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If all the trippers are removed and I want the heather to work only when the shower is open... how should I leave the light of the timer (On or Off) ? Dec 28, 2013
Your question is unclear. But maybe this will help: When the red light is on, the 240volt current is active and may be flowing if the thermosat in the hot water heater is calling for it; when it's not on, it's there is current to the heating element in the water heater. If you have an instant-heat hot water set-up, you wasted your money on this timer -- it's for those who have hot water sitting in a tank and who want to draw current only parts of the day, say when electricity is cheaper (for those with time of day metering) or as a back-up to solar hot water on cloudy days. I've also used this device inside a spa back when I lived in Maryland where, at that time, electricity was lots, lots cheaper at night than during the day and evening hours.
It means that the timer has shut off the power to the water heater
I replaced one in my house, wiring the new one exactly as the old one, but now the clock runs backwards. How do I get it to run the right way? Jan 6, 2015
?????????? black wire to black wire green to green ,,,, white wire to whitewire, ground wire should rear that the way mine was
My beach house goes unrented for long periods. I need a timer that turns the water heater off for weeks, rather than hours. Will this one work for me? Jan 7, 2014
Not 100% sure, but from my experience this is just a 24 hour timer-not programmable the way you require- I recommend a different one for that function.
If your water heater plugs into an outlet, a regular timer will work fine. Most water heaters, however, are 220 volt lines on a dedicated circuit, thus you need something more like the WH21. Here's a good reference for you: http://michaelbluejay.com/electricity/waterheatertimer.html
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