Worcester WM 12 Installation And Servicing Instructions page 18

Fig. 18. Honeywell 'Y' Plan - facia mounted programmer.
NOTE: Remove link 2 to 4.
Remove orange wire from 9 and relocate to 6.
Set the switch on the rear of the programmer
to "P".
Wire from "L" to Honeywell junction box con-
nection 1 only required if the optional frost
thermostat is fitted.
NOTE: Honeywell wiring centre (Part No.
42005748-001) should not be used.
blue
brown
white
grey
18