6
Using the refrigerator
The refrigerator is silent in operation.
When the appliance is first put into operation, there may be a mild odour which will
disappear after a few hours. Ensure the living area is well ventilated.
The freezer compartment should be cold about one hour after switching on the
refrigerator.
The refrigerator will take several hours to reach its operating temperature.
Importance of levelling the refrigerator
In an absorption refrigerator system, ammonia is liquefied in the finned condenser coil
at the top 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 downward by gravity through this section. If the refrigerator is ope-
rated 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. Remember to level the vehicle when stopping for more than an hour, otherwise
the cooling unit could be permanently damaged due to overheating if it is left ON".When
the vehicle is moving, the leveling is not critical as the rolling and pitching motion of the
vehicle will pass to either side of level, keeping the liquid ammonia from accumulating in
the evaporator tubing.
Controls
The gas and electric controls are located at the rear of the refrigerator and are accessi
ble through the lower vent in the outside wall of the vehicle. See FIG. 8.
5.2
5.2.1
5.2.2
CONTROLS FOR
RM 2191
CONTROLS FOR
RM 2193
G
FIG. 1
A = DC ON/OFF SWITCH
B = GAS ON/OFF SAFETY VALVE
C = PIEZO IGNITOR
D = ELECTRIC THERMOSTAT
E = AC ON/OFF SWITCH
F = GAS INLET FITTING
G = DC TERMINAL BLOCK
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