Worcester WM 12 Installation And Servicing Instructions page 4

Fig. 2. Internal view of the appliance.
Phial
retaining
spring
2
Wall
mounting
duct
1
5
7
Phial
retaining
spring
thermostat
Manual reset
high limit
thermostat
3
9
Internal
Remote
control
lockout
box
button
Frost
Phial
retaining
spring
Duct manual
reset
thermostat
M6 nut and
washer
4
6
Optional
programmer
position
8
10
reset
Thermostat
Knob
1. Wall mounting bracket
2. 'D' Shaped grommet
3. Central Heating return
4. Central heating flow
5. Main harness
4
Split pin
Automatic reset
Control
thermostat
Cabinet
6. Heatexchanger
7. Earth stud
8. Boiler Drain point
9. Control box locking screw
10. Serial number label
high limit
thermostat