Operational Test - Pontiac FIREBIRD 1972 Service Manual

1A-10 1972 PONTIAC SERVICE MANUAL
VACUUM
VALVE
-
EN
VACUUA
BLACK
-\
PINK STRIPE
(UPPER DOOR
HEAT SELECT)
\
DEFROSTER DOOR
ORANGE (INSIDE)
O W N (AIR CLOSED)
(LOWER DOOR HEATER SELECT)
Fig. 1A-9 A/C Vacuum Schematic
-
G Series
ENGINE VACUUM SOURCE
BLACK
1
TEMPERATURE MAX. COLD
~ 0 0 ~ ~ MAX. HEAT
SOLID TAN LOWER MODE D O 0
TAN STRIPE UPPER MODE DOOR
DEFROSTER D O
OFF POSITION
OUTSIDE POSITION
AIR INLET DOOR
BLACK OR VENDOR CODED
L
ORANGE (INSIDE AIR)
Fig. 1A-10 A/C Vacuum Schematic
-
A Series
OPERATIONAL TEST
The purpose of performing an operational test (Fig. 1A-
14) is to prove that the air conditioning electrical, air,
vacuum and refrigeration systems are operating properly
and eficiently. Results of the test are as follows:
1. Operation of the air conditioning blower at all four
speeds and engagement of the compressor clutch
would indicate that the electrical circuits are func-
tioning properly.
2. A clear (no bubbles) sight glass would indicate a
properly charged refrigeration system.