HAMWORTHY HEATING LTD
9
PUREWELL
Vari
Heat c
500001169/T
Figure 4.4 – Water Connection Points
4.4 Water Supply
Feed and Expansion tanks to comply with static height requirements of BS6880 &
BS6644.
Cold feed and open vent pipes to comply with requirements of BS 6644.
Pressurised system to comply with BS 7074.
It is recommended that the system pipework is flushed twice before water
treatment.
In hard water areas (>180mg CaCO
3
/litre) precautions such as water treatment are
strongly recommended to prevent the build up of sludge and scale and also to
control the system water pH to between 7.0 & 8.0.
Leaks in the system pipe work should be fixed to prevent dilution of water
treatment.
Maximum working water pressure is 6 bar.
For minimum water pressure see Appendix ‘E’ - Water Data (Page 54)
Flow Connection
Return Connection
Model Type
PV70c, 95c & 110c
Model Type
PV140c & 180c
Summary of Contents for Purewell VariHeat 70c
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Page 43: ...HAMWORTHY HEATING LTD 37 PUREWELL VariHeat c 500001169 T Figure 8 3 11 Operating phases ...
Page 44: ...HAMWORTHY HEATING LTD 38 PUREWELL VariHeat c 500001169 T Figure 9 0 Boiler Wiring Schematic ...
Page 65: ...HAMWORTHY HEATING LTD 59 PUREWELL VariHeat c 500001169 T Figure E1 2 Typical Piping Layouts ...
Page 70: ...HAMWORTHY HEATING LTD 64 PUREWELL VariHeat c 500001169 T NOTES ...
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