Hamworthy Purewell VariHeat 65he Installation, Comissioning And Servicing Instructions page 25

Figure 7.4.3 - Fan Assembly PV65he & PV85he
High Fire Gas
Adjustment Factory
Sealed
Pressure Switch
Figure 7.4.4 - Fan Assembly PV105he & PV125he
HAMWORTHY HEATING LTD
Outlet Gas
Pressure
Test Point
Pressure Feed
Back Tube
Outlet Gas
Pressure
Test Point
PUREWELL VariHeat he
Pressure Switch
High Fire Gas
Adjustment Factory
Sealed
Low Fire Gas Adjustment
Factory Sealed
19
Low Fire Gas Adjustment
Factory Sealed
500001170/K