User manual

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

freezer.

When starting this refrigerator for the very first time, the

cooling cycle may require up to four hours of running

time before the cooling unit is fully operational.

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 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 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 movement of the vehicle will

pass to either side of level, keeping the liquid ammonia

from accumulating in the evaporator tubing.

OPERATION

This refrigerator is designed to work on 120 volt AC.

The refrigerator require a continuous 12 volt DC supply

to operate the control system, the controls will work down

to 9.6 volt DC.

Overall Recess

Refrigerator Dimensions Dimensions

Model

Height Width Depth Height Width Depth

AB CHWD

inch 64-17/64 33-11/16 29-5/8 63-3/16 32-3/4 26-1/16

NDE 1402

mm 1632 855 752 1605 832 662

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

FIG. 11

Side view View from above