Servicing and spares
Bosch Condens 5000W – 6 720 646 195 (2018/10)
48
Refer to figure 96.
1. Lift the heat exchanger up to clear.
2. Move the heat exchanger forward from the case.
Fig. 96 Heat exchanger removal
▶ Reassemble and check combustion as stated in section Setting the
air/gas ratio.
NOTICE:
CO/CO
2
checks
▶ If the joint between the air/gas manifold and heat exchanger is
disturbed the sealing gasket must be replaced.
After completing the service of the boiler, the CO/CO
2
must be
checked and set to the limits shown in Setting the air/gas ratio on
page 39.
6.8.11 Access to boiler control components
Refer to figure 97.
1. Remove three screws.
2. Remove cover from control.
Fig. 97 Removing the connection cover
6.8.12 PCB fuse
Refer to figure 98.
Replacing the 2.5A fuse (F1)
▶ Remove the fuse carrier [1], with fuse F1 from the fuse holder on the
PCB and replace a new fuse.
Replacing either the 1.5A (F2) or 0.5A fuse (F3)
▶ Remove fuse F2 [3] or F3 [2] from the fuse holder on the PCB and
replace a new fuse.
Fig. 98 Fuse locations
[1] F1 2.5A - T2.5H 250V
[2] F3 0.5A - T500L 250V
[3] F2 1.5A - T1.6L 250V
Spare fuses
Spare fuses are clipped into the underside of the electrical cover, refer to
figure 99.
Fig. 99 Spare fuses location
[1] T1.6L 250V
[2] T2.5H 250V
[3] T500L 250V
6720643895-115.1Wo
1.
2.
1.
1.
1.
2.
6720643895-40.1Wo
6720643895-74.1Wo
1
2
3
L
N
S
N
L
S LR
FSFR NP LP
B
B
4
2
1
A
F
7
8
9
Code Plug
Fan
Harness
S11
2.5 A 230 V AC
DV
Harness
S13
1.6 A
S12
0.5 A
ST10
ST8
ST6
ST19
Pump
Harness
Main
Harness
6720643895-75.1Wo
3
1
2
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