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24-2
AIR CONDITIONING
HIGH
DISCHARGE
PRESSURE
(b)
Air in system.
(a) Too much refrigerant.
(c) Dirty condenser.
(d)
High ambient temperature.
(a) Purge system for
10
seconds.
(b)
Purge system for
1 0
seconds.
(c)
Clean condenser, remove bug screens.
(d)
NOTE: Discharge and Suction pressures will
vary with ambient temperature and heat
load
applied to the evaporator. Normal suction
pressure will vary between
25
to
40
psi. Nor-
mal discharge pressure at
1200
engine rpm
as
indicated below:
Ambient
Temperature
60°F
8OoF
1 O O O F
1 1 0 ° F
Discharge
Pressure
100-1
50 psi
140-190
psi
190-240
psi
230-280
psi
HIGH SUCTION
(a) Moisture in system.
(a)
Change strainer-di .-r-recharge.
PRESSURE
(b)
Expansion valve frozen or stuck open.
(c)
Expansion valve equalizer tube plugged.
(d) Bad compressor valves.
(e) Not enough oil.
(b) Change strainer-drier-recharge,
clean or re-
(c)
Clean or replace expansion valve.
(d)
Replace valve plates.
(e) Add oil.
place expansion valve.
OPERATION
Models AR-1, AR-2
A simple and versatile control system provides the
driver with a wide choice of comfort conditions. Four
push-buttons marked "Off
,"
"Heat," "Defrost," and
"Cool" (Fig. 1) control vacuum actuators which posi-
tion the outlet dampers for correct air distribution.
The temperature control lever adjusts the setting of a
pair of thermostatic valves, which maintains the tem-
perature of the vehicle at a comfortable level in heat,
defrost, and cool. Rotary blower switch has four posi-
PUSH BUTTONS
"OFF"
-
to shut off system
"HEAT"
-
to
be used when heating the car
"DEFROST"
-
to be
used when defrosting the windshield
"
COOL"-to
be
used when cooling the car.
TEMPERATURE CONTROL LEVER
Marked "WARM"
it
maintains the temperature
of
your
cor
at any desired level
like
the thermostat
in
your home
The
TEMPERATURE CONTROL LEVER can
be
used with air
conditioning, heating, and defrosting
With the lever in the
up
position, the air is not heated
Moving
the
lever downward increases the air temperature
With the lever in the down position. maximum heating
of
the air occurs
62
x
668A
Fig.
!-Push
Button and Temperature Control
Lever ITypicalJ
BLOWER
SWITCH
Blower,
it
selects the amount and type
of
air flowing in
the car during
air
conditioning, heating.
or
defrosling
Four
switch positions
are
available as indicated by
the
white indea
marks
f
Maximum Speed-recirculated a i
r ,
m
Medium Speed-recirculated
air
'
4
Medium Speed-fresh air/
Law S p e e d - f r e s h a i r
Fig.
2-Blower
Switch ITypicalJ
tions as indicated by the white index marks (Fig. 2).
These provide:
(1)
Low
speed-fresh air heating, defrosting, or
-
Adj u st-abl e
Vanes
(manually controlled)
I \
/
Adjudablt vanes
ir
from
the
spa,
outlets can
be
directed
from
side
to
side
ond
up
or down by adjurtinq the vanes
Air
outlets allow air to
be
directed
at the car occupants during cool
down and away from the occupants
after comfort has been achieved
62x6m
or rotating the barrel.
Fig.
3-Directional
Outlets flypica/)
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