Worcester WM 12 Installation And Servicing Instructions page 19

Fig. 19. Honeywell 'Y' Plan - 10 way junction box.
V4073A
Mid position
zone valve.
blue
green/yellow
white
L641A
T6160B
Cylinder stat.
Room stat.
1
2 1 3
C
2
1 N E 4 5 6 7 8 9 10
Optional
frost
thermostat.
Time controller.
NOTE: When using a Worcester facia mount-
ed programmer do not wire in this time con-
troller. Wire as shown in Fig.18.
19