Pages 31–58 (28 pages)

Circ-L-Aire: Description and Operation

From the 1959 Pontiac Heating, Ventilation and Air Conditioning Manual

How Pontiac's Circ-L-Aire conditioner works. It combines the air conditioner with the heater and a shared blower, can draw outside or recirculated inside air, and is controlled by push buttons and levers. The section describes the compressor, condenser, receiver and liquid indicator, thermostatic expansion valve, evaporator and temperature regulation (hot gas by-pass) valve, then the refrigeration circuit and the air, vacuum and electrical systems.

Read this section free, starting at page 31

What this section covers

  • Outlets, push buttons and operating instructions
  • Compressor
  • Condenser and receiver with liquid indicator
  • Thermostatic expansion valve
  • Evaporator
  • Temperature regulation (hot gas by-pass) valve
  • Vacuum system
  • Electrical system and blower circuits
Year
1959
Make
Pontiac
Vehicle
Components and Systems, Heating and Air Conditioning, Passenger Cars
Type
Service Manual
Models
1959 Pontiac: heater, ventilation, Circ-L-Aire and Cool Pack air conditioning
Pages
141

What’s inside

Heater and ventilation

  1. Heatingpp. 2–16
  2. Heater Testing and DiagnosisAn operational test for the heater with preliminary engine compartment and interior checks, followed by a complaint and remedy table for insufficient heating, poor defrosting and vacuum system faults.pp. 17–19
  3. Heater SpecificationsHeater blower switch current and rpm figures for Lo, Hi and De-Ice, cooling system capacity with and without heater, and fuse ratings.pp. 20–20
  4. VentilationHow outside air enters the cowl chamber and side shroud ventilators, with adjustment of the shroud side duct vent control cable and replacement of the top ventilator grille, its sealing strip, and the side duct outlet and door.pp. 21–23

Basic air conditioning

  1. Principles of RefrigerationThe physics behind automotive air conditioning, the five parts of a simple refrigeration system (compressor, condenser, receiver, expansion valve and evaporator), and a Freon-12 pressure-temperature table.pp. 24–25
  2. General Information on Refrigeration Servicepp. 26–30

Circ-L-Aire conditioning

  1. Circ-L-Aire: Description and Operationpp. 31–58
  2. Circ-L-Aire: Inspection and Periodic Servicepp. 59–62
  3. Circ-L-Aire: Mechanical Repairspp. 63–66
  4. Circ-L-Aire: Refrigeration Repairspp. 67–82
  5. Circ-L-Aire: Testing and Diagnosispp. 83–91
  6. Circ-L-Aire: SpecificationsBlower switch current and rpm table, Frigidaire compressor data, belt size and tension, clearances, Freon capacity, generator and regulator figures, and torque values for the Circ-L-Aire system.pp. 92–93

Cool Pack conditioning

  1. Cool Pack: Description and Operationpp. 94–108
  2. Cool Pack: Inspection and Periodic ServiceNew car pre-delivery inspection, 2,000 mile inspection, periodic service and on-car adjustments for the Cool Pack conditioner.pp. 109–111
  3. Cool Pack: Mechanical RepairsReplacement of the master relay, blower switch, temperature control switch, blower assembly and air outlets, and removing the compressor to service the engine.pp. 112–113
  4. Cool Pack: Refrigeration Repairspp. 114–128
  5. Cool Pack: Testing and Diagnosispp. 129–137
  6. Cool Pack: SpecificationsBlower switch current and rpm table, Frigidaire compressor data, belt tension, clearances, Freon capacity of 3.5 lbs., fuse ratings and torque values for Cool Pack.pp. 138–139

Index

  1. IndexAlphabetical index of subjects in the manual, with page numbers for heating, ventilation and both air conditioning systems.pp. 140–141

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