APPLIANCE INFORMATION
6 720 812 175 (2014/07)
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
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
0
4
bar
1
reset
eco
1
2
3
4
e
6
max
min
33
34
11
35
36
37
38
39
40
41
42
43
44