Dometic NDR1292-S, Installation And Operating Instructions Manual

FIG. 11

Side view

V i e w   f r o m   a b o v e

This method of installation and these clearances will give you adequate space for service and proper installation

OPERATING

INSTRUCTIONS

IMPORTANCE OF LEVELING A
REFRIGERATOR

In an absorption refrigerator system, ammonia is lique-

fied 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
f r e e z e r .
The tubing in the evaporator section is 

 sloped

to provide a continuous movement of liquid ammonia,
flowing downward by gravity through this section. If the
refrigerator is operated when it is not level and the ve-
hicle is not moving, liquid ammonia will accumulate in
sections of the evaporator tubing. This will slow the cir-

culation 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 

 to live 

 (no noticeable

sloping of floor or walls).

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.

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 with an Automatic Energy

Selector (AES) control system, which can automatically

select the most suitable energy source which is avail-
able, either 120 Volt AC, or LP gas operation. The sys-
tem can be set by the user to be fully automatic, or if
desired, LP gas only. The refrigerator controls will work
down to 9.6 volt DC.

Most LP gas appliances used in recreational ve-

hicles are vented to the outside of the vehicle.

When parked close to a gasoline pump, it is pos-
sible that the gasoline fumes could enter this
type of appliance and ignite from the burner
flame, CAUSING A FIRE OR AN EXPLOSION.

FOR YOUR SAFETY, when refueling, shut off all
LP gas appliances which are vented to the out-
side.