Baxi Potterton 47-393-41, 47-393-40 Pump Head Only Fig, Pump Complete Fig, Automatic Air Vent Fig

Pump Wiring	Pump Body
Cover

Socket Headed

Screw

Pump Head

Fig. 87

Pump Setting

Fig. 88

Automatic Air

Vent

Pump Wiring

Cover

Fig. 89

14.0Changing Components

14.14Pump - Head Only (Fig. 87)

1.Drain the boiler primary circuit and remove the socket head screws securing the pump head to the body and draw the head away.

2.Undo the screw on the pump wiring cover and remove the cover. Using a suitable flat bladed screw driver press the cable securing levers downwards to release each wire after noting their position.

3.A standard replacement Grundfos 15-60 head can now be fitted. Connect the pump wiring to the new head. The pump speed must be set to 3 (Fig. 88).

4.Reassemble in reverse order.

14.15Pump - Complete (Fig. 88)

1.Drain the boiler primary circuit.

2.Undo the two screws securing the body to the pipe and manifold and draw the pump forwards.

3.Undo the screw on the pump wiring cover and remove the cover. Using a suitable flat bladed screw driver press the cable securing levers downwards to release each wire after noting their position.

4.Unscrew the automatic air vent from the pump body.

5.Connect the wiring to the new pump. Examine the ‘O’ ring seals on the return pipe and manifold, replacing if necessary.

6.Fit the air vent to the pump body and reassemble in reverse order.

14.16Automatic Air Vent (Fig. 89)

1.Drain the boiler primary circuit and unscrew the automatic air vent from the pump body.

2.Examine the ‘O’ ring seal, replacing if necessary, and fit it to the new automatic air vent.

3.Reassemble in reverse order.

46© Baxi Heating UK Ltd 2012