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2-Way and 3-Way RefrigeratorsĪ 3-way refrigerator usually refers to an absorption refrigerator (meaning it does not have a compressor) that can run off of AC, DC, or propane power.

They are, however, more dependant on a consistent source of electricity, and therefore better suited for those who stay mostly at developed RV sites. This is usually an Alternating Current (AC) source, though it could be supplied by a Direct Current (DC) if your RV is equipped with an inverter.Ĭompressor refrigerators tend to cool faster and efficiently and are not affected by altitude. To accomplish this, however, the compressor refrigerator needs a constant source of power. While the general process of cooling in a compressor refrigerator is mostly the same as in an absorption refrigerator, the critical difference is that the former has a compressor that moves the ammonia liquid from the condenser fins to the evaporator coils via hydraulic pressure instead of by gravity. The more uneven the fridge is, the less efficiently the ammonia liquid will travel, not only decreasing the fridge’s ability to cool food, but also causing damage to the unit over time.įor a more detailed description of how an absorption refrigerator works, read my article Decoding Your RV Fridge – How It Works Compressor Refrigerators The fridge needs to be level so that the ammonia liquid falls from the condenser fins at the top of the refrigerator to the evaporator coils at the bottom. It’s step 4 that makes it critical that an absorption refrigerator is level.

The ammonia vapor flows into an absorber which releases the heat and turns the ammonia back into a liquid.

The ammonia liquid, in turn, is heated to gas. The heat from inside the fridge box is transferred to the liquid ammonia in the evaporator coils, leaving the storage section cool.

The evaporator coils pass near the fridge box.

The ammonia liquid falls (via gravity) to the evaporator coils in the refrigerator’s cooling unit.

In the fins, heat is allowed to escape from the ammonia vapor, which cools into ammonia liquid.

The ammonia vapor rises to the condenser fins at the top of the refrigerator.

The refrigerators boiler (heated by propane or electric heat) turns the liquid ammonia into a gas.

When you are on the move or staying at a campsite off the grid youĬan use propane instead, increasing the mobility of your RV.Īn absorption refrigerator uses ammonia, water, and hydrogen gas to create a cooling effect. Power grid and run your appliances as you would in a standard home. You are parked at a developed RV campsite, you can plug into the Generally, the types of recreational vehicle refrigerators areĪbsorption refrigerator because it can use propane or AC power. It’s important to know what style your RV fridge is because each type works differently and the best practices for using each change drastically between types. In order to know the best practices, you need to know what type of fridge you have and how it works.ĭepending on your RV manufacturer the terms used to describe the type of refrigerator in your recreational vehicle may vary. Of course, there are different types of RV fridges, and each has its own advantages and disadvantages. This damage may not be immediate but will cause significant wear and tear over time.

Running the fridge on an unlevel surface for more than half an hour can damage the refrigerator. Why does your RV fridge need to be level? Your RV fridge is most likely an absorption refrigerator which relies on gravity for the ammonia liquid to fall from the condenser fins to the evaporator coils where the cooling process takes place. Relatively level in order to work properly. That require constant monitoring and consideration when in a Things that are taken for granted in a stationary home may be issues

This mobility, however, does come without its own considerations. Comforts of home with the freedom to not be tied to one location.