I haven't built the top of device yet, but I will use a commonly available wall timer to turn on a solenoid valve that will allow water to flow through a needle valve.
I have decided to use a float switch on the top of the reservoir bucket. It will work this way. Tthe needle valve will be adjusted to allow the correct stream of water to pass through the DI cartridge. I will set the timer for approx hour each day. When the timer activates, the solenoid valve will kick in and allow DI water to fill the 5 gallon bucket. When the water level in the bucket rises above the float valve it will cut the power to the solenoid valve, but not the timer. This way I don't have to match the evaportion level to the timer length setting.
It really wouldn't matter if the bucket overflowed because it's on the balconey which has a drain. The balconey is enclosed so it never gets cold enough to freeze. I wll use a 12~24 volt solenoid and float switch to reduce the potential for electrical shock.
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Originally Posted by TANGOMAN
Anyway, I gotta' go to home Depot now as I'm all excited about timer devices...what are you using ? 110 V or does the unit have a transformer to reduce current ? Is there a risk of your reservoir freezing out on the balcony ?
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