Airstream NTERSTATE

APPLIANCES

I - 3

REFRIGERATOR

WARNING: Most LP gas appliances used in recreational vehicles are

vented to the outside of the vehicle. Check the exterior areas of your unit for

clearance in these areas. Turn all gas operated appliances off when parked close

to a gasoline pump, it is possible that gasoline fumes could enter these types of

appliances and ignite from the burner ﬂame or automatic igniters, CAUSING A

FIRE OR AN EXPLOSION.

Manufacturer:

Dometic Sales Corporation 2320

Industrial Parkway P.O. Box 490

Elkhart, Indiana 46514

Phone: 219-295-5228

Review all Dometic Literature supplied in your Owner’s Packet or stored in the refrig-

erator prior to operating.

In an absorption refrigerant system ammonia is liqueﬁed in the ﬁnned condenser coil

at the top rear of the refrigerator. The liquid ammonia then ﬂows into the evaporator

(inside the freezer section) and is exposed to a circulating ﬂow of hydrogen gas, which

causes the ammonia to evaporate, creating a cold condition in the freezer.

The tubing in the evaporator section is speciﬁcally sloped to provide a continuous

movement of liquid ammonia, ﬂowing downward by gravity, through this section. If the

refrigerator is operated out-of-level when the vehicle is not moving, liquid ammonia

will accumulate in portions of the evaporator tubing. This will slow the circulation of

hydrogen and ammonia gas, or in severe cases, completely block it, resulting in a loss

of cooling.

Any time the vehicle is parked for several hours with the refrigerator operating the

vehicle should be leveled to prevent this loss of cooling. The vehicle needs to be

leveled only so it is comfortable to live in (no noticeable sloping of ﬂoor or walls).

When the vehicle is moving the leveling is not critical, as the rolling and pitching move-

ment of the vehicle will pass to either side of level, keeping the liquid ammonia from

accumulating in the evaporator tubing.

OPERATION

The refrigerator requires 12-volt current to operate even if running on LP or 110 volt

modes. The 12-volt is used to power the circuit board that directs the refrigerator

functions. When running in a mode such as LP, it means the heat source, by far the

largest power requirement; to evaporate the ammonia is being provided by an LP

Gas burner.