Wiring diagrams and further information continues below. The problem is that telford only show a wiring diagram for an s plan in the installation manual.
Honeywell Wiring Diagram Y Plan Honeywell Y Plan Wiring
Unvented cylinder y plan wiring diagram. This diagram shows the wiring layout using the most typical components. These terminals are joined together with the grey wire from the motorised valve. This video covers the wiring and electrical operation of a y plan system. The outer casing is a combination of resilient thermoplastic mouldings and plastic coated corrosion proofed steel sheet. These are shown at the bottom right of the diagram. X range x plan wiring diagram unvented cylinder option gyellow cut off dhw sl coil.
Unfortunately the installer has not been able to work out how to wire it. Wiring is based on the standard y plan with the addition of a high limit thermostat and a 2 port motorised valve. Here coloured wires indicate the permanent mains supply to the boiler and programmer. The problem is due to the combined cylinder stat and overheat stat. The unit has a stainless steel inner vessel which ensures an excellent standard of corrosion resistance. Output from the normal cylinder thermostat is connected to the high limit thermostat and the output from that powers the 2 port valve motor.
The cylinder is a purpose designed unvented water heater. Though they do say that a y plan can be used with the safety zone valve. All products are insulated. Orange grey wires from ch zone are not required please isolate opentherm make safe. Heating control ntc cylinder sensor connect timer to the no dhw demand nc no dhw e orange grey 2. In a y plan heating system you must have a wire connecting the hot water off terminal at the programmer usually terminal number 1 and the satisfied terminal on the cylinder thermostat.
Gallery of Unvented Cylinder Y Plan Wiring Diagram
