Dometic RM2551 Manuel d'utilisateur télécharger pdf (Page 8)

ELECTRICAL CONNECTION

120 Volts AC Connection

The refrigerator is equipped with a three-prong (ground-

ing) plug for your protection against shock hazards and

should be plugged directly into a properly grounded

three-prong receptacle. DO NOT cut or remove the

grounding prong from this plug. The free length of the

cord is 2 feet and therefore recommended that the re-

ceptacle be located to the left side of the refrigerator

(viewed from the rear) and approximately 6 inches from

the floor (see FIG. 11). This allows easy access through

the vent door. The cord should be routed to avoid direct

contact with the burner cover, flue cover or any other

components that could damage the cord insulation.

12 Volts DC Connection

This refrigerator model is not designed for 12 volt DC

operation of the cooling system; however, 12 volt DC

must be supplied to the refrigerator to operate the con-

trols. Use a minimum of 14 gauge wire between the

battery and refrigerator to supply the control voltage.

The connection is made to the positive (+) and negative

(-) terminals of the terminal block on back of the refrig-

erator. (See FIG. 1). Correct polarity must be observed

when connecting to the DC supply.

DO NOT use the chassis or vehicle frame as one of the

conductors. Connect two wires at the refrigerator and

route to the DC supply.

The distance the current must travel from the battery to

the refrigerator dictates the AWG wire size to be used.

Should the wire be too small for the distance, a voltage

drop will result.

The connections must be clean, tight and free from cor-

rosion.

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

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 a control system, which

can be set to automatically select either 120 Volt AC or

LP gas operation (AUTO mode), or if desired LP gas

only (GAS mode).

In both AUTO mode and GAS mode operation, the tem-

perature is controlled by a factory preset temperature

setting.

The refrigerator controls will work down to 9.6 volt DC.

6

120 Volt AC

receptacle

FIG. 11

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.

! WARNING

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

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Dometic RM2551 Manuel d'utilisateur Page 8

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