Question about Intermatic WH40 - Water Heater Time Switch - NEMA 1 Indoor Steel Case - DPS
I would use two 40amp contactors in series with the 2 pole breakers and then cycle them with the Time clock. The time clock can't handle the amperage but the contactors can. You can use 240 volts to power the time clock or 110 volts and then you will have to match the coil voltage of the contactor to the power you use for the time clock....... and cycle both contactors at the same time with the time clock......Hope this helps. As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician or HVAC tech to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician or HVAC tech to advise what work is needed.
Posted on Mar 27, 2011
You probably could but my question would be "why?" Water heater timers are made to turn power off to waterheaters during the times that we dont need hot water, like in the middle of the night or while you are at work. This keeps the hot water heater from working during those times and wasting energy (gas or electric). Tankless water heaters already have this builtin because they only work when you actuallty turn on the hot water. If the hot water faucet is not turned on, the tankless heater never comes on. It does not use a bit of energy until the hot water is actually turned on. So it will not be using energy during the night or while you are at work. So there really is no reason to do what you are thinking about unless you have another reason that I cant think of. Tankless heaters are great and this is why they save 60% of energy of conventional tank heaters.
Posted on Mar 27, 2011
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Posted on Jan 02, 2017
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