Carrier SUPRA 750Mt - 4.12 CHECKING AND REPLACING FILTER-DRIER

4
-
3
6
2
-
-
6
1
1
X
X
-
-
2
0
(
0
3
/
0
4
)
4.3
SER
VIC
ING
EN
GIN
E
RE
LA
TED
COMPONENTS
4.
3.
1
Co
ol
in
g
sy
st
em
The condenser and radiator assembly is designed
with the radiator located after the condenser coil. The
co
nd
en
se
r
fan
s
dr
aw
the
ai
r
thr
ou
gh
the
co
nd
en
se
r
an
d
radiator coil.
1.
Cleani
ng the
cooling
system
The condenser and radiator can be cleaned at the
same time. The radiator must be cleaned internally as
well as externally to maintain adequate cooling.
R
e
m
o
v
e
a
l
l
f
o
r
e
i
g
n
m
a
t
e
r
i
a
l
f
r
o
m
t
h
e
rad
iato
r/co
nde
nse
r
coi
l
by
rev
ersi
ng
the
nor
mal
air
flow
.
(Ai
r
is
pu
ll
ed
in
th
rou
ghthe
fro
nt
an
d
di
sc
ha
rg
es
ov
er
the
standby motor.) Compressed air or water may be used
as a cleaning agent.
WARNING
Do not use high pressure water spray
to avoid damaging condenser fins.
2.
Replac
e c
oolant
a.
Drain coo
lant by removing lowe
r radiator hose and
radiator cap.
b.
Inst
all hose and
fill syste
m
with clean
,
untr
eate
d
wate
r
to
whi
ch
any
pro
pri
etar
y
rad
iato
r
cle
ane
r
sh
ou
ld
be
ad
de
d
(si
x
ou
nc
es -
- dry
15
1
gr
am
s
to
on
e
gallon = 3.78 liters) of water.
c.
Ru
n
en
gi
ne
for
thetime
rec
co
me
nd
ed
by
theclea
ne
r
product used and drain system while warm. Rinse
system three times after it has cooled down. Refill
system with water.
d.
Run engin
e to operating tem
peratur
e. Drain system
aga
in
and
fill
with treated
wate
r/an
ti-fr
eez
e.
(se
e
Cau
tion
and refe
r to
sec
tio
n 1.2) NEVER POUR
COLD WATER INTO A HOT ENGINE, however hot
water can always be added to a cold engine.
3.
Check
ing ra
diator
operation
a.
Check visua
lly the cooling system (special
ly hose
between radiator and coolant bottle).
b.
Ver
ify coolan
t level inside the rad
iator and top up if
necessary.
c.
Pow
er up
the u
nit.
d.
Run engin
e to
operati
ng temperatu
re until coolant
le
ve
l
in
co
ol
an
t
bo
ttl
e
in
cre
as
es
(fl
ow
fro
m
the
radiator to the coolant bottle).
e.
Sto
p
theunitand
ve
ri
fy
tha
t
co
ol
an
t
de
cre
as
es
in
si
de
the coola
nt bottle (flow from the coola
nt bottle to
the
radiator).
WTS
(microprocessor)
Coolant pump
Thermostat
Coolant outlet
(hot side)
Pressure cap
Coolant bottle
Over flow
Coolant inlet
(cold inside)
Figure 4-
1
Cooling ci
rcuit