Replacement Of Parts - Bosch Worcester 14/19CBI Installation And Servicing Instructions

15. Replacement Of Parts

Important: Turn off the gas and electricity supplies and drain,
where necessary, before replacing any components.
15.1 Always check for gas soundness where relevant and carry
out functional checks as described in Section 12 Commissioning.
Any O-ring, gasket or seal that appears damaged must be
replaced.
15.2 Component Access
Refer to Section 14.3 Inspection and Servicing for access to
components.
Fig. 33b. Inner Casing and control
14/19 and 19/24CBi
17
16
15
14
13
27
26
12
11
25
24
10
1. Inner case
2. J bolts and wing nuts (2)
3. Combustion chamber cover
4. Burner
5. Burner fixing screw
6. Control knob
7. Indicator lights
18
20
19
9
8. Base/controls fixing screw
9. Cabinet fixing screw
10. Gas valve
11. Spark electrode
12. Burner injector
13. Temperature sensor
14. Overheat thermostat
15.3 Draining the Appliance
Isolate the appliance.
Remove the casing. Refer to Section 14.3.
Fit a tube to the drain connection from the system (top connection
only) and open the tap. Refer to Fig 34. Close the tap when the flow
has stopped.
IMPORTANT: A small quantity of water will remain in some
components. Protect any electrical components when removing
items that might retain water.
15.4 Component Replacement
Replace any components removed from the appliance in the
reverse order using new gaskets/O-rings/sealant/heat transfer
paste where necessary. Always check that any electrical
connections are correctly made and that all screws are tight.
21
8
15. Air pressure switch
16. Flow pipe
17. Return pipe
18. Combustion test point
19. Sensing tubes
20. Fan
21. Fan clamp (2 screws)
26
22
23
1
2
3
4
5
6
7
22. Inner case cover fixing points (4)
23. Flue hood
24. Outer case earth tag
25. Side cover plate
26. Wire clip
27. Front baffle