Dometic Silhouette S1521, Installation And Operating Instructions Manual

INSTRUCTIONS FOR USE

HOW TO START THE REFRIGERATOR
Leveling

In an absorption refrigerator system, ammonia is liquified

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 am-

monia 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 am-

monia, flowing downward by gravity through this sec-

tion. If the refrigerator is operated when it is not level and

the vehicle is not moving, liquid ammonia will accumu-

late 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.

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 movment of the vehicle will pass

to either side of level - keeping the liquid ammonia from

accumulating in the evaporator tubing.

OPERATION

Before starting the refrigerator, check that all the manual

gas valves are in the ON position. DO NOT forget the

manual shutoff valve on the rear of the refrigerator, see

FIG. 1.

This refrigerator is equipped whith a semi Automatic

Energy Selector (AMES) control system, which can be

set to automatically select either 120 volt AC or LP gas

operation, or if desired Lp gas only. On 3-way models

the control system can manually be set to DC operation.

The refrigerator controls will work down to 9.6 volt DC.

WARNING

Most LP gas appliances used in recreational

vehicles are vented to the outside of the vehicle.

When parked close to a gasoline pump, it is pos-

sible that gasoline fumes could enter this type of

appliance and ignite the burner flame, CAUSING

A FlRE OR AN EXPLOSION.

FOR YOUR SAFETY, it is recommended that all LP

gas appliances which are vented to the outside

should be shut off when refueling.