Worcester GREENSTAR 24i Junior Installation Instructions Manual page 9

1 Expansion Vessel
2 Flow temperature sensor (NTC)
3 Removable panel - for servicing
4 Electrode assembly
5 Overheat thermostat
6 Securing nut - Air/Gas manifold clamp
7 Silicon tube - heat exchanger air vent
8 Heat exchanger
9 Flue over heat thermostat
10 Access panel - Heat exchanger/sump cleaning
11 Right side hand-hold for lifting boiler
12 Pump
13 Diverter valve assembly (body)
14 Diverter valve actuator (stepper motor)
15 Diverter valve protective cover
16 Drain point
17 Central Heating (CH) return isolator
18 Domestic Cold Water mains (DCW) isolator
19 System pressure gauge
20 Control panel (in service position)
21 Cover - external wiring connections
22 Cover - transformer and PCB
23 Gas inlet connection 22 mm
24 Domestic Hot Water (DHW) connection
25 Central Heating (CH) flow isolator
Tab. 7 Boiler components
35
50
49
48
47
Fig. 2 Hydraulic block components
6 720 644 741a (2010/10)
36 27 37
12 46
26 Left side hand-hold for lifting boiler
27 Plate to Plate heat exchanger
28 Gas valve
29 Flue air pressure switch connection (not used)
30 Fan
31 Fan guard
32 Manual vent point
33 Fan pressure test point
34 Air/Gas manifold
35 Compact hydraulic - left mounting point
36 Flow connector from heat exchanger
37 Expansion vessel hose connection point
38 Auto air vent
39 Return connection to heat exchanger
40 Flow turbine
41 Unused port
42 Compact hydraulic - right mounting point
43 Pressure relief valve
44 CH return connection to service valve
45 DCW in connection to service valve
46 Internal by-pass
47 DHW out connection
48 CH flow connection to service valve
49 Pressure gauge connection point
50 DHW temperature sensor (NTC)
38 39
45 16 44
APPLIANCE INFORMATION
40
41
42
43
14 13
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