Potterton HE Plus Installation & Service Instructions Manual page 40

Electrical
Plug
Fig. 74
Flow Pipe
Fig. 75
Pressure Sensor
Fig. 76
40
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Supplied By www.heating spares.co Tel. 0161 620 6677
Flue/Heat Exchanger
Thermostat Sensor
Central Heating
Temperature Sensor
Safety Thermostat
Return Heating
Temperature Sensor
14.0 Changing Components
14.8
1. Ease the retaining tab on the sensor away and disconnect
the electrical plug.
2. Turn the sensor 90
bayonet connection.
3. Reassemble in reverse order.
14.9
1. Drain the primary circuit.
2. Disconnect the two wires from the sensor.
3. Undo the nut on the flow pipe securing and sealing the
sensor.
4. Remove the sensor, examine the sealing washer, replacing if
necessary.
5. Reassemble in reverse order. The component is not
polarised - either wire will fit each terminal.
14.10
1. Ease the retaining tab on the sensor away and disconnect
the electrical plug.
2. Unscrew the sensor from it's pocket and reassemble in
reverse order. The plug will only fit one way.
14.11
1. Pull the plug off the thermostat.
2. Remove the screws securing the thermostat to the
mounting plate on the flow pipe.
3. Reassemble in reverse order, ensuring that the plug is
pushed fully on.
14.12
1. Ease the retaining tab on the sensor away and disconnect
the electrical plug.
2. Prise the sensor retaining clip off the pipe and remove the
sensor from the clip.
3. Reassemble in reverse order.
Fig. 77
Flue/Heat Exchanger Thermostat Sensor
(Fig. 74)
o anticlockwise to remove - it is a
Water Pressure Sensor (Fig. 76)
Central Heating Temperature Sensor (NTC)
(Fig. 75)
Safety Thermostat (Fig. 75)
Return Heating Temperature Sensor
(Fig. 77)