Worcester 12/14 Installation And Servicing Instructions page 18

Fig. 18. Honeywell 'S' Plan.
NOTE: When using a WHS programmer set the switch on the rear of the programmer to 'P'.
Remove link 1 to 3 and link 2 to 4 and make link 3 to 4
Fig. 19. Honeywell 'Y' Plan.
NOTE: When using a WHS programmer remove the orange wire from terminal 9 and
connect to terminal 6. Set the switch on the rear of the programmer to 'P'.
Remove link 1 to 3 and link 2 to 4 and make link 3 to 5.
N
Room thermostat Heating Valve. Honeywell V4043H
E N L
L N E E N 1 2 3 4 5 6
Room thermostat
E N L
L N E E N 1 2 3 4
10
7 8 9
L
N
E
Cylinder
Thermostat
HEAT SYSTEMS
OFF OFF
HOT
TWICE TWICE HEATING
PM
WATER
ONCE ONCE ADVANCE
TUE
ADVANCE ON ON
SELECT LOCK SET? YES SELECT
Burner Socket
Blue
Pump (supplied in boiler)
Brown
7 8 9 10
5 6
HEAT SYSTEMS
OFF
HOT
TWICE PM
WATER
ONCE
TUE
ADVANCE ON
SELECT LOCK SET? YES
Burner Socket
18
Pump (supplied in boiler)
1112 13 14 15
Hot Water Valve
Honeywell V4043H
Optional
Worcester
Programmer
N
1112 13 14 15
Mid Position Valve
Honeywell V4073A
Green/Yellow
E
Blue
N
Grey
Orange
White
Cylinder
C 2
Thermostat
1
Optional
Worcester
Programmer
OFF
HEATING
TWICE
ONCE ADVANCE
ON
SELECT