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Hook up to 4 wire system 240v with rlv310 thermostat?

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Posted on Oct 06, 2009

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Posted on Jan 02, 2017

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Electric Wall heater programmable thermostat


First of all most home thermostats operate on 24volts. If you want to have one that directly turns the 240 volt power on and off you need to get a special 240V line voltage thermostat. How many wires come out of your heater? Most 240v circuits have three wires. A white wire for the common and two black or black red wires that are +120 volts and negative 120 volts. That's why a 240 volt plug has 3 prongs instead of two. If you look at the wiring diagram that comes with the thermostat it should give you an idea of how to hook the wires up. In your particular case though, I think I would try making friends with an electrician.

Nov 09, 2013 | Hardware & Accessories

1 Answer

Intermatic T103P Timer (120V) Wiring Guidance


Copy following link for T103 timer wiring options:
The clock motor is 120Volts, but clock motor can be changed from WH1570 to WG1573, and this action changes 120V T103 into 208-277V T104 timer:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T103

Jun 08, 2012 | Intermatic Hardware & Accessories

1 Answer

I need to wire a remote thermostat to my electric wall heater in the bathroom. Not sure if I run the wire from the panel to the heater first or to the remote thermostat then the heater.


Run the wire to the thermostat then to the heater

BASEBOARD WIRING WITH A SINGLE POLE (2 WIRE) WALL THERMOSTAT - 120V OR 240V SUPPLY
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BASEBOARD WIRING WITH A DOUBLE POLE (4 WIRE) WALL THERMOSTAT - 120V OR 240V SUPPLYdennis675_0.gif

Jun 21, 2011 | Heating & Cooling

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I have a Et 70115C Intermatic Timer, I want to install it on my Hot Water Heater, I have connected the 2 110V leads from my breaker to Terminals 1 & 2 and connected the two leads from the hot water...


A) 5 terminal ET70115C.
Voltage selector set to 240.

B) BUT you say you have 120Volts from breaker >>> confusing, so I'm proceeding on basis that you meant to say 240V from breaker.
Add a comment at any time.

C) Review timer:
5-terminal ET70115 timer has NO and NC terminals
NC is normally closed >> this terminal has power when timer is OFF
NO is normally open >> this terminals has power when timer turns ON
For water heater, you want NO terminal 4 so water heater turns ON when timer turns ON

D) Wire for 240Volt water heater

Two hot wires from breaker connect to terminals 1 and 2. This powers timer clock.
Jumper wire connects between terminal 2 to terminal 3. This sends power to the switch circuit.
Wires to water heater connect to terminals 1 and 4

E) 5-terminal timer turns off 1 hot wire to 240V water heater.
Turning off 1 hot wire will stop 240V circuit from working; Water heater thermostats also turn off one hot wire.
240V water heater has black and red wire.
Wire from terminal 4 should connect to Black wire on water heater.

Diagram shows two wires on terminal 1
Two wires on terminal 2
One jumper wire on terminal 3
One wire on terminal 4
Zero wires on terminal 5


geno_3245_133.jpg

Dec 03, 2010 | Intermatic ET70115C Electronic Energy...

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4 lamp t5 fixture, 1 black wire, 1 white wire, 1 red wire. how do I wire this


Don't forget this is a 240v appliance so it must be fed from a 240v circuit breaker. Once you have a 240v circuit breaker you need to run 12/3 wire with ground from circuit breaker to a box near your fixture. The 12/3 wire with ground will have; 1 black, 1 white, 1 red and a bare ground wire. With the circuit breaker OFF, hook the wires up respectively to the same colors and ground the bare wires togather with a green ground screw in the box. Turn circuit breaker on.

Nov 25, 2010 | Solar Flare Vho T5 4ft 8 Lamp Fluoro Grow...

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My EH40 is not supplying power to the water heater. I hooked the power line in to posts 1 and 2 and I hooked the load out to posts 4 and 6. When I use my power checker it reads no power to posts 3,4,5,...


I have an EH 40 sitting in front of me right now.
http://waterheatertimer.org/How-to-wire-EH40-hot-water-heater-timer.html
The link above shows correct 240V water heater timer wiring for EH40
Link below shows an overview picture of EH 40 connected to 240V water heater
http://waterheatertimer.org/images/EH40-water-heater-circuit-5.jpg
http://waterheatertimer.org/240-v-water-heater-circuit.html


EH40 has a 240V clock.
Terminals 1 and 2 send power to the 240V clock
Power to the clock terminals do not pass through timer to any other terminal

How to wire EH40 for 240V
240V line has 2 hot wires from breaker box.
Lets call these wires Hot1 and Hot2
These wire are interchangeable on 240V circuit
Hot1 connects to terminal 1 with a jumper to terminal 3 (or connect to 3 and jumper to 1)
Hot2 connects to terminal 2 with a jumper to terminal 5 (or connect to 5 and jumper to 2)

240V circuit has 2 wires going to the Load
Let's call these Load1 and Load2
These wires are interchangeable on 240V circuit
Load1 connects to terminal 4
Load2 connects to terminal 6

If the timer is still not working, go back to the breaker and test if it is delivering 240V to the circuit.
If breaker is bad on one leg, then the circuit can test with live power, but the 240V appliance will not work.
240V circuit requires both legs of 240V before circuit is complete.

Oct 24, 2010 | Intermatic EH40 - Electronic Water Heater...

1 Answer

Installed new upper & lower elements & thermostats, only top htr works


If original problem was caused by sediment burning out lower element, did you clean sediment out of water heater when changing lower element?
Two element water heaters are 240V.
Thermostats cut power on one hot wire, but 240V circuit has 2 hot wires. So lower element has power at all times coming from the red wire.
1) Use ordinary tester or multimeter set to 240V <> test each screw of lower element to bare metal part of water heater. Each screw should show 120V. If there is no power, then upper thermostat is defective, screw on upper thermostat is loose, or red wire between upper and lower parts of water heater is bad.
2) Remove wires from lower element. Use continuity tester or multimeter set to ohms <> test across both screws of element to see if power travels through element <> if element is bad, then continuity tester will not light up and multimeter will show no ohms. Put wires back on element after test.
3) Start with cold water in tank. Turn on water heater & upper element will turn on. Put ear on side of tank to hear if upper element is heating water. Test #3 screw to #2 screw on low left side of thermostat, should read 240V > Test #3 screw to #4 screw on low right side of thermostat, should read 0V.
Put ear on side of tank. When upper element turns off: Test #3 screw to #2 screw on low left side of thermostat, should read 0V > Test #3 screw to #4 screw on low right side of thermostat, should read 240V. If this test shows 0V and 0V, then upper thermostat is bad. If reading is correct, immediately move to next test.
http://waterheatertimer.org/images/Thermostats-numbered-divided-500.jpg
4) Turn temp on lower thermostat to 150. Using ordinary tester or multimeter set to 240V <> Test across both screws of lower element. If there is no reading, and you know element is good from step 2, then lower thermostat is bad, or wire is bad between lower element and lower thermostat, or wire is bad between lower thermostat and top part of heater.
5) Test across both lower thermostat screws, should read 240V.If this test is good, it means wires are good. Put jumper wire across both screws of lower thermostat, and test lower element again. If element finally turns on with jumper wire, then lower thermostat is bad.
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http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

If wire is bad between upper and lower parts of water heater, and water heater has tight-fitting 2" foam insulation, it usually indicates water heater replacement.

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1 Answer

What coloured wires go where on the main oven thermostat


If you are speaking of the 240v connection to hook up the oven to the electrical source, then white is the neutral(white to white), black is one of the 240v hot wires(black to black), and red is the other 240v hot wire(red to red).
Finally there is a bare or green color ground wire that goes to the bare or green wire form your source.
normally, the two outside wires on a terminal strip are the hot wires and the middle onif the neutral(white). It does not matter which wire(red or black) goes to what hot terminal at the appliance.
If you are talking about the internal wiring, I can get you a schematic of that.

Mar 13, 2008 | Ovens

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