Air Pressure Switch; Fan; Fan Seals; Temperature Sensor D.h.w And C.h - Potterton Combi 80 Installation & Service Instructions Manual

Replacement of Parts - Page 31
5.14

Air Pressure Switch

1. Remove the white front case, base panel and white right
hand side panel. See 4.1, 4.2 & 4.3 in 'Routine
Maintenance'.
2. From the top right hand side of the boiler undo the
securing screw retaining the pressure switch /bracket
assembly
3. Lift the pressure switch / bracket assembly clear of the
top of the boiler. Note positions and disconnect pressure
tubes and electrical connectors.
4. Replace pressure switch and re-assemble in reverse
order.
Note: The Red pressure tube must be connected to the High
side of the switch, indicated by (H) and a Red Paint Spot.
The electrical connections must be as follows.-
Orange Common
Violet Normally Closed
Grey Normally Open
- Fig. 11 & 20
(C)
(NC)
(NO)
5.15

Fan

1. Remove the fan. See 4.1, 4.2 & 4.3in 'Routine
Maintenance'.
2. Transfer the fan outlet seal to the new fan and fit the fan
into the appliance. Ensure a good seal is made between
the fan inlet and the fluehood.
3. Re-assemble in reverse order. Ensure the seal is not
trapped on the turned down edge.
5.16

Fan Seals

1. Remove the fan. See 4.1, 4.2, 4.3 & 4.4 in 'Routine
Maintenance'.
2. Remove the fan outlet seal by sliding the seal off the
fan. Remove the fan inlet seal by pulling the seal away
from the fluehood and disconnecting the pop in locaters.
3. Fix the new seals in position.
4. Re-assemble in reverse order. Ensure the seal is not
trapped on the turned down edge.
5.17 Temperature Sensor D.H.W. & C.H. - Fig. 11
1. Remove the white front case and base panel.
See 4.1 & 4.2 in 'Routine Maintenance'.
2. For D.H.W sensor lower the control panel assembly by
undoing the securing screw at the top right hand side of
the control panel.
3. Before removing the hot water or central heating sensor,
first close the isolating valves for the circuit involved and
drain the appliance as described on Page 26.
4. Disconnect the electrical connection from the sensor(s)
and unscrew from its housing.
5. Refit the new sensor(s) and 'O' Ring seal if required. Re-
assemble in reverse order. If necessary (C.H. sensor
only) re-charge the central heating system as described
in Section 1.8 and check for leaks.
5.18

Pressure Gauge

1. Remove the white front case and base panel.
See 4.1 & 4.2 in 'Routine Maintenance'.
2. Drain the central heating circuit as described on Page
26.
3. Use a spanner to prevent the pressure gauge from
rotating and undo the 1/4" BSP nut behind the pressure
gauge and remove the gauge.
4. Fit the new pressure gauge and sealing washer. Re-
assemble other parts in reverse order. Re-charge the
central heating system as described in Section 1.8 and
check for leaks.
- Fig. 11