I'm trying to find what to look for to get the correct spec. hot water cylinder to work with my Vaillant 418 boiler.
Any recommendations for a conventional indirect open vented hot water cylinder that would be the best spec. heating coil wise to go with the Ecotec 418plus.? The existing tank is approx 1000mm high x 500mm . Its an open vented fully pumped system with 3 port valve and 11 radiators controlled by a Tado wireless control box and wireless rad valves.
I can't seem to find info on how cylinders are measured\& sold, regarding the internal coil\s & how efficient they are at transfering heat to the water. I've seen some that state a kw rating for the cylinder but not sure if thats what I should be looking at??. Most don't seem to say or just say "rapid" or "fast" recovery, what does that mean?.
The system was updated from an older oil fired boiler a couple of years now but I have always had a problem with it cycling when it is only doing the water. I have delved into the boiler settings so that it modulates down to 6kw max output when doing the water, which helps, but it still goes into anti cyling mode after a time. I have come to the conclusion that the coil in the hot water tank can't always take enough heat out of the water before it returns to the boiler & because its return temperature is close to the flow temp the boiler goes into anti cycling mode and shutsdown before starting the same cycle again after 2 mins. etc. etc.
Thanks
Any recommendations for a conventional indirect open vented hot water cylinder that would be the best spec. heating coil wise to go with the Ecotec 418plus.? The existing tank is approx 1000mm high x 500mm . Its an open vented fully pumped system with 3 port valve and 11 radiators controlled by a Tado wireless control box and wireless rad valves.
I can't seem to find info on how cylinders are measured\& sold, regarding the internal coil\s & how efficient they are at transfering heat to the water. I've seen some that state a kw rating for the cylinder but not sure if thats what I should be looking at??. Most don't seem to say or just say "rapid" or "fast" recovery, what does that mean?.
The system was updated from an older oil fired boiler a couple of years now but I have always had a problem with it cycling when it is only doing the water. I have delved into the boiler settings so that it modulates down to 6kw max output when doing the water, which helps, but it still goes into anti cyling mode after a time. I have come to the conclusion that the coil in the hot water tank can't always take enough heat out of the water before it returns to the boiler & because its return temperature is close to the flow temp the boiler goes into anti cycling mode and shutsdown before starting the same cycle again after 2 mins. etc. etc.
Thanks
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