I have replaced an vented cylinder with and unvented cylinder and am having difficulty replacing the single cylinder thermostat wiring with a dual thermostat. I basically have the cylinder 2 port valve and pump.
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Unvented cylinder wiring diagram. All electrical wiring must be carried out by a qualifi ed electrician and be installed in accordance with current iee wiring regulations. The cyclone air unvented range of cylinders are manufactured with quality and precision to the fore. The outer casing is a combination of resilient thermoplastic mouldings and plastic coated corrosion proofed steel sheet. Before any work switch off the mains supply to the appliance and the mains water supply. The original system is a drayton bi flo control packs. The cylinder is a purpose designed unvented water heater.
Output from the normal cylinder thermostat is. Danger this cylinder is unvented and as such becomes pressurised when in operation. What youve said is consistent with a couple of wiring diagrams i found online for other manufacturers of unvented cylinders. Do not switch on if there is a possibility that the water in the cylinder is frozen. Looking for a basic understanding and help with terminals. These are shown at the bottom right of the diagram.
As part of a rewire im connecting up an unvented system and separate boiler for the heating. I have attached a diagram of an example of the wiring for a heatrae sadia megaflow unvented indirect hot water cylinder in case anyone else is interested in this. Wiring is based on the standard y plan with the addition of a high limit thermostat and a 2 port motorised valve. The combination of pressurisation and hot water could lead to. An unvented cylinder is sealed under pressure and overheating will cause the pressure inside to rise to dangerous levels. The original wiring from the lwc1 wiring centre was.
After reading countless discussion threads on various forums i hadnt been able to work out whether the zone valve was only intended to be an emergency shut off or whether it should also shut off whenever the control. All products are insulated. The internal expansion provides a neat installation. 28 2 port mechanical diagram 29 2 port electrical diagram 30 3 port mechanical diagram. The cyclone air brand signifies the next generation of hot water cylinder development. The pre plumbed cold feed assembly ensure consistency and quality every time.
Boiler pump and stat for heating all working but i have no experience of unvented cylinders. Obviously people should refer to the exact wiring diagram for the unvented hot water cylinder that they are wiring and not take it for granted that this would be correct for all. Terminal 14 common went to c on the hts3 thermostat. Hi hoping someone can help me out. The unit has a stainless steel inner vessel which ensures an excellent standard of corrosion resistance. Unvented mains pressure water heaters 120 150 170 210 250 and 300 litre capacity indirect models installation and servicing instructions pack contents the centerstore unvented cylinder water heater incorporating immersion heaters and thermal controls l factory fi tted temperaturepressure relief valve l cold water combination valve assembly.
Gallery of Unvented Cylinder Wiring Diagram
