Chevrolet 70 1969 Series, Shop Manual

Page: 84 / 913

CAB A N D BODY M O U N TIN G S 1-57
OPERATING INSTRUCTIONS
(Refer to Figures 2 and 3)
N O T E : For rapid cool-down, place blower con­
trol switch lever to "HIG H - SPEED " position.
Also open windows for a minute or two to expel
warm air from cab.
2. After desired temperature in cab is obtained,
move "A IR " lever to "NORM AL"position, which
will generally provide an ideal mixture of both
recirculated air and outside air for maximum
comfort.
3. If desired, the "T E M P , lever can also be moved
to any degree towards the " H O T " position, to
provide maximum comfort by cooling, dehumid-
ifying, then re-heating the air flowing through
the system.
N O T E : For heating only, leave "A IR C O N D ,”
lever in " O F F " position and move "A IR " lever to
" O U T S ID E ," then operate system as described
on following page.
”
n o t e
“ *
The air flow direction from any one
of the dash outlets can be controlled by
positioning of outlet inner deflector. The
inner deflector can also be oscillated to
completely close the outlet if desired. To
close off any one of the outlets will in­
crease the flow from remaining open out­
lets. The small outlet door at base of dis­
tributor duct can be opened if desired by
pulling downward on door tab.
N O T E : Before starting truck engine, make
sure "A IR C O N D ." lever is in " O F F " position to
lessen the load on battery during starting.
1. With engine running:
•Place "A IR C O N D ." control lever to " O N ."
N O T E : Blower motor will automatically operate
at low speed.
•Place "A I R " control lever to " A / C . "
•Select blower speed.
Figure 2 — Air Conditioning Control Switch
CHEVROLET SERIES 70 -80 H EAVY DUTY TRUCK SH O P M A N U A 1