APPLIANCE INFORMATION
6 720 804 532 (2012/09)
8
Fig. 2
Hydraulic block components
1
Expansion Vessel
23
Hydraulic block mounting plate
2
Sensor - Boiler flow
24
Left side hand-hold for lifting boiler
3
Removable panel - for servicing
25
Gas valve
4
Electrode assembly
26
Flue air pressure switch connection (not used)
5
Overheat thermostat
27
Fan
6
Securing nut - Air/Gas manifold clamp
28
Manual vent point
7
Silicon tube - heat exchanger air vent
29
Fan pressure test point
8
Heat exchanger
30
Air/Gas manifold
9
Flue over heat thermostat
31
Compact hydraulic - left mounting point
10
Access panel - Heat exchanger/sump cleaning
32
Flow connector from heat exchanger
11
Right side hand-hold for lifting boiler
33
Expansion vessel hose connection point
12
Diverter valve assembly (body)
34
Auto air vent
13
Diverter valve actuator (stepper motor blank)
35
Return connection to heat exchanger
14
Pump
36
Flow turbine housing (not used on i System)
15
Drain point
37
Unused port
16
Central Heating (CH) return isolator
38
Compact hydraulic - right mounting point
17
System pressure gauge
39
Pressure relief valve
18
Control panel (in service position)
40
CH return connection to service valve
19
Cover - external wiring connections
41
Internal by-pass
20
Cover - PCB
42
CH flow connection to service valve
21
Gas inlet connection 22 mm
43
Pressure gauge connection point
22
Central Heating (CH) flow isolator
Table 5 Boiler components
6720804532-04.1W
o
31
32
23
34
33
35
36
37
38
39
43
42
12
41
15
40
14
13