Cadillac 60 Series 1963 Shop Manual page 384

HEATING AND AIR CONDITIONING
13-3
Water
Inlet
Fitting
Water
Outlet
Fitting
Heater Air
Inlet Duct
Blower
Assembly
Defroster
Outlets
OUTSIDE
AIR
tf 'h
Heater
Outlet
Heater
Case
Heater
Core
A water control valve in the right hand unit
regulates the flow of water for both units, Fig.
13-6.
The rear heaters are operated by separate con-
trols located in a panel behind a sliding door just
above the right rear arm rest, Fig. 13-7. The
Fig. 13-5 Front Unit Heater Assembly - 75 Series
temperature knob regulates the water control
valve, thereby controlling the discharge air tem-
perature. Turning the knob clockwise increases
the amount of water entering the rear heater
cores.
The fan knob turns the two rear blowers ' ' On''
and "Off" and controls their two speeds.
\
Left Rear
Heater Core
Water Pump
Outlet Fitting
%" I.D.
Return Hose
5
/
8
" I.D.
Feed Hose
Inlet Fitting
n_
Water
Control
Valve
Right Rear
Heater Core
Fig. 13-6 Heater Water Flow - 75 Series