Honeywell L641A1039 Cylinder Stat, 230 V

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This video covers the wiring and electrical operation of a Y plan system. Wiring diagrams and further information continues below. View on Youtube. System Wiring Referring to your photo, remove and label each wire. If a terminal has multiple designations like W and O/B, it will be labeled as W and O/B and not just one or the other.

In this guide, we will walk you through the wiring process step by step, providing clear instructions and helpful tips along the way. Whether you’re a seasoned DIY enthusiast or a complete beginner, this guide will give you the confidence and knowledge to successfully wire your Honeywell Cylinder Stat and enjoy the benefits of a reliable and efficient home heating system. Understanding Honeywell Cylinder Stat Wiring

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Here, power is also applied to programmer terminal 4, which connects via wiring centre terminal 4 to the room thermostat. If heat is required, power continues to terminal 5 in the wiring centre, and therefore to the white valve wire.

Comfort meets convenience with Honeywell Home thermostats. We know how important it is to keep our homes nice and warm, especially during the colder months, and that’s why here at Plumbworld, we offer a range of Honeywell Home Thermostats, offering a collection of analogue and digital programmable thermostats which will easily have your home temperature under control. Boasting advanced technology and modern features, the Honeywell thermostat does the clever stuff for you by managing the hot water flow from your boiler to your radiators or underfloor heating system. Locate any unconnected wire labeled W or W1. If you identified an O, B, or O/B wire connecting to the O/B terminal in the previous step and it has a separate W wire, place it into the W2 terminal. Connect the W wire to the W terminal if you don’t have a wire connected to the O/B terminal.

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This scheme uses a 3 port mid position valve. In the past this was by far the most common setup, as it only requires one valve. Identify any wires labeled R, RH, or RC. You typically have one or two of those three. If you have one wire — even if it’s labeled RC — it goes into the R terminal, setting the jumper connecting terminals R and RC in place. Thermostats may have a jumper switch, metal staple, or plug. The jumper may also be a wire connecting the two terminals. If you have two wires, R or RH go into the R terminal and RC into the RC terminal. If you have more than one wire (for example, you have a wire labeled R and another wire labeled Rc), remove any jumpers between the R and Rc terminals or push the switch to open the RC terminal to insert a wire. Your new thermostat may not be directly compatible if you see terminals labeled A B C, or 1 2 3, as your system requires a communicating thermostat. As correct operation relies on the valve internals functioning properly, valve failure will result in some non-obvious situations. Heating only does not work