Installation and Setup
18
Wiring diagrams
Y-Plan
S-Plan
Note 1:
This is a Class II device (i.e., double insulated). A
parking terminal is available for earth wiring if required.
Note 2:
In “Y,” “S” and “W” wiring plans, connections are
shown only for basic boilers. For connections to pump over-
run boilers, consult boiler manufacturer’s instructions.
Note 3:
Gravity circulation hot-water systems should be
fitted with a suitable hot-water control valve as shown in
Plan C on page 19. If this valve is not installed, configure
this device as a Mini-Programmer (see page 24).
Note 4:
For convenience, wiring is shown with connections
made to a 10-way wiring strip in a junction box.
Digital Timer
Digital Timer
