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LAYOUT & COMPONENTS
The diagram opposite shows the controls in the
servicing position and excludes the outer case.
1 AIR / GAS MANIFOLD
2FAN
3 AIR / GAS ADJUSTMENT SCREW
4GAS VALVE
5 INLET PRESSURE TEST POINT
6 EXPANSION VESSEL
7 WALL MOUNTING FRAME
8 COVER FOR EXTERNAL WIRING
CONNECTIONS
9 CONDENSATE CONNECTION FROM
HEAT EXCHANGER
10 PLATE TO PLATE
DHW HEAT EXCHANGER
11 FLUE PRESSURE SWITCH
12 FAN PRESSURE TEST POINT
13 MANUAL VENT POINT
14 IGNITION AND FLAME SENSE ELECTRODES
15 OVERHEAT THERMOSTAT
16 FLAME VIEWING MIRROR
17 SECURING NUT, AIR /
GAS MANIFOLD CLAMP
18 SENSOR - BOILER FLOW
19 FLUE AIR PRESSURE SWITCH
CONNECTION
20 FLUE OVERHEAT THERMOSTAT
21 ACCESS POINT FOR CLEANING HEAT
EXCHANGER/SUMP
22 REMOVABLE TOP CASE PANEL FOR
SERVICING
23 GAS INLET CONNECTION 22mm
COMPRESSION
24 TRAP / SYPHON
25 TRAP / SYPHON OUTLET
CONNECTION ( 22mm PLASTIC PIPE)
26 MAINS COLD WATER IN
27 CH FLOW
28 DHW OUT
29 CH RETURN
30 DRAIN POINT
31 SILICONE TUBE (USE TO VENT AIR
FROM HEAT EXCHANGER)
32 PUMP
33 SYSTEM PRESSURE GAUGE
34 CONTROL PANEL IN SERVICE
POSITION
35 HEAT EXCHANGER
36 ACCESS COVER FOR TRANSFORMER &
PCB
LAYOUT & COMPONENTS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior
8 716 107 336b (11/05)
6
APPLIANCE
INFORMATION