Question about Hatco Corporation Compact Electric Booster Water Heater - 18in W x 24in D x 12in H - 208V - 3

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I have a Hatco c-6 and it is set up for 208 volts 3 phase hook up and the terminals are labled 1-2-3 in the heater.. I have 3 phase and the wires are from the 3 phase panel to the heater..the wires are connected in the panel, and I want to know if the wires are connected in the heater in the same order as in the panel, as the terminals are marked 1-2-3 in the heater...Thank you!

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Thanks for your reply. The order in which you connect the wires 1-2-3 does not matter, all three terminal block screws will accept any one of the hot wires from the breaker, one hot wire per each terminal screw.

Posted on Sep 12, 2010

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No. You have to find out if you have 3 phase or single phase power. If this is a new unit you will find a wiring diagram inside the front cover. 3 phase power has 3 "hot" wires. Single phase has 2 "hot" wires. There is a big difference when you hook it up wrong. I don't know if this is a new installation or if you are replacing an old one. The terminals are numbered for 3 phase. If you look in your breaker box, 3 phase 208 will haven a breaker with 3 spaces hooked together by one bar. Single phase will have two spaces hooked together by a bar. So if the breaker kicks out it will flip all 3 space on 3 phase or 2 spaces on single phase. If you already have wires to the location of the booster heater, you may have to use single phase if that is all that is at that location. If you have single phase power you will have to look at the wiring diagram and you will see the terminal block represented for both single and 3 phase. Normally running from the terminal block will be six wires marked 1 through 6. The wireing diagram will say something like "for single phase put 1,3,5 on terminal 1 and 2,4,6 on terminal 3. Leave terminal 2 out all together. Of course at this point your 2 hot wires will go to terminal 1 and 3. There are other considerations as well. With 3 phase the circuit wires will be smaller gauge and may not carry the current you need for single phase. This is a booster heater. You need to hook up your hot water line to go into the heater and the boosted hot water to your appliance. It will not work to heat your water for other purposes. It is meant to take 140 degree water and boost it to 190 degrees. Good luck, hope this helps

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