Thats what mine has a control box on the side plugged into 240v socket. The other day I could hear the gas on and I switched this off to plug the water tank pump in (Only one socket for this and the water pump) and I heard the flame go out?
So does the solar provide hot water into the tank and the gas is only used if its not warm enough? Ive also noticed you cant turn the water temp down at all as the dial has been riveted on at its hottest setting.
I'm not solar HW plumber, but I did do a little research into it when we had ours installed.
My system has two plugs, one to the gas booster, and one to the controller.
The controller is responsible for sending hot water to the roof when the roof is hot and the water at the top of the tank is less than 85C. Once the water at the top of the tank gets to 85C, they assume the whole tank is hot.
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Then the water is drawn through an entirely separate system which is the gas boost, whch has its own powersupply. The power is just to run the electronics and electronic ignition, fan etc.
There is a pipe between the tank and the inlet to the gas boost, and generally this will have cooled to below 65C, so the gas will almost always turn on for a second or two, but will turn off or dial back, depending on how hot the tank water is.
Most inifnity systems can be dialed to a temp by a remote controller, but the solar ones are fixed to 65C. I suspect this is to combat legionaires or something like that
And then, dumb regulations mean the whole shebang gets plumbed past a tempering valve which I managed to turn up from 48C to 55C. That basically dilutes the hotwater with cold water.
similar to this, older model, all stainless tank, and 400L
http://www.rinnai.com.au/index.php?option=...id=2&id=161