Pump - Complete; Automatic Air Vent - Baxi 35/80 IE Installation & Servicing Instructions Manual

1. Drain the 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 Grundfos replacement head can now be fitted. A Grundfos 15-60 head is
suitable, connect the wiring to the new head. The pump speed must be set to 3 (Fig. 55).
4. Reassemble in reverse order.

12.13 Pump - Complete

(Fig. 56)
1. Drain the primary circuit and unscrew the automatic air vent from the pump body. Undo the
two screws securing the body to the pipe and manifold and draw the pump forwards.
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. Connect the wiring to the new pump. Examine the 'O' ring seals on the return pipe and
manifold, replacing if necessary.
4. Fit the air vent to the pump body and reassemble in reverse order.

12.14 Automatic Air Vent

(Fig. 56)
1. Drain the 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.
Page 35
12.15 Pressure Gauge (Figs. 57 & 58)