................................................................. 39
11.5 - Start-up ................................................................................................................................................................................. 39
11.6 - Ignition control testing ........................................................................................................................................................... 40
11.7 - Gas supply pressure checking and adjustment .................................................................................................................... 40
11.8 - Check the combustion air pressure ..................................................................................................................................... 41
11.9 - Checking and adjusting CO2 levels ...................................................................................................................................... 42
11.10 - Adjusting the heating capacity ............................................................................................................................................ 43
11.11 - Domestic hot water fl ow rate adjustment ............................................................................................................................ 43
11.12 - Cold start boiler ................................................................................................................................................................... 43
12 - USE ............................................................................................................................................................................................... 44
12.1 - Check heating system pressure ........................................................................................................................................... 44
12.2 - Overview ............................................................................................................................................................................... 44
12.3 - Displays ................................................................................................................................................................................ 44
12.4 - Start-up procedure ................................................................................................................................................................ 45
12.5 - Summer mode ...................................................................................................................................................................... 45
12.6 - Winter mode ......................................................................................................................................................................... 45
12.7 - Adjusting the domestic hot water temperature .................................................................................................................... 46
12.8 - Heating system temperature adjustment .............................................................................................................................. 46
12.9 - Heating system type selection .............................................................................................................................................. 46
12.10 - Outdoor reset adjustment ................................................................................................................................................... 46
12.10.1 - Outdoor reset applications ................................................................................................................................... 46
12.10.2 - Outdoor reset adjustment precautions ................................................................................................................. 47
12.10.3 - Outdoor reset: setting parameters........................................................................................................................ 47
12.10.4 - Outdoor reset: zone adjustments ......................................................................................................................... 47
12.10.5 - Outdoor reset activation ....................................................................................................................................... 47
12.10.6 - Outdoor reset with room compensation............................................................................................................... 47
12.11 - Boiler switch settings .......................................................................................................................................................... 49
12.12 - Delays, alarms and protective actions ................................................................................................................................ 49
12.13 - Circulator pump and three way valve protection ................................................................................................................ 49
12.14 - Freeze protection ................................................................................................................................................................ 49
12.15 - Display in energy saving mode .......................................................................................................................................... 49
12.16 - "Users' menu" ..................................................................................................................................................................... 50
12.17 - "Installer's menu" ................................................................................................................................................................ 51
12.18 - Diagnostics ......................................................................................................................................................................... 53
12.18.1 - Diagnostics: "L" lock-outs ..................................................................................................................................... 54
12.18.2 - Diagnostics: "E" blocking errors ........................................................................................................................... 56
13 - MAINTENANCE ............................................................................................................................................................................ 58
13.1 - General precaution ............................................................................................................................................................... 58
13.2 - Removing the casing ............................................................................................................................................................. 58
13.3 - Cleaning the burner and primary heat exchanger, fl ue gas side ......................................................................................... 59
13.4 - Correct positioning of the ignition and fl ame detection electrodes ...................................................................................... 60
13.5 - Domestic hot water heat exchanger ..................................................................................................................................... 60
13.6 - Condensate trap cleaning ..................................................................................................................................................... 61
13.7 - Circulator pump motor replacement ..................................................................................................................................... 62
13.8 - Expansion tank pressure ...................................................................................................................................................... 62
13.9 - 3-way valve removal ............................................................................................................................................................. 63
13.10 - Draining the heating side of the boiler ................................................................................................................................ 64
13.11 - Draining the domestic hot water side of the boiler .............................................................................................................. 64
13.12 - Overrides ........................................................................................................................................................................... 64
13.12.1 - Auto-purging ......................................................................................................................................................... 64
13.12.2 - Fan ...................................................................................................................................................................... 64
13.12.3 - Minimum and maximum output ........................................................................................................................... 64
13.12.4 - Checking the fl ame current.................................................................................................................................. 64
13.13 - Water and fl ue temperature sensor .................................................................................................................................... 65
13.14 - Outdoor temperature sensor (optional) .............................................................................................................................. 65
13.15 - Functional wiring diagram ................................................................................................................................................... 66
13.16 - Multiwire wiring diagram ..................................................................................................................................................... 68
14 - TECHNICAL DATA ....................................................................................................................................................................... 70
15 - SPARE PARTS ............................................................................................................................................................................. 71
16 - READ OUT FLOW CHART .......................................................................................................................................................... 74
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