35
221873B
Diagram 14.11
7815
LOW WATER
PRESSURE
SWITCH
RETAINING
CLIP
Remove the clip to remove the water pressure switch, see
diagram 14.11.
Remove the plastic cover.
Remove the electrical connectors.
Refer to wiring diagram 14.29 when fitting.
14.12 Safety Valve
Before starting refer to Section 11.
Remove the two screws securing the controls cover door and
controls fascia, see diagram 9.1.
Hinge the assembly open.
Remove the case base, see diagram 10.3.
Release the water pressure and drain the central heating circuit
of the boiler, refer to Section 11.3 and 11.6.
Disconnect the union nut and clip to release the safety valve,
see diagram 14.5.
14.13 Diverter Switch
Before starting refer to Section 11.
Isolate the boiler from the electrical supply.
Remove outer case front as section 11.4.
Remove the two screws securing the controls cover door and
controls fascia, see diagram 9.1.
Hinge the assembly open.
Remove the electrical plug, the retaining clip ease the switch
from the diverter valve, see diagram 14.12.
14.14 Diverter Valve
Before starting refer to Section 11.
Remove the diverter switch as section 14.13.
Remove the diverter valve securing pin, ease the diverter valve
from its housing, see diagram 14.13.
14.15 Thermistor - Domestic Hot Water.
Before starting refer to Section 11.
Drain domestic hot water.
Remove outer case front as section 11.4.
Remove the two screws securing the controls cover door and
controls fascia, see diagram 9.1.
Hinge the assembly open.
Remove the electrical connection, securing pin, ease the
thermistor from its housing, see diagram 14.14.
14.16 Thermistor - Central Heating.
Before starting refer to Section 11.
Remove outer case front as section 11.4.
Remove the two screws securing the controls cover door and
controls facia, see diagram 9.1.
Hinge the assembly forward.
Disconnect the electrical connections, unclip to remove
thermistor, see diagram 14.4.
14 Replacement of Parts
LEFT HAND
HYDRO BLOCK
14.17 Flow Regulator / Filter
Before starting refer to Section 11.
Drain domestic hot water.
Remove outer case front as section 11.4.
Remove the two screws securing the controls cover door and
controls fascia, see diagram 9.1.
Hinge the assembly open.
Release the water pressure and drain the domestic hot water
circuit of the boiler, refer to Section 11.3 and 11.6.
Remove the flow regulator/filter, see diagram 14.15.
14.18 Pressure Differential Micro Switch
Before starting refer to Section 11.
Drain central heating water.
Remove outer case front as section 11.4.
Remove the two screws securing the controls cover door and
controls facia, see diagram 9.1.
Hinge the assembly open.
Disconnect the inline connector to the pressure differential
micro switch.
Remove the micro switch securing clip, ease the micro switch
from its housing, see diagram 14.16.
14.19 Domestic Hot Water Micro Switch
Before starting refer to Section 11.
Drain domestic hot water.
Remove outer case front as section 11.4.
Remove the two screws securing the controls cover door and
controls fascia, see diagram 9.1.
Hinge the assembly open.
Disconnect the inline connector to the hot water micro switch.
Remove the micro switch securing clip, ease the micro switch
from its housing, see diagram 14.17.
RETAINING
CLIP
PLASTIC COVER
