Please i need help with 240v wiring to heater

therte is no neutral wire when wiring 240v ( 2 black 1 ground usually)

it could be the element is slightly loose in the unit and causing a mechanical vibration or if its at the control this could also cause a mechanical resonant vibration

12000 btu's per 500 square feet is a good rule of thumb

i have the answer, did you solved it yet???

http://www.marleymep.com/en/fahrenheat/products/baseboard-heaters/electric/f2500-series.aspx
on the bottom is a pdf for wiring

i dont have a diagram but i just did mine,,,its real easy to do...write back if you didnt solve your answer yet...

check on the wiring diagram. You may be looking at 2-15 amp or 2-20 amp breakers.

your walls are trying to burn good thing you cannot turn it down it can kill you.

a 750 watt heater at 240 volts draws 3.15 amps so a 2 pole 15 breaker with 14/2 wire would be fine

if the heater is 120 volt or 240 volt its really pretty easy. at either end is a cover. remove the cover and you'll see a wirenut or maybe just two wires. one side has an integral thermostat. connect your supply to the two wires on the thermostat. connect the other end in your breaker box with the appropriate sized circuit breaker. wire size feeding it will depend on its current draw. how many watts is the heater? 1500 watts will draw 6.25 amps at 240 volts so you can use 14 ga wire. 2000 watts will draw 8.3 at 240 volts - so 14 ga is still ok. 2500 watts at 240 draws 10.41 amps. 3000 watts draws 12.5 amps at this stage I'd use 12 gauge on a 20 amp breaker.