SERVICING AND SPARES
6 720 815 725 (2015/05)
52
29. DHW HEAT EXCHANGER
▶ Remove the Hydraulic block from the boiler (See Removing the
Hydraulic Block).
▶ Undo the two screws (B) securing the plastic housings to the heat
exchanger.
▶ Remove the heat exchanger.
▶ To refit, follow the above in reverse.
▶ Ensure any seals that have been disturbed are renewed.
Fig. 100 DHW Heat Exchanger removal
6.4
SHORT PARTS LIST
B
6 720 812 176-19.1O
Fan
8 716 116 067 0
GC No.
H26 536
Burner
8 718 006 658 0
GC No.
E27 200
Burner skin seal
8 711 004 168 0
0GC No.
E27 201
Gas valve
8 718 221 347 0
GC No.
H56-469
Temperature limit
sensor
8 722 963 858 0
GC No.
H08 291
Electrodes
8 716 771 932 0
GC No.
H22 458
Flow reg. Type E
11 litre - brown8 716
107 044 0
Flow reg. Type E
12 litre - red8 716 141
061 0
Flow reg. Type E
14 litre - pink8 716
107 887 0
Flow reg. Type E
15litre - lime green
8 716 141 031 0
GC No.
H31 959
Pump assembly
8 718 221 728 0
GC No.
H22 463
Pressure gauge8 718
224 344 0
GC No.
H02 528
Flow sensor
8 716 115 754 0
GC No.
H02 529
DHW temperature
sensor
8 714 500 081 0
GC No.
H02 538
Heat exchanger
16 plate
8 716 106 685 0
GC No.
H02 531
Heat exchanger
20 plate
8 716 108 212 0
GC No.
H22 465
Control unit
8 737 703 196 0
Bearing plate
(Fan intake
diaphragm)
8 715 505 883 0
Table 14 Short parts list
3
1
3
