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Installation Instructions
Singular Combi Boiler - BTC 439003301 B (2021/07)
Table of Contents
1 Key to Symbols and Safety Instructions 4
1.1 Key to Symbols 4
1.2 Safety 4
2 General Information 7
2.1 Included Items 7
2.2 Optional Accessories 7
2.3 Specifi cations 8
2.4 Rating Plate 9
2.4 Dimensions 10
2.5 Components 11
3 Boiler Installation 13
3.1 Installer Qualifi cations 13
3.2 Compliance Requirements 13
3.3 Location 13
3.3.1 Access to Utilities 13
3.3.2 Humidity and Contact with Water 13
3.3.3 Drainage 13
3.3.4 Venting and Ventilation 13
3.3.5 Clearances 14
3.3.6 Clean, Debris and Chemical-Free Combustion Air 14
3.3.7 Position 14
3.4 Mounting to the Wall 15
4 System Piping 16
4.1 Installing a Space Heating System 16
4.1.1 Guidelines for a Space Heating System 16
4.1.2 Essential Elements in a Space Heating System 16
4.1.3 Space Heating Piping 17
4.2 Installing a Domestic Hot Water(DHW) System 17
4.2.1 Guidelines for a DHW System 17
4.2.2 Essential Elements in a DHW System 18
4.2.3 DHW System Piping 18
4.3 Connecting the Condensate Drain 19
4.3.1 Filling the Condensate Trap 20
4.4 System Filling 20
4.4.1 Built-In Water Filling 20
4.4.2 External Water Fill Connection 20
4.5 Test the Water System 21
4.5.1 External Water Fill Connection 21
4.6 Examples of System Applications 22
4.6.1 System Application – Zone System with Zone Valves 22
4.6.2 System Application – Single Zone System 23
4.6.3 System Application – Zone System with Circulators 24
5 Connecting the Gas Supply 25
5.1 Gas Pipe Sizing Tables 25
5.2 Gas Piping 26
5.3 Inlet Gas Pressure 27
6 Installing a Vent 29
6.1 Vent Type 29
6.1.1 Direct Venting 29
6.1.2 Non- Direct Venting 31
6.2 Vent Pipe Materials 33
6.3 Vent Length 34
6.4 Connecting the Vent Clip 34
6.5 Vent Termination 35
6.5.1 Single-Pipe Sidewall Venting 35
6.5.2 Two-Pipe Sidewall Venting 35
6.5.3 Snorkel Flue 36
6.5.4 Non-Concentric Sidewall Venting 36
6.5.5 Concentric Sidewall Venting 36
6.5.6 Two-Pipe Vertical Venting 37
6.5.7 Concentric Roof Venting 37
7 Setting the DIP Switches 38
8 Connecting the Power Supply 39
9 Installation Checklist 40
10 Operating the Boiler 42
10.1 Turning the Boiler On or Off 42
10.2 Checking the Ignition System 42
10.3 Setting the Space Heating Temperature 42
10.4 Setting the DHW (Domestic Hot Water) Temperature 43
10.5 Viewing Basic Information 43
10.5.1 H0 mode 44
10.5.2 H1 mode 44
10.5.3 H2 mode 44
10.5.4 H3 mode 44
10.5.5 H4 mode 45
10.5.6 H5 mode 45
10.5.7 H6 mode 45
10.5.8 H7 mode 45
10.5.9 H8 mode 46
10.5.10 H9 mode 46
10.5.11 HA mode 46
10.5.12 HB mode 46
10.5.13 Cd mode 47
10.6 Setting the Heat Load for The Outdoor Reset Control Mode 47
10.7 Altitude Adjustment 49
11 Gas Conversion 50
11.1 Combustion Analysis 52
12 Wiring Diagram 54
13 Ladder Diagram 55
14 Normal Operating Sequence 56
15 Outdoor Temperature Sensor 58
15.1 Outdoor Temperature Sensor Installation (Optional) 58
15.2 Outdoor Temperature Sensor Installation Guidelines 58
15.3 Outdoor Reset Control 59
16 Inspection and Maintenance 60
16.1 Draining the Boiler 60
16.2 Cleaning the Cold Water Inlet Filter 62
16.3 Cleaning the Air Intake Filter 62
16.4 Protecting the Boiler from Freezing 63
16.5 Maintenance Schedules 63
16.5.1 Owner Maintenance 63
16.5.2 Service Technician Maintenance 63
17 Troubleshooting 65
17.1 Basic Problems 65
17.2 Error Codes 66
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