Hamworthy Purewell VariHeat he Installation, Commisioning And Maintenance Instructions page 5

FIGURES
Figure A1 Gas Data .................................................................................................................................40
Figure B1.1 Electrical Supply......................................................................................................................41
Figure B1.2 External Control Wiring for Multiple Boiler Installation............................................................42
Figure C1 Flue Data.................................................................................................................................43
Figure C1.1 Flue Resistance ......................................................................................................................45
Figure C1.2 Open Flue (Natural Draught) B23 Flue System......................................................................45
Figure D1 Mechanical Ventilation Flow Rates .........................................................................................47
Figure E1 Water Data ..............................................................................................................................48
Figure E1.1 Cold Feed and Vent Pipe Sizes ..............................................................................................48
Figure E1.2 Typical Piping Layouts ............................................................................................................49
Figure E1.3.1 Schematic for Single Boiler System........................................................................................51
Figure E1.3.2 Schematic for Single Boiler, Primary Circuit System ..............................................................51
Figure E1.3.3 Schematic for Multiple Boiler (0~10V) Primary Circuit System...............................................52
Figure E1.3.4 Schematic for Multiple Boiler (Cascade) Primary Circuit System...........................................52
HAMWORTHY HEATING LTD
Page 4 iv
PUREWELL VariHeat he
PAGE
500001155/F