Hi
rsg33 Thanks for the pictures, yes I doubt you'll actually see where the refrigerant came out. Considering it comes out under pressure the hole could be seen only under high magnification most likely. It's very interesting to me you found a heater actually marked at 115 volts. Now the new one I put in mine had a package marked 115v, 325w 0173768037 looks kind of similar (except for the 7 on the end) but what was in the package was marked 120v 325w and it did measure 44 ohms , what actual part number it was I didn't pay much attention to.
Looking forward to more pictures and the resistance of that element.
Wow! how did it all go to Hell-oh
How did mfg r and/or Dometic calculate their wattage? Considering all the discrepancies I believe this is a valid question.
Maybe it can be found here
Dometic Heaters at the top of the page,
WATTSdivided byVOLTS=AMPSlets see transpose the equation to be AMPS multiplied by VOLTS = WATTS and see how that works out.
at 2.7 amps and 120 Volts that gives us 324 watts, ah well close enough to 325 to be in tolerance and that way we can ignore the resistance, and every one can be happy except the owners of a failed fridge. The biggest problem by using that equation is it is used for inductive circuits such as electric motors and is useless for determining power being used used in resistive circuits such as heaters.
I can't figure out how they get 41 ohms, 325 watts, 120 volts and 2.7 amps. Would they have a typo on 2 product sheets?
Hi
John Volts X Amps = Power 120 x 2.7 =324 W as close as I can come to it. It's wrong of course but with the nominal parameters given that can be the only explanation.
The RM2663 element with 41 ohms and rated at 325 watts with a nominal current of 2.7 amps will have an actual wattage rating of 299 watts with a fixed current of 2.7 amp or a 351 watt rating with a fixed voltage of 120 volts. So neither the voltage or the current seems to be a factor in their calculations. With quality control like that they must have pretty good lawyers.
If that 41 ohms is right, 10% less is 36.9 ohms.
Yes and that would equate to a 325watt element operating at 115 volts, however what happens if the AC power raises to 125 volts which it can at times in some places. All one has to remember that doubling the voltage or doubling the current will result in four times the power dissipated. So considering that a small increase or decrease still results in a major change of the power.
My element is 43.9 ohms So I'm set there, but I do not have the high temp cut off. Will add in the future.
Right on, I guess we're both at the same stage now, wait for the fix and add the hi temp cut off. I's possible we may have to wait for spring then fire it up to find what the operating temperature is, then add an increase factor to take care of false alarms.
Cheers Willis
