Posted October 8, 20186 yr I've got a 32 tube system heating water in a 200l geyser. I would like to connect some sort of relay-valve and monitor the temperature and then open the valve if say the temperature goes above 75 and close it if reaches 65 degrees. At the moment I'm just covering 12 of the tubes in summer but then on cloudy days the performance is not so great. What would be the most reliable way of achieving this? I've got a geyserwise so would be awesome if one could plug into the sensor for that. I'll dump the extra hot water into the swimming pool as I have to top it up with water anyway.
October 8, 20186 yr 49 minutes ago, Tersius said: I've got a 32 tube system heating water in a 200l geyser. I would like to connect some sort of relay-valve and monitor the temperature and then open the valve if say the temperature goes above 75 and close it if reaches 65 degrees. At the moment I'm just covering 12 of the tubes in summer but then on cloudy days the performance is not so great. What would be the most reliable way of achieving this? I've got a geyserwise so would be awesome if one could plug into the sensor for that. I'll dump the extra hot water into the swimming pool as I have to top it up with water anyway. Same here, my geyser at the moment is 76 degrees and rising and I only have 20 tubes on a 200L
October 16, 20186 yr I wonder whether a thermostat and a radiator would not work and one could "bleed off" hot water without losing the water itself.
October 16, 20186 yr 30 minutes ago, Chris Hobson said: without losing the water itself Yeah, I was sitting here thinking how privileged are you that you can dump water into your swimming pool... :-)
October 16, 20186 yr 5 hours ago, plonkster said: Yeah, I was sitting here thinking how privileged are you that you can dump water into your swimming pool... :-) some would be lost to steam as well. Unless you connect it to a pipe running directly into the water?
October 16, 20186 yr If you removed a few tubes instead of covering up 12 out of the system and plugged them back in if needed in winter. I cut a heater manifold up to add an additional 5 tubes to my system, 12 would have been too much. Most days I get 65°C plus on a 200l geyser.
October 16, 20186 yr 26 minutes ago, seant said: I cut a heater manifold up to add an additional 5 tubes to my system, 12 would have been too much. Most days I get 65°C plus on a 200l geyser. Please explain more, what heater manifold did you use?
October 17, 20186 yr On a split system , if you unscrew the outer aluminum cover of the manifold there is some insulation and then a copper pipe with pockets that the centre core of the vacuum tube plugs into. Figure out how many tubes you want and then be brave and cut the copper pipe, and the outer cover to match maybe a fraction longer. Cut a few slits into the end of the copper tube and squeeze them together to reduce it to about 22mm and braze about a 10cm lenght of 22mm copper pipe onto the end. And reassemble
October 26, 20186 yr Author The idea is to try and minimize human intervention, covering up or removing tubes are an ineffective way of reducing the heat and backfires on cloudy days. On 2018/10/16 at 9:52 AM, Chris Louw said: Tersuis . The Geyser Wise Max do have a dumpvalve that is avialable . That looks promising, I have the TSE version installed. Will call them and ask if that model can do the same thing.
October 26, 20186 yr Author On 2018/10/16 at 8:09 AM, plonkster said: Yeah, I was sitting here thinking how privileged are you that you can dump water into your swimming pool... 🙂 Hehe we lose quite a bit of water with evaporation so have to keep the damn thing topped up all the time.
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