Baxi 35/80 IE, Installation & Servicing Instructions Manual

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12.22 Central Heating Differential Valve Microswitch ( Fig. 64 )
1. Remove the two wires from the microswitch.
2. Undo the screw securing the microswitch to the valve body.
3. Reassemble in reverse order.
12.23 Pressure Relief Valve ( Fig. 65 )
Fig. 65
1. Drain the primary circuit.
2. Disconnect the discharge pipe from the valve. Using a suitable hexagon key undo the grub
screw sufficiently to release the valve.
3. Note the orientation of the valve, rotate it and withdraw it from the manifold.
4. Fit the new valve and 'O' ring seal and set to the previously noted orientation. Reassemble
in reverse order.
Page 38
13.0 Illustrated Wiring Diagram