Worcester 29CDi Classic Installation, Commissioning And Servicing Instructions page 7

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
41
34
35
36 37
Fig. 4 Hydraulics
6 720 815 725 (2015/05)
6
30
33
32
31
29
41
8
40
38 9 39
6 720 812 176-07.1O
48
47
46
45
2
1
42
43
Fig. 5 Control panel
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
7
52 DISPLAY
53 POSITION FOR OPTIONAL PLUG-IN CONTROL
Table 4 Hydraulics and control panel
APPLIANCE INFORMATION
53
reset
eco
4 4
3 3
5 e
2
6 1 6
max min max
52
15
2
1 1 3
0 4
bar 51
50
49
44
6 72 812 176-26.1O
7