Chevrolet 1970 Owner's Manual page 29

Four Season Air Conditioning. System
Temperature (Lower Lever)
The temperature lever allows a
selection of air temperature from
Cold at the far left to Hot at the far
right. When the temperature lever is
in the COLD position the system will
provide the coldest air possible. When
the temperature lever is moved to the
right (toward "HOT"), the system will
operate on outside air regardless of the
position of the upper lever.
Selector (Upper Lever)
This lever provides a selection of
systems available to handle various
heatillg and cooling requirements
throughout the year. The positions
of the Selector lever are separated
into four (4) major operational
groups "Off", "Air Conditioning",
"Vent" and "Heating". The "Air Con-
ditioning" and "Heating" groups have
several positions which improve the
effectiveness of the system for various
demands.
Fan
The fan lever has five (5) positions
from Off at the top to High at. the bot-
tom. When the air conditioning system
is operating, low blower will be main-
26
tained even if the fan switch is moved
to the Of.f position. This is to insure air
flow ' over the cooling coils to prevent
a freeze-up.
Selector Lever Operation
"OFF"-Shuts the entire system off.
"MAX"-Air from the passenger com-
partment is recirculated through the
system and discharged from the upper
outlets when the temperature lever is
in
"Max."
cold. If the "Temperature"
lever is moved
wa~mer,
the system
will automatically go on outside air.
The
"Max"
position is used when
maximum cooling is required under
conditions of high temperature and
humidity.
"NORMAL" -
Outside air is passed
through the system and discharged
through the upper outlets. This posi-
tion is recommended for most air con-
ditioning situations because of re-
duced blower noise and reduction of
cigarette smoke within the vehicle.