41
13.0 Changing Components
© Baxi Heating UK Ltd 2016
Plate Heat
Exchanger
Rubber Seal
13.17
Plate Heat Exchanger (Fig. 62)
1. Close the flow & return isolation taps and the cold
mains inlet. Drain the primary circuit and draw off any
residual DHW.
2. Remove the gas valve as described in Section 13.20.
and disconnect the pressure gauge capillary.
3. Undo the screws securing the plate heat exchanger
to the hydraulic inlet & outlet assemblies
4. Withdraw the plate heat exchanger upwards and
remove.
Seals
5. There are four rubber seals between the hydraulic
assembly and heat exchanger which may need
replacement.
6. Ease the seals out of the hydraulic assembly. Replace
carefully, ensuring that the seal is inserted parallel and
pushed fully in.
7. When fitting the new heat exchanger note that the
right hand location stud is offset more towards the
centre.
8. Reassemble in reverse order.
13.18
Diverter Valve - Motor & Valve Assembly
(Fig. 63)
1. To replace the motor, disconnect the multi-pin plug.
2. Pull off the retaining clip and remove the motor.
3. The motor can now be replaced, or the valve
assembly removed.
4. Drain the primary circuit and draw off any hot water
once the isolating taps are closed. Disconnect the
pressure gauge capillary and h/exchanger flow pipe.
5. Undo the nuts on the tap rail under the boiler.
Remove the screws securing the valve assembly to the
boiler bottom panel and plate heat exchanger.
6. Remove the valve assembly. Examine all seals and
washers, replacing if necessary. Transfer the DHW
NTC and hydraulic pressure sensor to the new valve
and reassemble in reverse order.
Control Box removed
for clarity
Fig. 62
Diverter Valve
Motor
Multi-pin Plug
Retaining Clip
Valve
Assembly
Fig. 63
