Syphon Removal; Access To Boiler Control Components; Pcb Fuse; Code Plug - Bosch WORCESTER GREENSTAR Ri ErP Series Installation, Commissioning And Servicing Instructions

Fig. 88 Heat exchanger removal
▶ Reassemble and check combustion as stated in the air/gas ratio
section. 7.6.
NOTICE: CO/CO CHECKS
2
▶ If the joint between the Air/Gas manifold and heat
exchanger is disturbed sealing gasket must be
replaced.
▶ After completing the service of the appliance, the CO/
CO must be checked and set to the limits shown in
2
"Setting the air/gas ratio" in section 7.6.

7.8.13 SYPHON REMOVAL

To release the syphon from the sump:
1. Undo the plastic nut on the bottom of the syphon and move the
condensate pipe away from the syphon.
2. Remove the two screws retaining the syphon bracket.
3. Remove the bracket.
4. Remove the screw and release the syphon retaining clamp
5. Swing the clamp completely to the left away from the syphon
6. Pull the syphon towards you and remove from the sump connection.
5.
6.
Fig. 89 Syphon removal

7.8.14 ACCESS TO BOILER CONTROL COMPONENTS

1. Remove three screws.
2. Remove cover from control.
Greenstar Ri ErP - 6 720 813 283 (2016/07)
2.
1.
4.
2.
3.
1.
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7.8.15 PCB FUSE

▶ Remove fuse holder with fuse F1 (1) from the control and replace with
a new fuse.
A spare 2A fuse for F1 clipped onto the inside of the
cover.
2.
1.
1
Fig. 90 Removing the connection cover

7.8.16 CODE PLUG

Refer to figure 90 for code plug replacement:
▶ Gently pull the code plug from the socket (2).
▶ The code plug should be left attached to the frame of the boiler by its
plastic safety thread.

7.8.17 TRANSFORMER/PCB

To change either the PCB, F2 fuse or transformer:
▶ Remove two screws securing the control.
▶ Pull the control forward.
▶ Lower the control to align the slots at the top of the control with the
lugs on the boiler framework.
▶ Hang control on two lugs on boiler framework.
1. Unscrew the three screws in the control panel.
2. Remove the connections cover and disconnect all electrical
connections from the control.
3. Remove the control from the boiler.
4. Remove the four screws retaining the rear panel of the control.
5. Remove the rear panel.
6. Remove the transformer cover.
7. Remove the printed circuit board.
SERVICE AND SPARES
2
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