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6.9.5
Diverter valve motor
▶ Ensure that the appliance is in service mode (there is no need to drain
the appliance).
▶ Disconnect the connector [2] from diverter valve motor [1].
▶ Pull the motor [1] to you, the assembly will slide free from the valve.
▶ To refit, follow the reverse of above.
In case of problems when refitting the motor: connect
the electrical connector to the motor and switch the
appliance on. When the motor goes into the middle
position the motor can be fitted without difficulty.
6.9.6
Diverter valve
▶ Ensure that the appliance has been fully drained.
▶ Disconnect the connector [2] from diverter valve motor [1].
▶ Undo the two screws holding the valve actuator body [4] to the
plastic housing [3].
▶ Remove the motor and valve actuator body from the diverter valve.
▶ Withdraw the valve actuator from the diverter valve.
▶ To refit assemble in reverse, ensuring that the valve actuator is
properly seated on the two lugs of the actuator body.
3
1
2
Fig. 62 Diverter valve assembly
6.9.7
Pump removal
▶ Refer to figure 63
▶ Isolate the appliance from the power supply.
▶ Turn off all the isolation valves
▶ Drain the appliance, refer to section 6.9.1.
▶ Disconnect the pump control plug [1] and power plug [2]
▶ Pull out the retaining clip [3] securing pipe {4}
▶ Release the pipe from the HE [4] and swing away from the pump.
▶ Release the nut [5], lift the pump slightly to clear the pump support
▶ Pull the pump away from the pipe to the diverter valve and remove.
▶ Re-assembly is a reverse of this procedure
Pump head removal
Alternatively, after isolating and draining the appliance:
▶ Disconnect electrical plugs [1] and [2]
▶ Remove the four Allen screws [6] and pull the pump head off.
▶ Re-assembly is a reverse of this procedure
6720818077 (2016/04) -
Greenstar Highflow CDi
4
6720818077-19.1Wo
ErP
1
2
6
Fig. 63 Pump and pump head removal
6.9.8
Sample points
Air sampling point [1]
See section 6.5 on page 33, Checking flue integrity
Flue Gas sampling point [2]
See section 6.6 on page 33, Flue gas analysis
6.9.9
Sensors
▶ Check that the appliance is electrically isolated.
Central heating flow temperature sensor [3]:
▶ Remove the connector.
▶ Release the sensor clip and withdraw the sensor.
▶ Apply heat transfer paste to the replacement sensor.
Tank overheat thermostat [4]:
▶ Remove the screws retaining plastic cover.
▶ Remove the cover and disconnect 2 electrical connections.
▶ Unscrew the two hexagon studs.
▶ Replace the sensor, coating surface with paste supplied.
▶ Re-assemble.
Tank sensor [5]:
▶ Remove the screws retaining plastic cover.
▶ Remove the cover and disconnect the two electrical connections.
▶ Unscrew 2 hexagon studs.
▶ Replace the sensor, coating surface with paste supplied.
▶ Re-assemble.
Flow sensor/flow regulator assembly [6]:
▶ Shut off the mains water at inlet valve and drain DHW circuit.
▶ Disconnect the in-line connector.
▶ Remove the two retaining clips [7].
▶ Remove the flow sensor assembly [6].
▶ Remove the brass housing with flow regulator [8] from sensor.
▶ Re-assemble ensuring that retaining clips are correctly positioned.
SERVICING AND SPARES
4
3
1
2
5
39
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