Question about Stiebel Eltron TEMPRA 24 Tankless Water Heater

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How to wire tempra 24 plus

2 power lines into unit, ( from left to right looking at it from the front ) frist line, ground, then black, then white ? then the next line ground ( to same as frist ) ground,black,white ?

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  • Stiebel Eltron Master
  • 5,245 Answers

1) Copy following link for wiring tankless electric water heater:
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

2) Look at label on side of unit for total KW

3) Product manual shows 24 Kw or 24,000 watts
24,000 watts divided by 240 volts = 100 amps
So your service panel must be about 250Amp rating to support this tankless electric water heater.
http://waterheatertimer.org/pdf/Tempra_tempra-plus-Tankless-electric-water-heater-manual.pdf

4) Look inside the unit to see how many L1L2 terminals show.
You should have two sets L1L2 terminals
http://waterheatertimer.org/images/Terminals-2-tankless-200.jpg

5) You need TWO 60 amp double pole breakers to supply power to this unit.
This means you need TWO #6 wires from one breaker going to L1L2.
And you need TWO MORE #6 wires from 2nd breaker to other set of L1L2 terminals.

6) Add comment for more help Jan 2013

Posted on Jan 07, 2013

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Posted on Jan 02, 2017

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2 Answers

0 when i check it i only get 120 on both when i ground then in 0 when i check the white to black is this right the make is a ge 19.9 hot water heater


You did not post the make and model of the unit. However you should have three wires on a 120 volt heater. Black is HOT. White is neutral and green or bare copper is ground. Anything that you check with a meter connected to black should show 120. white connected to ground across the meter would show 0.

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First, check the circuit breaker. Also, did you upgrade to heavier wiring and a double 60 circuit breaker when you had this installed?

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if its a 240 volt unit,then yes they are both 120 volts for each phase and the 240 volts for combined pair to each terminal on the units thermostats terminals,hope you have a white or green or both for a safety ground though just in case there;s plastic water lines between the supply and the unit

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Are you asking about the cord from themotor to the control? If so It should either be Green Black and white or all those plus a red. The green is the ground and it goes on the green screw. White goes to the common or line(1) post, and usually red is Hi and Blk low for the speeds. If it is a single speed only no red and black will go to the other line(2).

If this does not answer your question please post a comment with what wires and where you are dealing with.

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