APPLIANCE INFORMATION
6 720 815 724 (2015/11) 7
Fig. 4 Hydraulics
Fig. 5 Control panel
1 Ignition electrode and flame sense
2 Heat exchanger
3 Overheat thermostat
4 Access point for cleaning heat exchanger
5 Low Energy Modulating pump
6 Pressure relief valve
7 Boiler drain point
8 CH return
9 Cover for external wiring connections
10 Control panel in service position
11 System pressure gauge
12 Gas inlet connection 22mm compression
13 Drain hose
14 CH flow
15 Condensate hose (22 mm outlet connection)
16 Trap/Siphon outlet
17 Inlet pressure test point
18 Gas valve
19 Air/Gas adjustment screw
20 Fan pressure test point
21 Fan
22 Primary sensor
23 Expansion vessel
24 Removable panel for servicing
Table 6 Main boiler components
6 720 812 175-07.1O
25
26
27
28
5
25
6
29
30
7
31
32
25 Compact hydraulic mounting screw (2) to boiler
26 Flow connection from boiler heat exchanger
27 Auto air vent
28 Unused port
29 Optional integral diverter valve position
30 Return connection to service valve
31 Internal bypass within plastic moulding
32 Flow connection to service valve
33 Position for optional control
34 Display
35 Fault reset button
36 ECO button (only in conjunction with optional diverter valve)
37 Holiday button (only in conjunction with optional diverter valve)
38 DHW Temperature control (only in conjunction with optional
diverter valve)
39 Mains ON/OFF Indicator/Diagnostic light (blue)
40 CH Temperature control
41 Performance test button
42 Service button
43 Burner ON indicator light (green)
44 Master switch ON/OFF
Table 7 Hydraulics and control panel
6 720 812 175-08.1O
1
2
3
4
5
6
max
2
3
1
04
bar
reset
eco
1
2
3
4
e
6
maxmin
33 34
11
35
36
37
38
39
40
41
42
43
44
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