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Switching / wiring advice for Megaflow with 4x 3kw immersions?
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<blockquote data-quote="64sp" data-source="post: 524372" data-attributes="member: 34791"><p>Hi</p><p></p><p>I have bought a Megaflow 210dddd which is a direct model (electric heating only) with 4x 3kw immersion elements. It’s providing hot water to 2 showers in a swimming pool changing room and so I went with the 4 immersions so that I could get quick re-heat times when the showers are being hammered by the kids!</p><p></p><p>The electrician is coming next week to put the wiring in before the plumbers commission it. I could therefore do with some advice and thoughts about possible/best ways to switch the immersions so that I can have a more educated conversation with my electrician about what I want to achieve. In the past (other houses) I have only had either a single immersion (20amp DP switch to turn on and off) or in one case a top and bottom immersion with one of those bath/shower DP switches to choose between bottom OR top.</p><p></p><p>The consumer unit is close to the water tank and so it will be easy enough for the electrician to run whatever he needs to provide the initial supply (assume it will be a big old cable given the potential for 12kw / 52amps being pulled). I’ll leave that to him.</p><p></p><p>What I am interested in is whether anyone has experience of these 4 immersion versions and what switching options they have installed. The layout seems to be 1 immersion at the bottom, 2 either side of that slightly higher up the tank and then the 4th about half way up the tank. I’m not clear on what that layout says in terms of which ones should be used on their own or together.</p><p></p><p>I do want the potential to have all 4 on at the same time for maximum speed heat up, but equally want to be able to have 1 or 2 on when speed isn’t an issue and/or I just want some hot water for the sinks.</p><p></p><p>Any thoughts on how best to setup the switching?</p><p></p><p>Presumably one option is to have 4x 20amp DP switches and just switch each one separately in whatever combination I want (or all together) but should I have a more sophisticated method?</p><p></p><p>Any thoughts gratefully received!</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="64sp, post: 524372, member: 34791"] Hi I have bought a Megaflow 210dddd which is a direct model (electric heating only) with 4x 3kw immersion elements. It’s providing hot water to 2 showers in a swimming pool changing room and so I went with the 4 immersions so that I could get quick re-heat times when the showers are being hammered by the kids! The electrician is coming next week to put the wiring in before the plumbers commission it. I could therefore do with some advice and thoughts about possible/best ways to switch the immersions so that I can have a more educated conversation with my electrician about what I want to achieve. In the past (other houses) I have only had either a single immersion (20amp DP switch to turn on and off) or in one case a top and bottom immersion with one of those bath/shower DP switches to choose between bottom OR top. The consumer unit is close to the water tank and so it will be easy enough for the electrician to run whatever he needs to provide the initial supply (assume it will be a big old cable given the potential for 12kw / 52amps being pulled). I’ll leave that to him. What I am interested in is whether anyone has experience of these 4 immersion versions and what switching options they have installed. The layout seems to be 1 immersion at the bottom, 2 either side of that slightly higher up the tank and then the 4th about half way up the tank. I’m not clear on what that layout says in terms of which ones should be used on their own or together. I do want the potential to have all 4 on at the same time for maximum speed heat up, but equally want to be able to have 1 or 2 on when speed isn’t an issue and/or I just want some hot water for the sinks. Any thoughts on how best to setup the switching? Presumably one option is to have 4x 20amp DP switches and just switch each one separately in whatever combination I want (or all together) but should I have a more sophisticated method? Any thoughts gratefully received! Thanks [/QUOTE]
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