Cooling Unit; Leveling; Ventilation - Dometic RM2351 Diagnostic Service Manual

SectIon 8 coolIng unIt

8.1 leveling

Leveling is one of the requirements for proper operation
of absorption refrigerators. The absorption design utilizes
no mechanical pumps or compressors to circulate the re-
frigerant within the system, so proper leveling must be
maintained to provide the correct refrigerant flow. With-
out proper leveling, refrigerant within the cooling unit will
collect and stagnate at certain areas. Without proper re-
frigerant flow, the cooling process will stop. Absorption
refrigerators have a type of cooling unit that utilizes an en-
closed pump tube surrounded by a solution to protect the
assembly. To ensure proper leveling, the vehicle needs
to be leveled so it is comfortable to live in. (No noticeable
sloping of floor or walls). When the vehicle is moving, lev-
eling is not critical as the rolling and pitching movement
of the vehicle will pass to either side of level, keeping the
refrigerant from accumulating in the piping
Perfectly leVel not reQuIred
more leVel = Better oPeratIon

8.2 Ventilation

The installation shall be made in such a manner as to
separate the combustion system from the living space of
the mobile home or recreational vehicle. Openings for air
supply or for venting of combustion products shall have a
minimum dimension of not less than 1/4 inch. Ventilation
is a critical requirement for proper cooling unit operation.
The coach vent system must be able to provide a way to
direct the hot air, produced by the action of the cooling
unit, out away from the installation of the refrigerator. The
refrigerator extracts heat from the interior of the refrigera-
tor cabinet and dissipates the heat out through the vent
system. In a proper installation there should be zero (0")
clearance surrounding the sides and top of the refrigera-
tor to achieve proper air flow. Clearance from the back of
the refer to the outside wall must be kept less than 1 inch.
All potential dead air pockets should be blocked or baffled
to ensure that heat won't be trapped in these spaces and
reduce efficiency.
note: Refrigerators should be installed in accordance
with appropriate installation instructions received with the
refrigerator.
for more uPdated InformatIon on unIQue
VentIlatIon reQuIrementS, refer to Vent Installa-
tion Instructions, Form No. 3308666.XXX.
typical roof Vent and Side Wall Vent
Baffle
typical two Side Wall Vents
21
turnIng
Vane
Baffle