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refrigerator overview
purging air from the lines
If the refrigerator has not been used for a long time - or -
the LP tanks have just been relled, air may be trapped in the
supply lines. To purge the air from the lines, turn the refrigera-
tor off and on by pressing the ON/OFF button. If the ame is
not lit within 45 seconds, turn the refrigerator off and back on
again. This procedure can be repeated 3 to 4 times. If repeated
attempts fail to start the LP gas operation, check to make sure
that the LP gas supply tanks are not empty and that all manual
shutoff valves in the lines are open.
automatic cooling unit
cycling system and low
ambient control
The refrigerator has been design with an automatic cooling
unit cycling system that helps reduce frost build up in the fresh
food compartment. The rst automatic frost reduction cooling
unit cycle begins 60 hours after turning “on” the refrigerator
(for best operational results the refrigerator should be turned on
anytime between 4 and 10 PM), and will last for approximately
120 minutes. Thereafter, the cycle will automatically repeat
every 48 hours as long as the refrigerator continues to run.
The automatic Low Ambient Control (LAC) ensures trouble-
free operation in low ambient temperatures (e.g below 50° F).
auto mode / gas mode
The refrigerator is equipped with a control system where the
user can choose to turn the AUTO mode on or off.
auto mode is turned on
The system is fully automatic which means that it selects the
most suitable energy source available, either 120V AC or LP
gas operation.
The gas operation will automatically be locked out for a period
of 15 minutes when the engine is switched off. This will pre-
vent gas operation e.g. when stopping at a refueling station.
auto mode is turned off (gas mode)
The system operates on LP gas only. The control system
activates the ignition system and makes one attempt to light
the burner.
Consequently,
when parking close to a gasoline pump all LP gas appliances
vented to the outside of the vehicle must be turned off. Other-
wise gasoline fumes from gasoline pumps might enter LP gas
appliance and these can then ignite from the burner ame and
cause a re or an explosion.
absorption cooling system
In an absorption refrigerator system, ammonia is liqueed in the
nned condenser coil at the top rear of the refrigerator. The liq-
uid ammonia then ows into the evaporator (inside the freezer
section) and is exposed to a circulating ow of hydrogen gas,
which causes the ammonia to evaporate, creating a cold condi-
tion in the freezer.
The tubing in the evaporator section is specically sloped to
provide a continuous movement of liquid ammonia, owing
downward by gravity through this section.
Sodium chromate is used for corrosion protection (less than
2 weight % of the coolant).
leveling the refrigerator
Leveling is one of the requirements for proper operation with
absorption refrigerators. To ensure proper leveling the vehicle
needs to be leveled only so it is comfortable to live in (no notice-
able sloping of oor or walls).
Any time the vehicle is parked for several hours with the refrig-
erator operating, the vehicle should be leveled to prevent this loss
of cooling.
If the refrigerator is operated when it is not level and the vehicle
is not moving, liquid ammonia will accumulate in sections 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.
When the vehicle is moving, the leveling is not critical, as the
rolling and pitching movement of the vehicle will pass to either
side of level, keeping the liquid ammonia from accumulating in
the evaporator tubing.
when the refrigerator is not in use
Any absorption refrigerator that is to be taken out of service for
an extended period of time should be turned off.
WARNING
6
!
CAUTION
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CAUTION
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