Baxi Combi Instant 80e Installation & Servicing Instructions Manual page 34

Pump Wiring
Cover
Socket Headed
Screw
Pump Setting
Fig. 55
Pump Wiring
Cover
34
Pump Body
Pump Head
Fig. 54
Automatic
Air Vent
Fig. 56
12.0 Changing Components
12.12 Pump - Head Only (Fig. 54)
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 15-50 head is suitable
for the Instant 80e. The Instant 105e requires a
15-60 head. 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.