A Y Plan wiring diagram for fully pumped central heating and hot water systems with pump overrun, includes connections for the boiler, 3 port valve, hot water tank stat, room thermostat and central heating wiring centre connections.
You can download the Y plan central heating system wiring diagram at the bottom of this post.
The first number is the terminal number of the Y plan wiring centre.
Hot water tank thermostat wiring for hot water temperature control on Y Plan hot water systems.
Room temperature thermostat wiring for room temperature control of the central heating system for Y Plan central heating systems.
3 port mid position valve wiring colours and Y plan wiring centre terminal numbers.
Y Plan boiler wiring diagram with pump overrun, shown below first is the cable (function) followed by the terminal number of the Y plan wiring centre for system boiler wiring diagrams.
Y plan central heating & hot water programmer wiring diagram, shown below first is the cable (function) followed by the terminal number of the Y plan wiring centre.
Y plan power supply connections, shown below first is the cable (function) followed by the terminal number of the Y plan wiring centre.
Y Plan wiring diagram for fully pumped systems with pump overrun.
Note: Some earths have been omitted for clarity. Always check and follow the manufactures instructions as it may differ.
| Y Plan Central Heating Wiring Table | |
|---|---|
| Switched Fused Spur | Y Plan Wiring Centre Terminal |
| Live | 1 |
| Earth | 2 |
| Neutral | 3 |
| Boiler | Y Plan Wiring Centre Terminal |
| Live | 1 |
| Earth | 2 |
| Neutral | 3 |
| Switched Live | 8 |
| Pump Live | 9 |
| Pump | Y Plan Wiring Centre Terminal | Live | 9 |
| Earth | 2 |
| Neutral | 3 |
| 3 Port Valve | Y Plan Wiring Centre Terminal |
| Green/Yellow | 2 |
| Blue | 3 |
| White | 5 |
| Grey | 7 |
| Orange | 8 |
| Hot Water Thermostat (Tank Stat) | Y Plan Wiring Centre Terminal |
| Live | 6 |
| Switched Live 1 | 8 |
| Switched Live 2 (HW off) | 7 |
| Central Heating Thermostat (Room Stat) | Y Plan Wiring Centre Terminal |
| Live | 4 |
| Neutral | 3 |
| Switched Live | 5 |
| Programmer | Y Plan Wiring Centre Terminal |
| Live | 1 |
| Earth | 2 |
| Neutral | 3 |
| HW Off | 7 |
| HW On | 6 |
| CH On | 4 |
| Y Plan wiring details for fully pumped central heating systems with pump overrun | |
Y Plan Wiring Diagram.pdf
Y Plan Wiring Schematic.pdf
Download this blog post: Y Plan Boiler Wiring.pdf
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