1977 B Series Heater Control; 1977 F Series Heater Control - Pontiac TRANS AM 1977 Service Manual

HEATING AND VENTILATION 1A-3
--
THIS POSITION ALLOWS OUTSIDE
POSITION OF THIS SYSTEM SELECTOR
AIR FLOW TO FLOOR OUTLET.
LEVER DETERMINES AIR FLOW FROM
(ADDITIONAL VENTED AIR CAN
FLOOR, INSTRUMENT PANEL OR
BE DISTRIBUTED INSIDE CAR BY
WINDSHIELD OUTLETS-IN "HEATER,"
OPERATING CENTER UPPER I/P, FLOW IS ABOUT 80% TO FLOOR &
LEFT SIDE, OR RIGHT SIDE 20% TO WINDSHIELD OUTLETS
VENT KNOBS.) \ "
I
L L V L ~ 1 0 I W I V V L U
TO "OFF" AS LONG
AS IGNITION IS IN
/
TEMPERATURE LEVER POSITION THIS POSITION ALLOWS
"RUN" POSITION. WILL REGULATE OUTLET AIR ABOUT 80% AIR FLOW
TEMPERATURE BY BLENDING THE
TO WINDSHIELD AND
INCOMING OUTSIDE AIR THRUI
20% TO F LOOR.
AROUND THE HEATER CORE.
4240
FIG. 1A-2 1977 B SERIES HEATER CONTROL
.
POSITION OF THlS SYSTEM
SELECTOR LEVER DETERMINES
AIR FLOW FROM FLOOR, WISHLD.
OR, AS IN THIS "OFF" POSITION, THIS POSITION ALLOWS
-
THIS POSITION ALLOWS
ALLOWS OUTSIDE AIR ENTRY ABOUT 80% AIR FLOW ABOUT 80% AIR FLOW
UNDER THE INST. PANEL THRU
TO FLOOR & 20%
TO WINDSHIELD & 20%
A PURGE OPENING AT RIGHT SIDE
TO FLOOR.
FAN SWITCH HAS
NO "OFF" POSITION-
WILL RUN ON "LO"
SPEED WHEN SYSTEM
TEMPERATU VER POSITION WILL SELECTOR LEVER IS
REGULATE OUTLET AIR TEMPERATURE MOVED TO "OFF" AS
BY BLENDING THE INCOMING OUTSIDE LONG AS IGNITION
AIR THRUIAROUND THE HEATER CORE.
IS IN "RUN" POSITION.
4241
FIG. 1A-3 1977 F SERIES HEATER CONTROL