Buick LeSabre 1965 Service Manual page 839

1 1 - 1 0 6 OPTIONAL HEATER-AIR CONDITIONER SYSTEM ACCESSORIES
TEST CONDITIONS 45000, 46000 and 48000 Series
1. Car doors and hood open.
2. Climate control switch set at RECIR. and FAN lever full HI.
3. WARMER and DEFROST levers in off (fully left) position. Vent knobs off.
4. All air conditioner outlets open.
5. Gauge set connected to Schrader valve fittings as shown in figure 11-153.
6. Test should be conducted in area with above 70 F. ambient temperature.
7. Ambient air temperature should be measured in immediate test area toward front of car.
8. A fan should be used in front of radiator grille to insure minimum differential between temperature
of air passing over condenser through radiator grille and evaporator through body cowl screen.
TEST NO. 1
Set engine speed at 2,000 rpm.
The following table lists ambient temperature, evaporator and compressor head pressures, and right and
left air outlet temperatures that can be expected from a normally functioning unit.
NOTE: If evaporator pressure is not correct for indicated ambient temperature, adjust suction throttle valve
following procedure in par. 11-15, sub-par. "f".
NOTE: The lower outlet temperature can be achieved on dry days, and the higher on humid days.
Ambient
Temperature
(°F)
70
80
90
100
110
TEST NO. 2:
Evaporator Pressure
at Suction Throttling Valve
(PSIG)
28-30
28-30
28-30
28-30
28-31
Compressor Head
Pressure
( PSIG)
160-195
180-235
200-280
230-310
270-335
Left Outlet
Temperature
(°F)
38-41
40-43
40-45
42-47
44-52
Right Outlet
Temperature
(°F)
39-43
40-45
40-45
42-48
46-53
This should be run on cars which will pass Test No. 1, but do not perform satisfactorily on the road. In
this test the engine speed should be adjusted to the ambient temperature and humidity.
Ambient Evaporator Press Compressor Head Left Outlet Right Outlet
Temperature Relative Engine
a
t Suction Throttling Valve Pressure Temperature Temperature
(°F) Humidity R.P.M. (PSIG) (PSIG) (°F) (°F)
70
70
80
80
90
90
100
100
110
110
Dry
Humid
Dry
Humid
Dry
Humid
Dry
Humid
Dry
Humid
410-435
450-475
400-435
690-715
415-440
765-790
620-670
950-1000
775-825
1225-1275
28
35
31
35
35
35
35
35
35
35
120
148
156
200
178
225
225
267
260
317
40
46
44
50
47
51
48
54
50
55
40
47
44
50
47
54
48
56
50
56
The pressures and outlet temperature should be equal to or lower than those tabulated above.
Figure 11-154—Air Conditioner Functional Test - 45000, 46000 and 48000 Series