Dodge Sprinter 2006 Manual page 2034

24 - 2 HEA TING & AIR CONDITIONING
Fig. 2 Heater Housing
1 - SCREW (12)
2 - UPPER HOUSING
3 - A/C EVAPORATOR
4 - EVAPORATOR O-RING SEAL (2)
5 - EVAPORATOR GASKET
6 - VENTILATION HOUSING GASKET
7 - LOWER HOUSING
8 - WIRING HARNESS
9 - BOLT (3)
10 - HEATER CORE
11 - HEATER CORE TUBE ASSEMBLY
12 - HEATER CORE TUBE GASKET
13 - HEATER CORE TUBE O-RING SEAL (2)
Som e veh icles a r e equ ipped wit h a n a ddit ion a l
Den so 10S17 A/C com pr essor m ou n t ed t o t h e en gin e
wh ich is u sed for t h e opt ion a l r ea r A/C syst em a n d
va r iou s a dd-on A/C syst em s (F ig. 3).
Fig. 3 Denso 10S17 A/C Compressor
A h ea t er boost er is u sed t o a id in wa r m in g t h e
en gin e coola n t . Th e h ea t er boost er syst em ca n be
swit ch ed on wh ile t h e veh icle is bein g dr iven t o h elp
t h e en gin e r ea ch it s n or m a l oper a t in g t em per a t u r e
qu ickly a n d will h elp a id in h ea t in g u p t h e a ir wit h in
t h e pa ssen ger com pa r t m en t qu ickly wh en r equ est ed
by t h e oper a t or (F ig. 4).
Fig. 4 Heater Booster
OPERA TION
Ou t side a ir en t er s t h e veh icle t h r ou gh t h e h ood
open in g a t t h e ba se of t h e win dsh ield, a n d pa sses
t h r ou gh t h e ven t ila t ion h ou sin g loca t ed in t h e en gin e
com pa r t m en t in t o t h e h ea t er h ou sin g loca t ed beh in d
t h e in st r u m en t pa n el. Air flow velocit y is a dju st ed
wit h t h e blower m ot or speed select or t h u m bwh eel on
t h e A/C-h ea t er con t r ol. Th e a ir in t a ke open in gs m u st
be kept fr ee of sn ow, ice, lea ves, a n d ot h er obst r u c-
t ion s for t h e H VAC syst em t o r eceive a su fficien t vol-
u m e of ou t side a ir.
Th e a u t om a t ic t em per a t u r e con t r ol (ATC) syst em
con t r ols in t er ior t em per a t u r e by t a kin g a ct u a l va lu es
fr om t h e t em per a t u r e sen sor s a n d t h e CAN bu s a n d
com pa r in g t h em t o t h e n om in a l va lu e of t h e t em per-
a t u r e con t r ol swit ch . Th e elect r ic pu lsed h ea t er va lve
is t h en en er gized depen din g on t h e r equ est ed qu a n -
t it y of h ea t a n d a n elect r ica lly-oper a t ed wa t er pu m p
gives a n ea r ly con st a n t wa t er flow for exa ct t em per-
a t u r e r egu la t ion . If t h e solen oid is n ot en er gized, t h e
coola n t cir cu it t o t h e h ea t exch a n ger is fu lly open . To
con t r ol t h e t em per a t u r e t h e solen oid va lve is pu lsed
by t h e ATC in per iods of fou r secon ds.
Th e m ode con t r ol kn ob on t h e A/C-h ea t er con t r ol is
u sed t o dir ect t h e con dit ion ed a ir flow t o t h e select ed
a ir ou t let s. Th e m ode con t r ol kn ob oper a t es t h e m ode
door s by ca bles con n ect ed t o t h e m ode door s.
VA