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WARNING: NEVER TOW THE TRAILER UNLESS THE ROOF IS LOWERED.
Refrigerators
Dometic 2-Way Refrigerator
A manual pertaining to the refrigerator is included in the documentation given to you at the
dealership. Please read and follow all care, maintenance, and safety information contained
in this manual. Store the manual in a safe place for future reference. Pass the manual on to
any subsequent users of the refrigerator.
IMPORTANT: It is strongly recommended that you read the supplied manufacturer’s owner
manual when purchasing trailer.
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 trailer 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 trailer is parked for several hours
with the refrigerator operating the trailer should be levelled to prevent this loss of cooling. The
trailer needs to be levelled only so it is comfortable to live in (no noticeable sloping of the floor
or walls).
When moving, levelling the trailer is less critical. Rolling and pitching the trailer back and forth
across the level will prevent ammonia from accumulating in the tube evaporator, thus avoiding
blocking the system.
OPERATION
The refrigerator requires 12-volt current to operate even if running on LPG or 120-volt modes.
The 12 volt is used to power the circuit board that directs the refrigerator functions. When
running in a mode such as LPG, it means the heat source, by far the largest power requirement
to evaporate the ammonia is being provided by an LP Gas burner.
WARNING: MOST
LP
GAS
APPLIANCES
USED
IN
TRAILERS
ARE
VENTED
TO
THE
OUTSIDE
OF
THE
TRAILER.
WHEN
PARKED
CLOSE
TO
A
GASOLINE
PUMP,
IT
IS
POSSIBLE
THAT
GASOLINE
FUMES
COULD
ENTER
THIS
TYPE
OF
APPLIANCE
AND
IGNITE
THE
BURNER
FLAME,
CAUSING
A
FIRE
OR
AN
EXPLOSION.
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