Hudson 1955 Rambler, Technical & Service Manual

Page: 257 / 292

ALL SEASON AIR CONDITIONING SYSTEM 7
located under the left side of the instrument
panel controls the air recirculation damper.
AIR FLOW
Air Conditioning
"Hornet" and "Wasp" Series
The air conditioning switch is placed in the
extreme left or "Low" position for the water
valve control, and turned counterclockwise to
either the "Low" or "High" position to start
normal air conditioning.
The damper control is placed in the Air
Condition. ing position. This puts the dampers
in their correct position to route the air flow
properly.
The cowl vent damper is closed, with a
modified opening to admit approximately 30 per
cent fresh air by car interior volume. The
defroster dampers close the openings in the
sides of the evaporator side plates. The inlet
damper (which is actually two dampers, one
spring loaded, the other operated by the lever
arm) is closed to the evaporator housing opening
and open to the dash inlet opening.
The reduced amount of fresh air passes over a
baffle or rain shedder to prevent moisture from
entering. Then through the filter which removes
dust and foreign matter. The fresh ram air
passes through the heater core and into the
heater hopper box. The blower motor draws the
air from the heater hopper box and directs it
through the blower motor opening to the evapo-
rator core. The defroster dampers are closed to
the openings in the evaporator core side plates.
Thus the air has a free unobstructed course to
the evaporator core. The air flows through the
evaporator core, is cooled and delivered di-
rectly to the ducts, and two air discharge doors
on the instrument panel which may be opened to
the desired position (Fig. 6).
FIGURE 6— Air Discharge Grille Door
"Hornet" and "Wasp" Series
The air discharge doors may be adjusted
independently, directing air flow where desired.
The partially open position provides maximum
front seat cooling. The low position will direct
the cool air toward the lap area of the front
seat passengers. This position may be used when
only these passengers are in the car or when
driving into the hot sun. "Full open" position
is best suited for over-all front and rear
cooling.
The sun visors may also be used to control the
distribution of the air. With the sun visors
"up", air can be circulated more readily toward
the rear. Tilting the visors down will direct
the air toward the front seat area. When using
the visors for control of the air flow, the
large air doors must be in the "full open"
position.
The "full open" position will direct the cool
air upward and natural circulation takes place;
the air moves along the top of the car from
front to rear and returns under and around the
seats. Warm air is displaced and carried around
and under the seats during this time and drawn
into the recirulation air duct. With the dash
inlet damper open, the blower draws this air
into the heater hopper box. The recirculated air
is intermixed, by the blower, with fresh air
from the cowl vent and directs the air through
the evaporator core where it is again cooled and
delivered to the car interior (Fig. 7).
FIGURE 7— Air Conditioning Air Flow
"Rambler" Series
The combination switch and water valve control
knob is placed in the extreme left "Low"
position. The knob is turned counterclockwise
to start the air conditioning system.
The left damper control knob is pushed in to
open the air recirculating damper.
The right damper. control knob is pulled out to
close the cowl vent damper and the evaporator
shroud air outlet door.
The air discharge doors are open to the
desired position.
The blower fan draws air from the car interior
for recirculation through the air recirculation
duct located on the left side of the dash panel.
The closed cowl vent damper prevents outside air
from entering and passing directly through the
heater and evaporator cores.
A reduced amount of fresh outside air is mixed
with the air from the car interior by means of
an opening cut in the left side of the cowl
ventilator air intake chamber. The opening is