Baxi Bahama 100 Installation And Servicing Instructions page 36

13.0 Changing Components – page 36
13.18 Pressure Relief Valve (Fig. 62)
1. The pressure relief valve is positioned on the central
heating bypass pipe at the diverter valve manifold.
2. Drain the system at an appropriate low point.
3. Disconnect the union between the valve and the
discharge pipe.
4. Slacken the grub screw retaining the valve.
5. Pull the valve sideways to disengage it.
6. Fit the new pressure relief valve and reassemble in
reverse order.
13.19 Flow Switches (Fig. 63)
1. The procedure for changing both flow switches is not
the same. However they are interchangeable.
2. Remove the electrical connections.
3. To access the central heating flow switch (left hand)
remove the diverter valve/plate heat exchanger pipe by
loosening the screw at the plate heat exchanger
housing and remove the retaining clip at the diverter
valve, then lift away.
4. Unscrew the switch cap assemblies and remove. The
caps are hand tight, so no tool is necessary. The
central heating flow switch includes a return spring.
This must be retained.
5. Remove the flow switch bobbin from the housing. The
bobbin contains a magnet and can be removed by
using a screwdriver to carefully lift it out.
NOTE: The flow switch components are matched sets
and must not be interchanged separately.
6. Fit the new flow switches and reassemble in reverse
order. The spring must always be refitted to the central
heating flow switch (Fig. 63a).
13.20 Pressure Gauge
1. Undo the nut retaining the capillary in the connection at
the flow pipe (Fig. 64).
2. Depress the two lugs on either side of the pressure
gauge and feed through facia (Fig. 65).
3. Fit new pressure gauge and reassemble in reverse
order.