Baxi Bahama 100 Installation And Servicing Instructions page 33

13.0 Changing Components – page 33
To change the gas valve - spark generator -pump (head
only) - pump - thermistor & safety thermostat -
expansion vessel - pressure relief valve - flow switches -
pressure gauge -diverter valve - domestic hot water filter
& flow regulator cartridge - central heating return filter -
domestic hot water heat exchanger - CVI ignition
cartridge - ECS hydraulic control board - Release the two
facia securing screws (¼ turn) and hinge down the box.
13.9 Gas Valve (Figs. 54 & 55)
1. Isolate the gas and electrical supplies to the appliance.
2. Disconnect the 12 way electrical block to the CVI unit.
3. Undo the screw securing the CVI unit to the gas valve.
Pull the unit off the valve.
4. Disconnect the ignition and sensing leads from the CVI
unit and carefully put the unit to one side.
5. Undo the nut on the gas feed pipe at the tap rail.
Remove the spring clip from the burner feed pipe and
undo the screws securing the valve mounting bracket to
the chassis.
6. Draw the valve forwards taking care not to lose the
sealing washer and 'O' ring.
7. Remove the screws securing the gas feed pipe and
burner feed pipe to the gas valve. Examine the 'O' rings
- if they are damaged in any way they must be
replaced.
8. Remove the mounting bracket and fit it to the new
valve. Fit the gas feed pipe and burner feed pipe to the
new valve, ensuring that the 'O' rings are in place.
9. Reassemble in reverse order, taking care when fitting
the CVI unit. Recommission the appliance.
13.10 CVI Unit
1. Isolate the gas and electrical supplies to the appliance.
2. Disconnect the 12 way electrical block to the CVI unit.
3. Undo the screw securing the CVI unit to the gas valve.
Pull the unit off the valve.
4. Disconnect the ignition and sensing leads from the CVI
unit.
5. Reassemble in reverse order, taking care when fitting
the CVI unit to the valve. Recommission the appliance.