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RADIO AND OTHER ACCESSORIES
HEATER
11-31
d. Use
of Heater and V
entila t ors
in
Summe r
In normal summer weather, outside air
ventilation
is obtained by pulling out the air
ventilator knob marked "VENT" (1948) or
"VENTILATION" (1949) to the desired point.
This opens the outside air outlet control valves
and allows outside air to be forced from behind
the radiator grille through the air intake ducts
into the body under the cowl. See figure
11-32.
When additional outside air
ventilation
is
desired, the heater may be used to secure in-
creased circulation in the fo
llowing
manner:
1. Shut
off
heat
by
turning
the
knob
ma r ked "WARMER" counterclockwise to full
off
position.
2. Pull out to full ope
n position
the knob
marked "HEAT" (1948) or
"HEATER
AIR"
(1949) .
3. Close all
windows and open all door
ventilators.
4. Outside air will be forced into front of
body
through
ventilator outlets under the cowl,
and into rear of car through the heater. At
speeds
below
30 MPH the
blower
a
lso
may be
t
urned
on if desired.
5.
On
cool su
mmer evenings
it mig ht often
be
desirable
to adj
ust
the
temperature control
in a
clockwise direction t
o sl
ig htly warm
the
outside
air
entering through
the
heater.
8.
To shut heater off, push in on knobs
marked "BLOWER" and "HEAT" or "HEAT-
ER AIR," also knob marked "DEFROSTER"
if this is out. It is not necessary to turn off
OF
change setting of temperature control knob
once it is set for the most desirable car tem-
perature.
c.
Use of Heater and Defroster Controls
The
controls sho uld
be used in t
he
following
manner to t
urn
heater
and defroster
on and
off, and to regulate heater to
obtain
the car
te
mperature desired.
1.
Open
front door
ventilator
about
If:,!".
If
heat distribution to rear seat passengers is a
lso
desired,
open rear ventilator a
bout
V2".
(Se-
lect
ventilators
on
opposite
side fro
m wh ich
wi
nd
ma y be
blowing).
2. Make sure that knob marked "VENT"
(1948) or
"VENTILATION"
(1949) is
pushed
a
ll
the way for
ward t
o prevent cold a
ir enter-
ing
car
through
air
ventilators.
3. Pull
out knob
marked "
HEA T"
(1948)
or "HEATER
AI
R"
(1
949 ) .
4.
If
max imum heat is desired a
t start, turn
temperature control
knob marked
"WARMER"
as far as it will go clockwise, or in the direc-
tion of arrow. If less
than
maxi
m um
hea t is
desired,
set knob at desired point
between
e
.
W
iring
Connections for Heater and
closed
and fully op
en
positions.
Defroster Blower Switches-1948 Models
5.
If
car is stopped, or is ope
rating
at
The upper terminal of t
he h
ea t er "BLOW-
s
pee ds
below 30
MPH pull
out
knob
marke d
ER"
switch
is connected to t
he blower motor.
"
BLOW E R." At spe eds
a
bove
30 MPH the
The lower
t
ermin al of
swi tc h
is
con ne cted
to
blower need not be turned
on.
the ignition
t
erminal
of
the
gasoline
ga uge. The
6.
If
maxi
m um
heat
distrib ution
is
desired,
upper
t
erminal
of
t
he
"
DEFROS TER"
switch
or windshield defrosting is
r
equ ired ,
pull out
is con
nected
to the defroster motor. The lower
knob marked "DEFROSTER."
term
inal
of switch is connected to the lower
7.
As heat requirements change, the tem-
terminal
of the heater "BLOWER" switch.
perature in the car may be set at a higher or
When the switches are
properly
connected
lower level by t
urni ng
te
mperature control
as described, the heater a
nd
defr oster
blowers
kn
ob
as
indicated by the a
r row. Once
set
f
or
a
wi
ll op
er ate
only wh
en
th
e
ig n ition switch
is
desired
ca
r tem pe rat ure t
he
th
ermostat w
ill
t
urned on. Th
is
prevents disc harge
of the bat-
au
t om a t ically ma in tain this te
mperat u re
w
ith-
tery
in
case the heater or defroster switch is
out
furthe
r attention.
left on
whe n
t
he
car is
parked.
SEE WARNING ABOUT CARBON MONOXIDE ON PAGE 11-37
of
air
is not
restricted a
n d when car is
in
for-
ward motion a
partial vacuum
is created in the
body which w
ill
permit the
maximum
flow of
air through the heater unit into the body. See
figure 11-30.
The
distribution
of warm air between the
front a
nd
rear seat passengers can be
con-
trolled to some extent by regulating the amount
of opening of front and rear ventilators. See
figure 11-31.
Additional distribution
of heat also may be
obtained if the defroster is turned
on . T
h is
circulates air through a separate heating core
in
the defroster unit, forcing it upwa r d
throug h openings
at lower edge of w
indshield,
f
rom
which it is deflected rearward int o
t
he
body.
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