Flue Sensor; Igniter; Heating Flow & Return Sensors; Safety Thermostat - Baxi EcoBlue Plus Combi 28 Installation And Service Manual

Electrical
Plug
Fig. 54

Igniter

Mounting
Bracket
Connection ('B')
Spark
Connection ('A')
Safety
Thermostat
Fig. 55

DHW NTC Sensor

7219706 - 01 (04/15)

Flue Sensor

Control Box
removed for clarity
Earth
Heating Flow
Sensor
Retaining
Clip
Fig. 56
10.3.6 Flue Sensor
1. For ease of access remove the Expansion Vessel as
described in Section 10.3.23.
2. Ease the retaining tab on the sensor away and disconnect the
electrical plug.
3. Turn the sensor 90° anticlockwise to remove - it is a bayonet
connection.
4. Reassemble in reverse order.
10.3.7 Igniter (Fig. 54)
1. Note the position of the ignition & sensing leads and
disconnect them. Also disconnect the igniter feed plug.
2. Undo the screw securing the igniter mounting bracket to the
left hand side panel. Remove the igniter and bracket and
transfer the bracket to the new igniter.
3. Reassemble in reverse order, reconnecting the plug and
leads to the igniter.
10.3.8 Heating Flow & Return Sensors (Fig. 55)
1. There is one sensor on the flow (red wires) and one sensor
on the return (blue wires). Note: For access to the return sensor
first remove the fan and air/gas collector (see 10.3.2).
2. After noting the position prise the sensor clip off the pipe and
disconnect the plug.
3. Connect the plug to the new sensor and ease the clip onto
the pipe as close to the heat exchanger as possible.
10.3.9 Safety Thermostat (Fig. 55)
1. Pull the two spade connections off the safety thermostat.
2. Remove the screws securing the thermostat to the mounting
plate on the flow pipe.
3. Reassemble in reverse order, ensuring that the connections
are pushed fully on.
10.3.10 DHW NTC Sensor (Fig. 56)
1. Turn off the mains cold water supply tap and draw off the
residual domestic hot water.
2. Ease the retaining tab on the sensor away and disconnect the
electrical plug.
3. Remove the retaining clip and withdraw the sensor from the
hydraulic outlet assembly. Examine the 'O' ring, replacing if
necessary.
4. Reassemble in reverse order. The plug will only fit one way.
10
Maintenance
EcoBlue Plus Combi 57