CONTENTS
Page 4
INTRODUCTION
Important note for Installers 3
Special Text Formats 3
Product codes and serial numbers covered 3
Servicing 3
Type of fuel 3
Operation on bio-fuel 3
CONTENTS 4
1 INTRODUCTION 6
1.1 Low nox technology 6
1.2 How a condensing boiler works 6
1.3 Boiler description 6
1.4 Boiler components 6
2 TECHNICAL DATA 8
2.0 Grant research and development combustion
at altitude 8
2.1 Burner power/altitude correspondence 8
2.2 Technical data boilers 8
2.3 Seasonal effi ciency, EPR, and NOX class 10
2.4 Smoke analysis (combustion gases) 10
2.5 Dimensions for Grant Vortex Boilerhouse
Combi boiler 11
3 Oil SUPPLY 12
3.1 Oil supply 12
3.1.1 Fuel storage and regulations 12
3.1.2 Fuel pipes 12
3.1.3 Single pipe system 13
3.1.4 Two pipe system 13
3.2 Connecting oil supply to the burner in single tube
or in twin-tube. 14
3.3 Main components of the burner 15
4 INSTALLATION 16
4.1 Inroduction 16
4.2 Location of boiler 16
4.3 Compliance with regulations 16
4.4 Heating system design considerations 16
4.5 Pipework materials 17
4.6 Connections 17
4.7 Preparation for installation 17
4.8 Installing the boiler 17
4.9 Filling the heating system 17
4.10 Before commissioning 18
4.11 End of the works 18
4.12 Heating circuits with underfl oor heating 18
4.13 Underfl oor piping 18
5 PIPE CONNECTIONS 19
6 CONDENSATE DISPOSAL 20
6.1 General requirements 20
6.2 Connections 20
6.3 Pipework 20
6.4 External pipework 20
6.5 Condensate soakaway 21
6.6 Condenstate trap 21
6.7 Disposal of condensate 21
6.8 Inspection and cleaning of trap 21
6.9 External condensate 22
7 SEALED SYSTEM 23
7.1 Sealed system requirements 24
7.1.2 Pressure gauge 24
7.1.3 Pressure relief (Safety valve) 24
7.1.4 Filling / Disconnector 24
7.1.5 Heating system 25
7.2 Filling the installation with closed expansion
vessel 25
7.3 Purge of the pump (on heating pump,
or primary pumor DHW pump) 25
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