Carrier SUPRA 950Mt - Figure 4-7 Dual Vacuum Pump Connections; Charging the Refrigerant System

4
-
1
1
6
2
-
-
6
1
1
X
X
-
-
2
0
(
0
3
/
0
4
)
1.
Evap
ora
tor
Coi
l
2.
Con
den
sato
r
Coi
l
3.
Re
ce
iv
er
4.
Recei
ver
Serv
ice
Val
ve
5.
Dis
char
ge
Ser
vic
e V
alv
e
6.
Suc
tio
n S
erv
ic
e
Va
lve
7.
Ma
no
me
te
r
8.
V
acc
um
Pu
mp
9;
V
acc
um
me
te
r
1.
1.
1.
2.
3.
4.
5.
6.
7.
7.
7.
7.
8.
8.
9.
Figure 4-7
Dual Vacuum Pump Connections
4.8
CH
ARG
ING
THE
REF
RIG
ERA
NT
SY
STE
M
4.
8.
1
Ins
ta
lli
ng
a
com
ple
te
cha
rge
a.
Dehydrate unit and leave
in deep vacuum. (Refer to
section 4.7)
b.
 Pl
ace
refr
ige
rant
cyl
ind
er
on
sca
le
and
con
nec
t
charging line from cylinder to receiver outlet (king)
valve. Purge charging line at outlet valve.
c.
Note weight of refrigerant cylinder.
d.
Open liquid valve on refrigerant cylinder. Open king
valve h
alf way
and al
low
the liq
uid
refrige
rant to
flow
in
to
the
un
it
un
til
thecorre
ct
we
ig
ht
of
re
fri
ge
ran
t
ha
s
been added as indicated by scales. Correct charge
will be found in Table 2-1.
NOTE
It is possible that all liquid may not be pulled into the
receiver, as outlined in step d. In this case, vapor
cha
rge
rem
ain
ing
refri
ger
ant
thro
ugh
the
suc
tion
service valve.
e.
 When refrigerant cylinder weight (scale) indicates
that the correct charge has been add
ed, close
liqui
d
line valve on cylinder and backseat the king valve.
4.8
.2
Che
cki
ng
the
ref
rig
era
nt
cha
rge
Start unit in cooling mode. Run approximately ten
minutes. Partially block off air flow to condenser coil so
discharge pressure rises to 14.8 kg/cm
@
(210 psig).
The
uni
t
is
corr
ectl
y
cha
rge
d
whe
n
the
low
er
rece
ive
r
sight glass is full and no refrigerant is in the upper
receiver sight glass.