Citroen C4 2014.5 2.G Manual Online

79
Ventilation
Air intake
The air circulating in the passenger compartment   is   filtered   and   originates   either  
f

rom   the   outside   via   the   grille   located   at   the  
b

ase   of   the   windscreen   or   from   the   inside   in   air  
re

circulation
 m
ode.
Air treatment
The incoming air follows various routes depending   on   the   controls   selected   by   the  
d

river:
-
 
d
irect   arrival   in   the   passenger  
c

ompartment   (air   intake),
-
 
p
assage   through   a   heating   circuit   (heating),
-
 
p
assage   through   a   cooling   circuit   (air  
c

onditioning).
Control panel
The controls of this system are grouped together   on   control   panel   A on the centre
console.
Air distribution
1. Windscreen d emisting-defrosting v ents.
2. F ront   side   window   demisting-defrosting  
ve

nts.
3.
 S

ide   adjustable   air   vents.
4.
 C

entral   adjustable   air   vents.
5.
 A

ir   outlets   to   the   front   footwells.
6.
 A

ir   nozzles   to   the   front   footwells.
7.
 A

ir   outlets   to   the   rear   footwells.
4
Comfort

80
Stop & Start
The heating and air conditioning systems   only   work   when   the   engine  
i

s   running.   To   maintain   a   comfortable  
t

emperature   in   the   passenger  
c

ompartment,   you   can   temporarily  
d

eactivate   the   Stop   &   Start   system   (see  
t

he   corresponding   section).
In
 
order
 
for
 
these
 
systems
 
to
 
be
 
fully
 
effective,
 
follow
 
the
 
operation
 
and
 
maintenance
 
g

uidelines
 belo

w:
F
 
T

o
 
obtain
 
an
 
even
 
air
 
distribution,
 
take
 
care
 
not
 
to
 
obstruct
 
the
 
exterior
 
air
 
intake
 
grilles
 
l

ocated
 
at
 
the
 
base
 
of
 
the
 
windscreen,
 
the
 
nozzles,
 
the
 
vents
 
and
 
the
 
air
 
outlets,
 
as
 
well
 
a

s
 
the
 
air
 
extractor
 
located
 
in
 
the
 
boot.
F
 
D

o
 
not
 
cover
 
the
 
sunshine
 
sensor,
 
located
 
on
 
the
 
dashboard;
 
this
 
is
 
used
 
for
 
regulation
 
o

f
 
the
 
air
 
conditioning
 
system.
F
 
O

perate
 
the
 
air
 
conditioning
 
system
 
for
 
at
 
least
 
5
 
to
 
10
 
minutes,
 
once
 
or
 
twice
 
a
 
month
 
t

o
 
keep
 
it
 
in
 
per fect
 
working
 
order.
F
 
E

nsure
 
that
 
the
 
passenger
 
compartment
 
filter
 
is
 
in
 
good
 
condition
 
and
 
have
 
the
 
filter
 
e

lements
 
replaced
 
regularly.
  W

e
 
recommend
 
the
 
use
 
of
 
a
 
combined
 
passenger
 
compartment
 
filter.
 
Thanks
 
to
 
its
 
s

pecial
 
active
 
additive,
 
it
 
contributes
 
to
 
the
 
purification
 
of
 
the
 
air
 
breathed
 
by
 
the
 
o

ccupants
 
and
 
the
 
cleanliness
 
of
 
the
 
passenger
 
compartment
 
(reduction
 
of
 
allergic
 
s

ymptoms,
 
bad
 
odours
 
and
 
greasy
 
deposits).
F
 
T

o
 
ensure
 
correct
 
operation
 
of
 
the
 
air
 
conditioning
 
system,
 
you
 
are
 
also
 
advised
 
to
 
have
 
i

t
 
checked
 
regularly
 
as
 
recommended
 
in
 
the
 
maintenance
 
and
 
warranty
 
guide.
F
 
I

f
 
the
 
system
 
does
 
not
 
produce
 
cold
 
air,
 
switch
 
it
 
off
 
and
 
contact
 
a
 
CITROËN
 
dealer
 
or
 
a
 
q

ualified
 w

orkshop.
When
 
towing
 
the
 
maximum
 
load
 
on
 
a
 
steep
 
gradient
 
in
 
high
 
temperatures,
 
switching
 
off
 
the
 a
ir
 
conditioning
 
increases
 
the
 
available
 
engine
 
power
 
and
 
so
 
improves
 
the
 
towing
 
ability. The
  condensation   created   by   the   air  
c

onditioning   results   in   a   discharge  
o

f   water   under   the   vehicle   which   is  
p

er fectly   normal.
If   after   an   extended   stop   in   sunshine,  
t

he   interior   temperature   is   very  
h

igh,   first   ventilate   the   passenger  
c

ompartment   for   a   few   moments.
Put   the   air   flow   control   at   a   setting   high  
e

nough   to   quickly   change   the   air   in   the  
p

assenger
 c
ompartment.
The   air   conditioning   system   does   not  
c

ontain   chlorine   and   does   not   present  
a

ny   danger   to   the   ozone   layer.
Recommendations for ventilation and air conditioning
Comfort

81
Recommended interior settings
Digital air conditioning: use   the   automatic   mode   in   preference   by   pressing   the   "AUTO"  button.
I require...
Heating or Manual air conditioning
Air distribution Air flowRecirculation of interior air /
Intake of exterior air Temperature Manual AC
HOT
COLD
DEMISTING
DEFROSTING
4
Comfort

82
Manual air conditioning
The air conditioning system operates only with the engine running.
F  
T
urn   the   dial   to   select   a  
p

osition   between   blue   (cold)  
a

nd   red   (hot)   so   as   to   adjust  
t

he   temperature   to   your  
r

equirements.
1. Temperature adjustment
This dial is used to increase or decrease   the   speed   of   the   air  
b

ooster   fan.
2. Air flow adjustment 3. Air distribution adjustment
Windscreen and side windows.
W indscreen,   side   windows   and  
f

ootwells.
Footwells.
Central
  and   side   vents.
The
  air   distribution   can   be  
a

dapted   by   placing   the   dial   in   an  
i

ntermediate
 p
osition.
F
 T
urn
 
the
 
dial
 
from
 
position
 
1 to position 5 to
obtain
 
a
 
comfortable
 
air
 
flow. This
 
dial
 
is
 
used   to   arrange   the   distribution   of  
a

ir
 
in
 
the
 
passenger   compartment  
b
y   combining  
s

everal
 
air
 
outlets.
F

I

f you place the air flow control
in position 0 ,
 
the
 
system
 
is
 
d

eactivated.
 
However,
 
a
 
slight
 
flow
 
o

f
 
air,
 
due
 
to
 
the
 
movement
 
of
 
the
 
v

ehicle,
 
can
 
still
 
be
 
felt.
Avoid
 
driving
 
too
 
long
 
with
 
the
 
v

entilation
 
off
 
(risk
 
of
 
misting
 
and
 
d

eterioration
 
of
 
air
 
quality).
Comfort

83
4. Air intake / Air recirculation 5. Air conditioning On / Off
The air conditioning is designed to operate effectively in all seasons,
with
  the   windows   closed.
It
 
enables
 
you   to:
-
 
l

ower
 
the   temperature,   in   summer,
-
 
i

ncrease   the   effectiveness   of   the   demisting  
i

n
 
winter,   above   3   °C.Switching on
F Press the "A /C "  button,   the   button's  i
ndicator   lamp   comes   on.
Switching off
F Press the "A /C " button   again,   the   button's  i
ndicator   lamp   goes   off.
Switching
  off   may   affect   comfort   levels  
(

humidity,
 c
ondensation).
The
 
intake
 
of
 
exterior
 
air
 
prevents
 
the
 
formation
 
o

f
 
mist
 
on
 
the
 
windscreen
 
and
 
side
 
windows.
The recirculation of interior air isolates the
passenger
 
compartment
 
from
 
exterior
 
odours
 
a

nd
 
smoke.
F
P
ress the button to recirculate
the
 
interior
 
air.
 
The
 
indicator
 
l

amp
 
comes
 
on
 
to
 
confirm
 
this.
F
 
P

ress
 
the
 
button
 
again
 
to
 
permit
 
the
 
intake
 
o

f
 
exterior
 
air.
 
The
 
indicator
 
lamp
 
goes
 
off
 
t

o
 
confirm
 
this.
Return
 
to
 
exterior
 
air
 
intake
 
as
 
soon
 
as
 
possible
 
t

o
 
prevent
 
deterioration
 
of
 
the
 
the
 
air
 
quality
 
a

nd
 
the
 
formation
 
of
 
mist.
This
 
function
 
allows
 
hot
 
or
 
cold
 
air
 
to
 
be
 
d

elivered
 
selectively
 
and
 
more
 
quickly.
The  air   conditioning   does   not   operate  
w

hen   the   air   flow   adjustment   control   2
is in position " 0".
To   obtain   cooled   air   more   quickly,   you  
c

an use recirculation of interior air for a
few   moments.   Then   return   to   fresh   air  
i

ntake.
4
Comfort

84
Dual-zone digital a ir c onditioning
Automatic operation
We recommend the use of one of t
he   three   AUTO   modes   available:  
t

hey   provide   optimised   regulation   of  
t

he   temperature   in   the    passenger  
c

ompartment   according   to   the  
c

omfort   value   that   you   have  
c

hosen. F

P
ress the "AUTO"
 
button   repeatedly:
-
 a

  first   indicator   lamp   comes   on;   the   "light"
 s

etting   mode   is   selected,
-
 
a
  second   indicator   lamp   comes   on;   the  
"

medium"   setting   mode   is   selected,
-
 
a
  third   indicator   lamp   comes   on;   the  
"

intense"   mode   setting   is   selected.
The
 
air
 
conditioning   system   operates   when   the   engine   is   running.
1. Automatic comfort
programme
This system is designed to operate effectively i
n   all   seasons,   with   the   windows   closed.When
  the   engine   is   cold,   the   air   flow   will  
r

each   its   optimum   level   progressively,  
t

aking   account   of   the   weather   and   the  
d

esired   comfort   level   so   as   to   avoid   too  
g

reat   a   distribution   of   cold   air.
On   entering   the   vehicle,   if   the   interior  
t

emperature   is   much   colder   or   warmer  
t

han   the   comfort   value,   there   is   no  
n

eed   to   change   the   value   displayed   in  
o

rder   to   obtain   the   comfort   required.  
T

he   system   corrects   the   difference  
i

n   temperature   automatically   and   as  
q

uickly   as   possible.
These
 
three
 
modes
 
automatically
 
adjust
 
the
 
a

ir
 
flow,
 
according
 
to
 
the
 
desired
 
setting,
 
while
 
a

lso
 
maintaining
 
the
 
desired
 
comfort
 
value.
Comfort

85
See "Front demisting - defrosting".
4. Automatic visibility programmeIf you wish, you can make a different choice f
rom   that   offered   by   the   system   by   changing  
a

  setting.   The   the   "AUTO"
 
indicator   lamps   go  
o

ff;   the   other   functions   will   still   be   controlled  
au

tomatically.
F
 
P
ressing   the   "AUTO" button returns the
system
  to   completely   automatic   operation.2. Driver's side adjustment
The driver and front passenger can each   adjust   the   temperature   to   their  
r

equirements.
F

T

urn control 2 or 3   to   the   left   or   to   the   right  
r

espectively   to   decrease   or   increase   this  
va

lue.
A
 
setting
 
around   the   value   21   provides  
o

ptimum
 
comfort.   However,   depending   on   your  
r

equirements,   a   setting   between   18   and   24   is  
n

ormal.
You
 
are
 
advised   to   avoid   a   left   /   right   setting  
d

ifference
 
of   more   than   3.
3. Passenger's side adjustment
The value indicated on the display corresponds to   a   level   of   comfort   and   not   to   a   temperature   in  
d

egrees   Celsius   or   Fahrenheit. With
  Stop   &   Start,   when   demisting   has  
b

een   activated,   the   STOP   mode   is   not  
a

vailable.For
  maximum   cooling   or   heating   of   the  
p

assenger   compartment,   it   is   possible  
t

o   exceed   the   minimum   value   14   or   the  
m

aximum   value   28.
F

T
urn control 2 or 3 to the left until
"LO"
  is   displayed   or   to   the   right  
u

ntil "HI"
 
is   displayed.
Manual operation
4
Comfort

86
7. Air flow adjustment
F Turn this control to the left to decrease   the   air   flow   or   to   the  
r

ight   to   increase   the   air   flow.
The
 
air
 
flow
  indicator   lamps,   between   the  
t

wo fans,
 
come   on   progressively   in   relation   to  
t

he
 
value
 
requested.
5. Air conditioning On / Off
F Press this button to switch off the   air   conditioning.
Switching
 
the   system   off   could   result   in  
d

iscomfort
 (
humidity,
 c
ondensation).
F
 
P

ress
 
this   button   again   to   return   to  
a

utomatic   operation   of   the   air   conditioning.  
T

he
 
indicator   lamp   on   the   "A /C " button
comes
 
on. F
 P ress   one   or   more   buttons   to  d
irect   the   air   flow   towards:
6. Air distribution adjustment
- the  windscreen   and   side   windows  (
demisting   or   defrosting),
-
 
t
he   outer   and   centre   air   vents,
-
 
t
he   footwells.
You
  can   combine   the   three   orientations   to  
o

btain   the   desired   air   distribution.
Comfort

87
9. "REST" function: ventilation with the engine off
Even with the engine is off, you 
c an operate the ventilation for a
few
 m

inutes.
8. Air intake / Air recirculation
F Press this button for recirculation of   the   interior   air.   The   indicator l

amp   in   the   button   comes   on.
Air
 
recirculation   enables   the   passenger  
c

ompartment   to   be   isolated   from   exterior  
o

dours
 
and
  smoke.
F
a
s s

oon as possible, press this button
again
 
to   permit   the   intake   of   outside   air   and  
p

revent
  the   formation   of   condensation.   The  
i

ndicator   lamp   in   the   button   goes   off.
Avoid
  prolonged   operation   in   interior   air  
r

ecirculation   mode   (risk   of   misting   and  
d

eterioration   of   air   quality). For
  example,   while   you   are   away   from   the  
v

ehicle,   the   passengers   can   still   enjoy   some   air  
c

irculation   without   having   the   engine   running.
This
  function   is   available   after   switching   on   the  
i

gnition,   as   well   as   after   stopping   the   engine.
The
  period   that   the   function   is   available  
d

epends   on   the   state   of   charge   of   the   battery.
You can activate the "REST" function while the
air
  conditioning   control   screens   are   on.On switching on the engine
-
 T he   control   screens   come   on:   the   function  
i

s   available.
-
 
P
ressing   the   REST button activates the
ventilation
  for   a   few   minutes.   Activation   of  
t

he   function   is   confirmed   by   the   display   of  
t

wo   dashes   in   the   control   screens   and   four  
a

ir   flow   level   indicator   lamps.
-
 
T
he   function   can   be   deactivated   and  
r

eactivated   if   the   control   screens   are   on.
-
 
T
he   screens   go   off   at   the   end   of   this  
p

eriod.
4
Comfort

88
Switching the system off
On stopping the engine
- W hile   the   control   screens   remain   on:   the  
f

unction   is   available.
-
 
P
ressing   the   REST button activates the
ventilation
  for   a   few   minutes.   Activation   of  
t

he   function   is   confirmed   by   the   display   of  
t

wo   dashes   in   the   control   screens   and   four  
a

ir   flow   level   indicator   lamps.
 L

ocking   the   vehicle   has   no   effect   on   this  
f

unction.
-
 
T
he   control   screens   go   off   at   the   end   of   this  
p

eriod.
 P

ressing   again   before   the   end   of   the   period  
i

nterrupts   off   the   ventilation   definitively:   the  
c

ontrol   screens   go   off   and   the   function   is  
n

o   longer   available. F

T
urn the air flow control to the
left   until   all   of   the   indicator  l
amps   go   off.
This   action   switches   off   the   air   conditioning   and  
th

e
 v
entilation.
Temperature
  related   comfort   is   no   longer  
a

ssured   but   a   slight   flow   of   air,   due   to   the  
m

ovement   of   the   vehicle,   can   still   be   felt.
F
 
M
odify   the   settings   (temperature,   air   flow  
o

r   air   distribution)   or   press   the   "AUTO"
button
  to   reactivate   the   system   with   the  
v

alues   set   before   it   was   switched   off.
Avoid
  prolonged   operation   in   interior  
a

ir   recirculation   mode   or   driving   for  
l

ong   periods   with   the   system   off   (risk   of  
m

isting   and   deterioration   of   air   quality).
This
  switch   does   not   operate   the   air  
c

onditioning,   only   the   air   fan.
When
  the   "REST"   function   is   activated,  
y

ou   cannot   modify   the   temperature,   air  
f

low   and   distribution   settings:   these   are  
c

ontrolled   automatically   according   to  
t

he
 a
mbient
 t
emperature.
This function is not available in the
STOP
  mode   of   Stop   &   Start.
Comfort