Table Of Contents - Pontiac FIREBIRD 1972 Service Manual

SECTION 1A
CUSTOM AIR CONDITIONING
CONTENTS OF THIS SECTION
..................................................................
Diagnosis 1 A- 1
Leak Detectors
....................................................
1A-1
Testing
..................................................................
1A-3
..............................................
Preliminary Checks 1 A-3
Trouble Diagnosis
................................................
1A-3
Operational Test
........................................
1A- 10
A/C Diagnostic Chart
....................................
1A- 16
................
Low Refrigerant Protection System
1A- 18
Principles of Refrigeration
....................................
1A-20
Operation
............................................................
1A-2 1
Refrigerant
..........................................................
1A-22
..................................
Precautions in Handling 1A-22
........................
Maintaining Chemical Stability 1A-23
General Description
..............................................
1A-23
Temperature Control
........................................
1A-23
Blower Control
..................................................
1A-23
Air Control
........................................................
1A-23
................................
Refrigeration Components 1A-23
Expansion Valve
..............................................
1A-23
Evaporator
........................................................
1A-26
P.O.A. Valve
....................................................
1A-30
Compressor
......................................................
1A-30
............................
Low Refrigerant Protection 1A-36
....................................
Compressor Operation 1 A-39
........................
Compressor Fittings Assembly 1 A-39
Condenser
........................................................
1A-40
Receiver Dehydrator
........................................
1A-40
Heater Components
..........................................
1A-41
Heater Core and Case
......................................
1A-41
Water Control Valve
........................................
1A-41
............................................................
Air Inlet 1A-42
....................................................
Control Panel 1A-42
................................................
Air Distribution 1A-45
..................................................
Functional Test 1 A-45
................................................
Service Procedures 1 A-47
Precautionary Service Measures
........................
1A-47
Depressurizing the System
................................
1A-48
Evacuating the System
......................................
1A-48
..................................
Leak Testing the System 1A-50
..........................................
Charging the System 1A-51
............................................
Adding Refrigerant 1A-54
Checking Oil Level and Adding Oil
................
1A-55
Replacing Refrigeration Components
..............
1A-55
Refrigerant Hose Asms
.....................................
1A-56
....
Service Procedures
.
Compressor Assembly
1A-62
Superheat Shut-Off Switch
................................
1A-85
......................................................
P.O.A. Valve 1A-87
................................................
Expansion Valve 1 A-87
..........................................................
Condenser 1A-87
..........................................
Receiver Dehydrator 1A-92
Evaporator
..........................................................
1A-93
Air Inlet Assembly
............................................
1A-95
A/C Blower Motor and/or Impeller
................
1A-95
Heater Core and Case
......................................
1A-96
......................................
Vacuum Components 1 1 0 2 A-
..........
Temperature Door Cam
;
.......................
1A- 105
........................................
A/C Control Cables 1A-105
Control Panel
..................................................
1A- 108
A/C Electrical Wiring Harness
......................
1A-113
Air Distribution Ducts and Outlets
................
1A-115
LEAK DETECTORS
LEAK DETECTOR J 6084
DIAGNOSIS
LIGHTING J 6084
1
.
Open control valve until slight hiss of gas is heard.
then light gas at opening in chimney
.
Leak detector J 6084 (Fig
.
1A-1) is a gas.operated. torch-
type leak detector using a replaceable cylinder
.
ASSEMBLING J 6084
1
.
Remove dust cap from cylinder
.
2
.
Close valve knob on detector unit
.
WARNING: Do not use lighted detector in any
area where'combustible or explosive gases. dust
or vapors may be present
.
3
.
Thread detector unit onto top of fuel cylinder. finger 2
.
Adjust flame until the desired volume is obtained
.
A
tight
.
pale blue flame approximately 3/8" above the reac-
tion plate is best for detecting leaks (the reaction plate
4
.
Attach search hose to detector unit
.
will be heated to a cherry red)
.