There are many 3 port producers including honeywell horstmann and danfoss to name but a few. 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.
Potterton Ep2002 Wiring Manual
Boiler y plan wiring diagram. 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. This diagram shows the wiring layout using the most typical components. Y plan wiring diagram for system boiler. Other wires are shown in pale grey. Central heating boilers combi boilers gas boilers oil boilers gas central heating heating engineers boiler installation boiler repair. 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.
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. Here coloured wires indicate the permanent mains supply to the boiler and programmer. The reason this system is called a y plan is because of the shape of the 3 port valve. The three additional coloured valve wires are also shown white grey and orange. 20 switchee installation manual section 8. 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.
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. Greenstar ri regular wiring diagram if your product was manufactured before 01122016 see below for appropriate versions of this document. 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. Common faults on y plan heating systems. 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. Wiring diagrams s plan boiler wiring diagram hot water tank 240v50hz mains l 3a n.
Gallery of Boiler Y Plan Wiring Diagram
