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7.5 Instructions for the use of Bio Fuel ........................................................................................... 57
8 FLUES ................................................................................................................................. 59
8.1 Flue Options, Components & Dimensions ................................................................................ 59
8.1.1 Conventional Flue Guidelines ......................................................................................................... 59
8.1.2 Condensing Boiler Flue Kits ............................................................................................................ 60
8.1.3 HE Low Level Balanced Flue Kit (FBF) ........................................................................................... 61
8.1.4 HE High Level Balanced Flue Kit (HBF).......................................................................................... 63
8.1.5 HE Vertical Balanced Flue Kit (VBF) ............................................................................................... 65
8.1.6 Warmflow HE Boiler Flue Components: 80/125 Ø ......................................................................... 67
8.1.7 Flue Length Calculation ................................................................................................................... 68
8.1.8 Plume Management Kits .................................................................................................................. 69
8.1.9 Utility Plume Management Kit (UPMK) ........................................................................................... 69
8.1.10 Kabin Pak Plume Management Kit (KPMK) .................................................................................... 71
8.1.11 Flexible Flue Liner Kit (HFL & VFL) ................................................................................................. 73
8.2 Flue Terminal Locations ........................................................................................................... 75
9 AIR SUPPLY FOR COMBUSTION & VENTILATION ......................................................... 76
9.1 Open Flue Boilers..................................................................................................................... 76
9.2 Balanced Flue Boilers – Boilers in a Compartment ................................................................... 76
10 INSTALLATION REQUIREMENTS ................................................................................. 77
10.1 General Requirements ............................................................................................................. 77
10.1.1 Hearth ................................................................................................................................................. 77
10.1.2 Service Access .................................................................................................................................. 77
10.1.3 Heating System ................................................................................................................................. 77
10.1.4 Air Vents ............................................................................................................................................ 77
10.1.5 Drain Cock ......................................................................................................................................... 77
10.1.6 Frost Protection ................................................................................................................................ 78
10.1.7 Pipework ............................................................................................................................................ 78
10.2 Sealed Systems ....................................................................................................................... 78
10.2.1 Expansion Vessel ............................................................................................................................. 78
10.2.2 System Filling .................................................................................................................................... 79
10.2.3 Combi Filling ..................................................................................................................................... 79
10.2.4 System Pressure ............................................................................................................................... 79
10.2.5 Pressure Relief Valve ....................................................................................................................... 79
10.2.6 Low Pressure Switch ........................................................................................................................ 79
10.3 Combi Domestic Hot Water ...................................................................................................... 79
10.3.1 Mains Water Pressure ...................................................................................................................... 79
10.3.2 Water Hardness ................................................................................................................................. 80
10.3.3 Boreholes .......................................................................................................................................... 80
10.3.4 Flow Restrictor .................................................................................................................................. 80
10.3.5 Pipework ............................................................................................................................................ 81
10.3.6 Tank thermostat ................................................................................................................................ 81
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