Skip to main content ↑ ↓
Topic: Resid refrig (Read 633 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

Resid refrig

Yahoo Message Number: 80099
I am looking at the Samsung mdo RF197ACPN to replace my dometic with. I a have a Xantrex 2000 mod sine wave inverter. Does anyone know if I need to change out the inverter for a pure sine wave or not. I have recd 3 different answers from folks that think they know, yes, no and maybe.
Thanks

Phil B 03 Intrigue 11667

Re: Resid refrig

Reply #1 –
Yahoo Message Number: 80101
NO!

Works just fine on our Xantrex 2000.

Jim 07 Allure #31570

Re: Resid refrig

Reply #2 –
Yahoo Message Number: 80103
Hi Phil

My husband and i just replaced our Norcold with a Samsung FD197...........and YES....we had to replace our inverter. We installed a Magnum pure wave inverter...........we also added another AGM battery to our existing AGM batteries ....we wish we had done it soon...we love how cold everything stays

Dick and Michelle
05 Allure 470

Re: Resid refrig

Reply #3 –
Yahoo Message Number: 80111
Quote
Quote from: michellecbain@...
I would be interested to know why you HAD to replace your inverter. The Samsung refer will run on modified sine wave quite nicely. If the issue was that 2000W was not sufficient then it was not the Samsung but other demands placed on the inverter. The Samsung will draw less current than the Norcold. What special issue made you decide that the 2000W MSW inverter was not up to the task? Lyle Wetherholt
04Intrigue11740

Hi Phil

> My husband and i just replaced our Norcold with a Samsung FD197...........and YES....we had to replace our inverter. We installed a Magnum pure wave inverter...........we also added another AGM battery to our existing AGM batteries ....we wish we had done it soon...we love how cold everything stays >

Dick and Michelle
05 Allure 470

Re: Resid refrig

Reply #5 –
Yahoo Message Number: 80113
Quote
Quote from: mike948@...
Mike?

The Samsung is only one of many potential loads on the inverter so it depends on the sum total of all those loads. Don't forget all the parasitic loads too. Your "fire" question confuses me.
Lyle Wetherholt
04 Intrigue 11740

how long will the Samsung run on the inverter ? > do the fires only start when running on propane? >



> --- In _Country-Coach-Owners@yahoogroups.com_ > (mailto:Country-Coach-Owners@yahoogroups.com) , michellecbain@ wrote: > I would be interested to know why you HAD to replace your inverter. The > Samsung refer will run on modified sine wave quite nicely. If the issue was > that 2000W was not sufficient then it was not the Samsung but other demands > placed on the inverter. The Samsung will draw less current than the > Norcold. What special issue made you decide that the 2000W MSW inverter was not up > to the task?
Lyle Wetherholt
04Intrigue11740
>

> Hi Phil
>
>

> My husband and i just replaced our Norcold with a Samsung > FD197...........and YES....we had to replace our inverter. We installed a Magnum pure > wave inverter...........we also added another AGM battery to our existing AGM > batteries ....we wish we had done it soon...we love how cold everything > stays
>
>

> Dick and Michelle
> 05 Allure 470
>
>
>
>

Re: Resid refrig

Reply #6 –
Yahoo Message Number: 80114
I just installed a new Samsung side by side residential refrigerator (counter depth) in our 08 Allure with no issues with the inverter.

Shawn

08 Allure 420FE

Re: Resid refrig

Reply #7 –
Yahoo Message Number: 80115
I have seen reports of fires starting when on electric.
It is the cooling tubes that corrode and leak that create the flammable conditions.
Bob WEXLER
SOB

Re: Resid refrig

Reply #8 –
Yahoo Message Number: 80120
Phil,

A residential refrigerator has an AC induction motor for the compressor as well as perhaps a shaded pole fan motor. There may also be heating elements involved to avoid sweating of the door seals in hot humid weather and in the ice maker. You'll need to do some research on the specific Samsung model to discover these details. But know this, all of the electronics (whatever they are) in a residential refrigerator are designed to operate on standard 60Hz 120 VAC pure sine wave power. Anything that has a coil (motor windings, transformers and solenoid valves) will respond differently if you change the shape of the voltage/time curve. This is a bit technical but that's the nature of the beast, as it were. There is something called an RMS value (route mean square) which measures the average power dissipated in a resistance by a time varying current. These values are different for pure sine wave, square wave and modified square wave power sources. Some electrical devices are less sensitive to different wave shapes while others like a microwave oven don't work well on anything other than a pure sine wave. Power tools with universal motors do pretty well on square waves (or modified square waves) although their speed controls don't.
Some manufacturer's won't honor a warranty if you don't power their device with pure sine wave power. Whether a device seems to run fine on other power sources isn't really a good measure of how well it is performing and/or how well it will continue to perform over many years. My conservative advice with a residential refrigerator (and any other device designed for household power) is to power it with exactly what it was designed for. That being a pure sine wave. Exceptions might be resistive heating elements. Invertors capable of true household power are more expensive and that's why they are less common.
There are other considerations with inrush current when starting a single phase motor that should be taken into account. Most domestic refrigeration units use a capacitor start and capacitor run or a variation of this on their compressor motor. Your invertor must be able to provide proper power and cope with the inrush current the compressor motor requires to start. The amperage involved will be much greater than the run current. But just for a short time. AC induction motors, their starting mechanisms, power handling requirements and heat dissipation is a very complex subject indeed. Well beyond what's appropriate here.
Less all the technical jargon, it's just best to make sure residential appliances have household power to operate. That means a pure sine wave invertor. I have the Magnum unit which has worked well. Check with them about running a refrigerator off it. I'm sure they will have the technical expertise to advise you properly. Hope this helps.

At 01:45 PM 6/12/2012, you wrote:
 

Re: Resid refrig

Reply #9 –
Yahoo Message Number: 80124
The Samsung RF197ACRS is Energy Star rated and according to the manufacturer will operate satisfactorily on 2000W MSW inverted power. The fridge rectifies the power back to DC to give infinite control of power consumption in all operating aspects. That being said the manufacturer does not recommend the unit for motorhome use even though there are a lot of very satisfied users in RVs out there.

All this information can be found on the Samsung web site.