Baxi Bahama 100 Installation And Servicing Instructions page 35

13.0 Changing Components – page 35
13.14 Thermistor
1. Remove the thermistor from the flow pipe.
2. Remove the electrical connections from the sensor.
3. Fit the new thermistor and reassemble in reverse order.
13.15 Safety Thermostat
1. Remove the retaining clip from the flow pipe.
2. Remove the electrical connections from the thermostat.
3. Remove the thermostat from the clip.
4. Fit the new thermostat and reassemble in reverse
order.
13.16 Expansion Vessel
1. Undo the expansion vessel connection and retain the
sealing washer.
2. Undo the expansion vessel clamping screws at either
side.
3. Remove the facia securing plate by removing the two
screws at either side.
4. Disconnect the spark electrode leads from the gas
valve plug and slide the expansion vessel forward,
ensuring the electrode leads and the wiring harness do
not foul on the expansion vessel.
5. Fit the new expansion vessel and reassemble in
reverse order.
13.17 Re-pressuring Expansion vessel
1. The charge pressure is 1.0 bar.
2. Close the central heating flow and return isolating
valves.
3. Drain down the boiler.
4. The "Schraeder" valve is positioned centrally at the
front of the appliance, directly below the airbox.
5. Pressurise to 1.0 bar.
6. Open the isolating valves and recharge the system to
1.0 bar.
7. Vent the system as necessary.