7
Installation and Servicing
1 GENERAL ....................................................................8
1.1 Introduction ................................................................10
1.2 Operation ...................................................................10
1.3 Safe Handling .............................................................10
1.4 Optional Extra Kits .....................................................10
1.5 Safety ......................................................................... 11
1.6 Safe Handling of Substances ..................................... 11
1.7 Location of Boiler ...................................................... 11
1.8 Gas Supply .................................................................12
1.9 Flue Installation .......................................................... 12
1.10 Terminal ......................................................................13
1.11 Air Supply ...................................................................13
1.12 Water Circulation System ...........................................13
1.13 Boiler Control Interlocks ............................................. 13
1.14 Electrical Supply .........................................................13
1.15 Condensate Drain ....................................................13
1.16 Boiler Dimensions, Services & Clearances ................14
1.17 System Requirements ................................................15
1.18 System Balancing ......................................................16
1.19 Water Treatment.........................................................16
2 INSTALLATION .........................................................17
2.1 Boiler Assembly - Exploded View ...............................17
2.2 Unpacking ..................................................................18
2.3 Unpacking ..................................................................19
2.4 Front Panel Removal .................................................19
2.5 Wall Mounting Template .............................................20
2.6 Preparing the Wall ......................................................20
2.7 Fitting the Wall Mounting Plate...................................20
2.8 Mounting the Boiler ....................................................20
2.9 Determining Flue Length & Flue Packs Req’d .......... 21
2.10 Cutting & Setting the Flue Length .............................. 23
2.11 Installing the Flue ....................................................... 24
2.12 Fitting the Optional Roof Flue Kit (Flat Or Pitched) ....25
2.13 Flue Terminal Position ................................................26
2.14 Assembling the Roof Flue Kit .....................................27
2.15 Condensate Drain ......................................................28
2.16 Connections & Filling .................................................30
2.17 Electrical Connections ................................................31
2.18 Installer Wiring ...........................................................31
2.19 Replacing Pre-Fitted Mains Cable .............................33
2.20 External Electrical Controls ........................................ 33
2.21 Wiring Diagram ..........................................................34
2.22 Commissioning and Testing .......................................35
2.23 Initial Lighting .............................................................36
2.24 General Checks .........................................................37
2.25 Restart Procedure ...................................................... 37
2.26 Accessing the Installer Mode ..................................... 38
2.27 Handing Over ............................................................. 38
3 SERVICING ...............................................................39
3.1 Servicing Schedule ....................................................39
3.2 Boiler Front Panel Removal / Replacement ...............40
3.3 Fan And Venturi Assembly Removal and Cleaning ....40
3.4 Burner Removal and Cleaning ...................................41
3.5 Cleaning the Condensate Trap/Siphon .....................41
3.6 Cleaning the Heat Exchanger .................................... 42
3.7 Reassembly ...............................................................42
3.8 Replacement of Components .....................................43
3.9 Fan Replacement .......................................................43
3.10 Burner Injector Replacement .....................................44
3.11 Burner Replacement .................................................. 44
3.12 Return Thermistor Replacement ................................ 45
3.13 Ignition Electrode Replacement ................................. 45
3.14 Flame Detection Electrode Replacement ...................46
3.15 Spark Generator Replacement ..................................46
3.16 Gas Control Valve Replacement ................................ 47
3.17 Condensate Trap/Siphon Replacement ..................... 47
3.18 PCB Replacement ......................................................48
3.19 Draining the Boiler ......................................................48
3.20 Pressure Gauge Replacement ...................................49
3.21 Safety Relief Valve Replacement ...............................49
3.22 Pump Automatic Air Vent Replacement .....................50
3.23 Pump Head Replacement ..........................................50
3.24 Ch Water Pressure Switch Replacement ...................51
3.25 Control / No Flow Thermistor Replacement ............... 51
3.26 Heat Engine Replacement ......................................... 52
3.27 Expansion Vessel Recharging & Replacement ..........53
3.28 External System Filter Cleaning Guide.......................53
4 FAULT FINDING ........................................................ 54
4.1 Fault Finding Chart Main Menu ..................................54
4.2 ‘
L1’ - Flow Temp Ov’heat Lockout / No Water Flow Lockout ..
55
4.3 ‘L2’ - Ignition Lockout .................................................55
4.4 ‘L6’ - False Flame Lockout ........................................ 56
4.5 ‘Fd’ - No Water Flow ...................................................56
4.6 ‘F2’ Or ‘Fn’ Or ‘Ln’ - Flame Loss .................................56
4.7 ‘F3’ - Fan Fault ........................................................... 57
4.8 ‘F4’ - Control / No Flow Thermistor Fault ...................57
4.9 ‘F5 Or L5’ - Return Thermistor Fault ..........................57
4.10 ‘F6’ - Outside Sensor Fault.........................................57
4.11 No CH Operation ........................................................58
4.12 No HW ........................................................................58
4.13 No Display ..................................................................58
5 SPARE PARTS .......................................................... 59
6 BENCHMARK & COMMISSIONING .........................60
CONTENTS