Bosch ZSB18 - 2A Installation And Servicing Instructions page 9

AU/NZ
1 Expansion vessel
2 Sensor - boiler flow
3 Removable panel - for servicing
4 Electrode assembly
5 Overheat thermostat
6 Securing nut - air/gas manifold clamp
7 Silicon tube - heat exchanger air vent
8 Heat exchanger
9 Flue over heat thermostat
10 Access panel - heat exchanger/sump cleaning
11 Right side hand-hold for lifting boiler
12 Diverter valve assembly (body)
13 Diverter valve actuator (stepper motor)
14 Pump
15 Drain point
16 CH return isolator
17 System pressure gauge
18 Control panel (in service position)
19 Cover - external wiring connections
20 Cover - transformer and PCB
21 Gas inlet connection BSP ¾ inch thread
22 CH flow isolator
Tab. 6 Boiler components
32
44
43
Fig. 3 Hydraulic block components
33 23 34
14
42
23 Hydraulic block mounting plate
24 Left side hand-hold for lifting boiler
25 Gas valve
26 Flue air pressure switch connection (not used)
27 Fan
28 Fan guard
29 Manual vent point
30 Fan pressure test point
31 Air/gas manifold
32 Compact hydraulic - left mounting point
33 Flow connector from heat exchanger
34 Expansion vessel hose connection point
35 Auto air vent
36 Return connection to heat exchanger
37 Flow turbine housing (not used)
38 Unused port
39 Compact hydraulic - right mounting point
40 Pressure relief valve
41 CH return connection to service valve
42 Internal by-pass
43 CH flow connection to service valve
44 Pressure gauge connection point
35 36
15 41
Boiler information | 9
37
38
39
40
13 12
6 720 646 195a (2010/11)