Air Pressure Switch; Spark Igniter; Flow/Casting Sensors; Overheat Sensor - Potterton Suprima 30 HE Installation & Service Instructions Manual

9.5 Air Pressure Switch

1. Perform General Access - See 9.2.
2. Disconnect the wires at the switch.
3. Note how they are fitted then disconnect the
sensing tubes at the switch.
4. Ease the front of the bracket forwards and
carefully prise the switch out of the bracket.
If the bracket is removed for any reason, note
that the hole in the side face locates around
a rivet head.
5. Re-assemble in reverse order, polarity is not
important when connecting the wires.
The coloured sensing tube fits to the
outer of the two connections.

9.6 Spark Igniter

1. Perform General Access - See 9.2.
2. Disconnect ignition lead at the ignition
electrode.
3. Loosen securing screws, slide unit back to
clear screws and lift away from the boiler.
4. Disconnect the electrical plug. Disconnect
ignition lead if required.
4. Re-assemble in reverse order.
9.7 Flow & Casting Sensors
1. Perform General Access - See 9.2.
2. Disconnect the electrical plug from the
sensor and unscrew the sensor from the
pocket.
3. Re-assemble in reverse order. Use a heat
sink compound on the sensor shaft, insert
and tighten to finger tight and a quarter turn.

9.8 Overheat Sensor

1. Perform General Access - See 9.2.
2. Disconnect the spade connectors from the
sensor and unscrew the sensor from the
pipe.
3. Re-assemble in reverse order, polarity is not
important when connecting the wires. Insert
and tighten to finger tight and a quarter
turn.
Suprima HE
Ease bracket open
Disconnect wires
Loosen screws
Ignition lead
Electrical plug
Overheat sensor
Disconnect tubes
Flow sensor
Casting sensor
intelligently applied technology
9.5
Fig. 34
9.6
Fig. 35
9.7
9.8
Fig. 36
35