Warning
Ensure that both flue test point plugs are in place after checking
combustion.
9.3.13 Pump - head only
To remove the pump head only.
1. Drain the boiler primary circuit and disconnect the electrical plug
from the pump
2. Remove the socket head screws securing the pump head to the
body and draw the head away.
3. Fit the new pump head and reassemble in reverse order.
9.3.14 Pump - complete
Warning
Take precautions to protect other components from water damage
when removing the pump and auto air vent.
1. Hinge the control box down.
2. Close the flow and return isolation taps and drain the boiler primary
circuit.
3. Disconnect the electrical plugs from the pump motor.
4. Prise off the securing clip that is holding the pump return pipe in po
sition. Pull away the pipe.
5. Pull out the securing clip that is holding the pump body to the hy
draulic inlet assembly.
6. Prise off the securing clip and disconnect the braided hose from the
pump body, taking care as water may still be in the hose.
7. Remove the screws securing the pump to the boiler bottom panel.
8. The pump should now be able to be remove.
9. Pull out the securing clip and remove the automatic air vent, trans
fering it to the new pump body.
10. Examine all ‘O’ ring seals, replace if necessary and reassemble in
reverse order.
Fig.66
Remove pump head only
PN-0000380
Fig.67
Remove pump
PN-0000379
9 Maintenance
63
