APPLIANCE INFORMATION
6 720 815 725 (2015/05)
7
Fig. 4
Hydraulics
Fig. 5
Control panel
The diagram opposite shows the controls in the servicing position
and excludes the outer case
1
REMOVABLE TOP CASE PANEL FOR SERVICING
2
IGNITION ELECTRODES AND FLAME SENSE ELECTRODE
3
HEAT EXCHANGER
4
OVERHEAT THERMOSTAT
5
ACCESS POINT FOR CLEANING HEAT EXCHANGER
6
PLATE TO PLATE DHW HEAT EXCHANGER
7
LOW ENERGY MODULATING PUMP
8
PRESSURE RELIEF VALVE
9
DRAIN HOSE
10 DCW MAINS ISOLATING VALVE
11 CH RETURN ISOLATING VALVE
12 CHARGING LINK ASSEMBLY
13 COVER FOR EXTERNAL WIRING CONNECTIONS
14 CONTROL PANEL IN SERVICE POSITION
15 SYSTEM PRESSURE GAUGE
16 GAS ISOLATING VALVE
17 DHW OUTLET CONNECTION
18 CH FLOW ISOLATING VALVE
19 CONDENSATE DRAIN CONNECTION
20 CONDENSATE SIPHON
21 INLET PRESSURE TEST POINT
22 GAS VALVE
23 DHW TEMPERATURE SENSOR (NTC)
24 AIR / GAS - ADJUST MAXIMUM SETTING SCREW
25 FAN PRESSURE TEST POINT
26 FAN
27 PRIMARY SENSOR
28 EXPANSION VESSEL
Table 3 Main boiler components
6
34
41
33
29
30
32
31
6 720 812 176-07.1O
7
40
8
41
36
35
37
38
39
9
29
FLOW TURBINE
30 UNUSED
PORT
31
RETURN CONNECTION TO BOILER HEAT EXCHANGER
32
AUTO AIR VENT
33
EXPANSION VESSEL CONNECTION
34
FLOW CONNECTION FROM BOILER HEAT EXCHANGER
35 DHW
SENSOR
36
CH FLOW CONNECTION TO PRE-PLUMBING MANIFOLD
37
DHW OUT CONNECTION TO PRE-PLUMBING MANIFOLD
38
DCW IN CONNECTION FROM PRE-PLUMBING MANIFOLD
39
CH RETURN CONNECTION FROM PRE-PLUMBING MANIFOLD
40 DIVERTER
VALVE
41
COMPACT HYDRAULIC MOUNTING SCREW (2) TO BOILER
42
CH TEMPERATURE CONTROL
43
MAINS ON/OFF INDICATOR/DIAGNOSTIC LIGHT (BLUE)
44
DHW TEMPERATURE CONTROL
45
PERFORMANCE TEST BUTTON
46
SERVICE BUTTON
47
BURNER ON INDICATOR LIGHT (GREEN)
48
MASTER SWITCH ON/OFF
49
HOLIDAY BUTTON
50
ECO BUTTON
51
FAULT RESET BUTTON
52
DISPLAY
53
POSITION FOR OPTIONAL PLUG-IN CONTROL
Table 4 Hydraulics and control panel
48
47
46
45
42
43
15
53
52
51
50
49
44
1
2
3
4
5
6
max
2
3
1
0
4
bar
1
reset
eco
1
2
3
4
e
6
max
min
6 72 812 176-26.1O
