Chevrolet 1980 Light Duty Truck Service Manual page 53

S E L E C T O R
L E V E R C O M P R E S S O R
P O S IT IO N
O F F OFF
ON
M A X A /C
ON
N O R M A /C
ON
B I- L E V E L
OFF
V E N T
H T R OFF
ON
D E F
N O T E % 1 00 % Inside air is n o t available, some bleed throu gh o f outside air is a llo w ed.
c. Obtain treatment as soon as possible, from a doctor
or eye specialist.
Should liquid R-12 come into contact with the skin, the
injury should be treated the same as (skin which has been
frostbitten or frozen.
All Refrigerant-12 drums are shipped with a heavy
metal screw cap. The purpose of the cap is to protect the
valve and safety plug from damage. It is good practice to
replace the cap after each use of the drum for the same
reason.
SYSTEM OPERATION - CK TRUCK
B L O W E R
A IR
S P E E D S
S O U R C E
A V A I L
LOW OUTSIDE
HI INSID E%
A L L OUTSIDE
A L L OUTSIDE
OUTSIDE
A L L
A L L
OUTSIDE
OUTSIDE
A L L
Fig. 1 B-6~System O peration - CK T ruck
Fig. 1B-7--Air C o nd ition in g V acuum S chem atic - CK Truck
AIR C O N D ITIO N IN G
A IR
H E A T E R
E N T E R S
V E H IC L E
FLOOR O UTLETS
DASH O UTLETS
DASH O UTLETS
FLOOR AND
DASH O UTLETS
DASH O UTLETS
FLOOR O UTLETS
DEFROST O UTLETS
If it is necessary to transport or carry any container of
Refrigerant-12 in a car, keep it in the luggage compartment.
If the drum is exposed to the radiant heat of the sun, the
resultant increase in pressure may cause the safety plug to
release or the drum to burst.
Welding or steam cleaning near any of the refrigerant
lines or components of the air conditioning system could
build up dangerous and damaging pressures in the system.
If the occasion arises to fill a small Refrigerant-12
drum from a large one, never fill the drum completely.
Space should always be allowed above the liquid for
1 B-7
A /C H E A T E R
D O O R - D E F R O S T E R
O P E N T O :
D O O R - O P E N TO :
HEATER
HEATER
HEATER
A/C
HEATER
A/C
A/C &
HEATER
HEATER
A/C HEATER
HEATER HEATER
HEATER DEFROST
LIGHT TRU CK S E R V IC E MANUAL