Ch Pressure Relief Valve; Dhw Pressure Relief Valve; Dhw Plate Heat Exchanger; Bypass Valve - Worcester GREENSTAR 24i Junior Installation, Commissioning And Servicing Instructions

SERVICE AND SPARES

6.8.27 CH PRESSURE RELIEF VALVE

▶ Remove the hydraulic block from the boiler (See 6.8.26 Removing
the Hydraulic Block).
1. Release the spring clip from the Pressure Relief Valve housing.
2. Withdraw the Pressure Release Valve from its housing.
2.
Fig. 130 PRV removal
▶ To refit, follow the above in reverse. Ensure any seals that have been
disturbed are renewed.

6.8.28 DHW PRESSURE RELIEF VALVE

NOTICE: DEVICE REMOVAL
▶ If the hydraulic block has already been removed from
the appliance, steps 3 and 4 are all that is required to
remove the DHW pressure relief valve.
▶ Ensure the system is fully drained.
▶ Disconnect all pipes connected to the pump housing.Remove the
electrical connection to the pump.
1. Remove the metal clip to the right of the pump head to release the
pump housing.
2. Slide the pump housing to the left and withdraw from the appliance.
3. Remove the spring clip from the pressure relief valve housing.
4. Withdraw the pressure relief valve.
4.
2.
Fig. 131 DHW pressure relief valve
▶ To refit, follow the above in reverse. Ensure any seals that have been
disturbed are renewed.
50

6.8.29 DHW PLATE HEAT EXCHANGER

1. Undo the two screws securing the plastic housing to the heat
exchanger.
2. Remove the heat exchanger
1.
Fig. 132 DHW heat exchanger
▶ To refit, follow the above in reverse.
▶ Ensure any seals that have been disturbed are renewed.

6.8.30 BYPASS VALVE

1. Remove the two spring clips at either end of the copper bypass pipe.
3.
Fig. 133 Removing the bypass valve
1.
▶ Undo the screw securing the left hand plastic housing to the heat
exchanger.
▶ Move the housing to the left to free up the one end of the pipe.
▶ Remove the pipe from the right hand housing to reveal the bypass
6720643895-95.1Wo
valve.
2. Using a pair of pliers, pull out the bypass valve from the housing
▶ To refit, follow the above in reverse. Ensure any seals are renewed.
Remove the Hydraulic block from the boiler (See 6.8.26
removing the Hydraulic Block).
2.
1.
1.
1.
6720643895-96.1Wo
2.
6720643895-97.1Wo
6 720 802 047 (2013/05)