10.0 Changing Components
22
10.7
Flue Safety Thermostat
1. Undo the nut securing the Flue Safety
Thermostat to the draught diverter. Ease the
cable clamp from the slot in the draught diverter
(Figs. 47 & 48).
2. Undo the screw retaining the earth wire to the
boiler and disconnect the plug on the Flue
Safety Thermostat cable from the boiler harness
(Fig. 49).
3. Reassemble in reverse order. Check the
operation of the Safety Thermostat by capping
the flue. The boiler should extinguish within
three minutes.
10.8
Burner Ignition Control
(Fig. 50)
1. Remove the screw securing the burner
ignition control to the gas valve. Draw the
control off the valve.
2. Pull the electrode leads off the burner ignition
control.
3. Prise apart the three barbs securing the
control cover. Remove the cover.
4. Undo the screws securing the cable clamp to
the control and disconnect the edge connector
from the control P.C.B.
5. Fit the new burner ignition control and
reassemble in reverse order.
Flue Safety
Thermostat
Fig. 47
Flue Safety
Thermostat
Earth Retaining
Screw
Spark Electrode
Cable Clamp
Edge Connector
Sensing Electrode
Burner Ignition Control
Draught Diverter
Securing Nut
Cable Clamp
Fig. 48
Fig. 49
Fig. 50
