The diagram set includes wiring plans for a number of popular configurations of central heating systems c plan w plan y plan s plan s plan etc. The reason this system is called a y plan is because of the shape of the 3 port valve.
Central Heating Electrical Wiring Part 3 Y Plan
Boiler y plan wiring diagram. This diagram shows the wiring layout using the most typical components. There are many 3 port producers including honeywell horstmann and danfoss to name but a few. Y plan wiring diagram for system boiler. And you should select the most appropriate diagram that matches the components you have installed in your system along with what youre hoping to achieve in terms of controllability. One common fault that you may find with y plan systems is that the boiler keeps running and heating the radiators even when the controls are not calling for heating. Y plan boiler wiring diagram hot water tank zone valve no n com heat 240v50hz mains n bl w o gr no com nc no l water nc l water l 3a boiler power supply n lr 0v h2 w1 12v 0v h2 w1 12v bru.
Common faults on y plan heating systems. Here coloured wires indicate the permanent mains supply to the boiler and programmer. Wiring diagrams s plan boiler wiring diagram hot water tank 240v50hz mains l 3a n. Faq v4073a mid position y plan valve operation how a mid position valve operates within a sundial y plan heating system faq w plan hot water priority system how a w plan heating system operates faq pump overrun wiring diagrams for y plan incorporating a st9400 programmer. Central heating boilers combi boilers gas boilers oil boilers gas central heating heating engineers boiler installation boiler repair. Heated water from the boiler is diverted to the hot water coil or the radiators depending on which service the programmer is asking for and which thermostat is.
This can be due to the reduced voltage running through the motorised valve from the grey wire hot water off to the orange wire switch. Other wires are shown in pale grey. 20 switchee installation manual section 8. V4073a y plan how a mid position valve operates within a y plan heating system how a w plan heating system operates faq pump overrun wiring diagrams for s plan incorporating a st9400 programmer. Greenstar ri regular wiring diagram if your product was manufactured before 01122016 see below for appropriate versions of this document. The three additional coloured valve wires are also shown white grey and orange.
Gallery of Boiler Y Plan Wiring Diagram
