Wiring Diagrams:

* contains Internal Wiring diagram

Heating Controller	Combi Boiler (230v) *	S-Plan System	S-Plan-Plus (Radiators)	S-Plan-Plus (Manifold Wired to Boiler)	S-Plan-Plus (Manifold Not Wired to Boiler)	Parallel Wiring for 2 Boilers	Immersion Heater *	Electric Heating *	Range Extender *

Heating Controller

Combi Boiler
(230v) *

S-Plan System

S-Plan-Plus
(Radiators)

S-Plan-Plus
(Manifold Wired
to Boiler)

S-Plan-Plus
(Manifold Not Wired
to Boiler)

Parallel Wiring for 2 Boilers

Immersion
Heater *

Electric
Heating *

Range Extender *

Electric Switch

Electric Relay

Powered Thermostat

	Wired to Boiler			Not Wired to Boiler

Boiler Controllers	Combi Boiler (Volt-Free)	Combi Boiler (230v) *	S-Plan System (Radiators)	S-Plan System (Underfloor Wired to Boiler)	S-Plan System (Underfloor Not Wired to Boiler)	Y-Plan System	S-Plan-Plus System	Underfloor 12v/24v	Range Extender	EOGB

Boiler Controllers	Combi Boiler (Volt-Free)	Combi Boiler (230v) *	S-Plan System (Radiators)	S-Plan System (Underfloor Wired to Boiler)	S-Plan System (Underfloor Not Wired to Boiler)	Y-Plan System	S-Plan-Plus System	Underfloor 12v/24v	Range Extender	EOGB
Single Channel Receiver
Dual Channel Receiver
In Wall Range Extender
OpenTherm Installation

Schematics:

Control system	Schematic

Control system	Schematic
Heating Only	Combination Boiler
With Hot Water	On/Off Hot Water	Temperature Hot Water Irish Hot Water
S-Plan-Plus
230v Underfloor (Multi-zone)	Wired Back to Boiler Wiring Centre No Wiring Centre Powered Room Thermostats	Not Wired Back to Boiler Wiring Centre No Wiring Centre
230v Underfloor (Single Zone)	Wired Back to Boiler	Not Wired Back to Boiler
24v Underfloor	Wired Back to Boiler	Not Wired Back to Boiler
Electric Heating	Electric Heater